CN205153293U - Hollow core slab buries core pore -forming pipe - Google Patents
Hollow core slab buries core pore -forming pipe Download PDFInfo
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- CN205153293U CN205153293U CN201520774781.XU CN201520774781U CN205153293U CN 205153293 U CN205153293 U CN 205153293U CN 201520774781 U CN201520774781 U CN 201520774781U CN 205153293 U CN205153293 U CN 205153293U
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- Prior art keywords
- precast hollow
- forming pipe
- pore
- hollow slab
- projection
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- 239000011148 porous material Substances 0.000 title abstract 4
- 239000000463 material Substances 0.000 claims description 7
- 230000015572 biosynthetic process Effects 0.000 claims description 5
- 229920003023 plastic Polymers 0.000 claims description 5
- 239000004033 plastic Substances 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 4
- 239000004567 concrete Substances 0.000 abstract description 25
- 238000000034 method Methods 0.000 abstract description 25
- 230000008520 organization Effects 0.000 abstract description 11
- 230000009471 action Effects 0.000 abstract description 3
- 230000002349 favourable effect Effects 0.000 abstract 1
- 230000008569 process Effects 0.000 description 24
- 238000010276 construction Methods 0.000 description 16
- 230000000694 effects Effects 0.000 description 16
- 229910000831 Steel Inorganic materials 0.000 description 13
- 230000003014 reinforcing effect Effects 0.000 description 13
- 239000010959 steel Substances 0.000 description 13
- 238000011065 in-situ storage Methods 0.000 description 6
- 238000011900 installation process Methods 0.000 description 4
- 238000007493 shaping process Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009415 formwork Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Abstract
The utility model provides a hollow core slab buries core pore -forming pipe, including a pipe body, the body is provided with at least one lug for lining up the hollow tube at the body surface. So, when the body for lining up the hollow tube, when the hollow tube was used in the hollow core slab, its tip link up, if still set up in the hollow tube and support core -pulling die, after the concrete placement is accomplished, will support core -pulling die and take out, so, can reduce pore -forming pipe wall thickness degree by a wide margin. In addition, still be provided with the lug at the surface of body, at preparation hollow core slab's in -process, the lug can play the support positioning action, prevents that the hollow tube from at the mould internal shift and the condition appearance that leads to sky core plate inner structure and project organization not to conform, fully having guaranteed hollow core slab's quality, if the position of lug sets up on two pore -forming pipes, form many empty ribs again among the hollow core slab, be favorable to reducing the concrete heat channel, improve hollow core slab's heat -proof quality.
Description
Technical field
The utility model relates to a kind of building unit, and particularly a kind of precast hollow slab buries core pore-forming pipe.
Background technology
China's Urbanization Construction is fast-developing, and construction scope ranks first in the world.Current, industrialization of construction industry is extremely urgent, and builing industry green construction transition, energy-saving and emission-reduction in building course, manufacture the precast hollow slab with superior structural performance, extremely need in order to build assembled architecture.
At present, the reinforced concrete floor of domestic employing has cast-in-situ floor and precast hollow slab floor, cast-in-situ floor good integrity, but needs on-the-spot formwork, then concreting, construction period difficulty is large, and template loss is large, and cost is high, and prefabricated building hollowcore slab does not need on-the-spot formwork, short construction period, cost is low, is therefore widely used in all kinds of building.
Such as, be: in the application documents of CN201320705360.2 that disclose a kind of full prefabricated hollow floor, comprise floor main body, floor main body comprises bottom, hollow device and top layer, is hollow device between bottom and top layer at number of patent application; Bottom is that the baseplate reinforcing bar of layer of concrete and top colligation thereof is formed; Top layer is roof steel bar, and concreting layer is formed.This full prefabricated hollow floor is owing to forming cavity at intralamellar part, alleviate the weight of floor self, compare laminated floor slab and also do not need second pouring, environmental protection and save the duration, but in the manufacturing process of this floor, there is hollow device displacement, the problem of the thickness of wayward top board and base plate, this has a strong impact on the overall performance of floor.
Utility model content
The technical problems to be solved in the utility model is: provide a kind of precast hollow slab to bury core pore-forming pipe, and it can solve the problem of precast hollow slab manufacturing process hollow core device displacement, thus improves the total quality of precast hollow slab.
Solution of the present utility model is achieved in that a kind of precast hollow slab buries core pore-forming pipe, comprises body, and described body is through hollow section, and outer surface of tube body is provided with at least one projection.So, when body is through hollow section, when hollow section is applied in precast hollow slab, its end is through, if also arrange support to loose core mould in hollow section, after pouring concrete completes, mould of support being loosed core is extracted out, so, significantly can reduce pore-forming tube wall thickness, also pore-forming pipe can not be caused to be out of shape, and then the situation that precast hollow slab hole wall can not be caused uneven occur.Similarly, if when hollow section tube wall rigidity is enough to support pouring concrete load, does not then need to arrange support and to loose core mould, can reach the uniform effect of hollowcore slab hole wall yet.In addition, also projection is provided with at the external surface of body, in the process making precast hollow slab, projection can play supporting and location effect, the situation preventing hollow section from causing hollowcore slab internal construction and project organization not to conform at mould internal shift occurs, fully ensure that the quality of precast hollow slab, if the position of projection is arranged on two pore-forming pipes, and when being close to arranged adjacent, how empty rib can also be formed in precast hollow slab again, be conducive to reducing concrete heat bridge, improve the heat-proof quality of precast hollow slab.
Another technical scheme of the present utility model is on above-mentioned basis, and described projection longitudinal separation spread configuration is in tube surfaces.So, when projection longitudinal separation spread configuration is in tube surfaces, in the process making precast hollow slab, projection and precast hollow board forming die die face support and combine, then can play supporting and location effect, the situation preventing hollow section from causing hollowcore slab internal construction and project organization not to conform at mould internal shift occurs, fully ensure that the quality of precast hollow slab, if and the position of projection is arranged on two pore-forming pipes, and when being close to arranged adjacent, how empty rib can also be formed in precast hollow slab again, be conducive to reducing concrete heat bridge, improve the heat-proof quality of precast hollow slab.
Another technical scheme of the present utility model is on above-mentioned basis, and described body cross section is rectangle.So, when body cross section is rectangle, described pore-forming pipe is applied to after in precast hollow slab, correspondingly can form through rectangle duct in hollowcore slab inside, cross section is the hollow rate that the pore-forming pipe of rectangle can increase substantially precast hollow slab, saves material, reduces precast hollow slab own wt.
Another technical scheme of the present utility model is, on above-mentioned basis, described tube wall to be provided with at least one transverse concave groove.So, when tube wall being provided with at least one transverse concave groove, transverse concave groove improves the side direction bearing capacity of pore-forming pipe, make it not yielding in application process, simultaneously, cast-in-situ concrete also can form concrete structure in transverse concave groove, improves the bonding strength between precast hollow slab two plate faces, prevents its dislocation in lifting and installation process from damaging.
Another technical scheme of the present utility model is, on above-mentioned basis, described body to be provided with at least one align member.So, when body being provided with at least one align member, described pore-forming pipe is in application process, align member can be supported on precast hollow board forming die, pore-forming pipe can be fixed in precast hollow board forming die, prevent it from swinging, fully can ensure that the thickness of precast hollow slab both sides plate body is consistent with design thickness.
Another technical scheme of the present utility model is, on above-mentioned basis, described projection to be provided with positioner.So, when projection is provided with positioner, in application process, positioner on described projection can coordinate screens to fix with reinforcing bar or steel wire, projection can play longitudinal bracing positioning action, the situation preventing hollow section from causing hollowcore slab internal construction and project organization not to conform at mould internal shift occurs, fully ensure that the quality of precast hollow slab.
Another technical scheme of the present utility model is on above-mentioned basis, and described positioner is groove.So, when positioner is groove, in application process, the situation that positioner can coordinate screens fixedly to prevent hollow section from causing hollowcore slab internal construction and project organization not to conform at mould internal shift with reinforcing bar or steel wire very easily occurs, fully ensure that the quality of precast hollow slab.
Another technical scheme of the present utility model is on above-mentioned basis, and described groove is into the large groove of young endoporus.So, when groove is into the large groove of young endoporus, in application process, reinforcing bar or steel wire snap in after in groove, in the process of building cast-in-situ concrete, enter the effect that the large groove of young endoporus can play snap close, thus make reinforcing bar or steel wire be not easy to eject.
Another technical scheme of the present utility model is on above-mentioned basis, and at least one end of described body is provided with enclosing cover, and body is closed into blind pipe or closed hollow pipe by described enclosing cover.So, when at least one end of body is provided with enclosing cover, body is closed into blind pipe or closed hollow pipe by described enclosing cover, described pore-forming pipe is applied to after in precast hollow slab, as end also concreting, then can form semiclosed or totally enclosed precast hollow slab, globality, the sound-insulating heat-insulation property of this precast hollow slab are good, in particular improve the bonding strength between precast hollow slab two plate faces, prevent its dislocation in lifting and installation process from damaging.
Another technical scheme of the present utility model is on above-mentioned basis, and described enclosing cover end is provided with keeper, and described keeper is arranged at enclosing cover edge or cover bottom portion.So, when enclosing cover end is provided with keeper, described keeper is arranged at enclosing cover edge or cover bottom portion, in application process, pore-forming pipe can be fixed in the moulding form of precast hollow slab by keeper, the situation preventing pore-forming tube end from causing hollowcore slab internal construction and project organization not to conform at mould internal shift occurs, fully ensure that the quality of precast hollow slab.
Another technical scheme of the present utility model is on above-mentioned basis, and described projection is arranged on two relative faces of body.So, projection is arranged on two relative faces of body, in application process, projection can be arranged at the reinforcing bar of its both sides or steel wire or precast hollow board forming die supporting and location, and after multiple pore-forming pipe arrangement, projection cooperatively interacts, and can play shaping effect of blocking, prevent the concrete of precast hollow slab both sides completely through, serve the effect reducing concrete heat bridge.
Another technical scheme of the present utility model is on above-mentioned basis, and described projection is arranged on four faces of body.So, when on four faces that projection is arranged at body, projection can be arranged at the reinforcing bar of its both sides or steel wire or precast hollow board forming die supporting and location, simultaneously, after multiple pore-forming pipe arrangement, projection cooperatively interacts, and can play and block shaping effect, prevent the concrete of precast hollow slab both sides completely through, serve the effect reducing concrete heat bridge.
Another technical scheme of the present utility model is on above-mentioned basis, and the material of described body is plastics, the projection global formation that described body and external surface thereof are arranged.So, when the material of body is plastics, during the projection global formation that described body and external surface thereof are arranged, pore-forming pipe is manufactured convenient and simple, and pipe thickness can strictly control, and, bonding strength between projection and body is good, is not easy damage and comes off, and fully ensure that the quality of pore-forming pipe.
Another technical scheme of the present utility model is on above-mentioned basis, and described projection shifts to install on relative two faces of body.So, when projection shifts to install on relative two faces of body, in application process, after multiple pore-forming pipe arrangement, the projection shifted to install complements each other to form and blocks, and can reduce producting process difficulty, is conducive to reducing costs, raises the efficiency.
Accompanying drawing explanation
The accompanying drawing forming a part of the present utility model is used to provide further understanding of the present utility model, and schematic description and description of the present utility model, for explaining the utility model, is not formed improper restriction of the present utility model.
Fig. 1 is that the precast hollow slab that a kind of embodiment of this programme relates to buries core pore-forming duct ligation composition;
Fig. 2 and Fig. 3 is that the precast hollow slab that the another two kinds of embodiments of this programme relate to buries core pore-forming duct ligation composition;
Fig. 4 and Fig. 5 is that the precast hollow slab that the another two kinds of embodiments of this programme relate to buries core pore-forming duct ligation composition.
In figure:
1 body 2 projection 3 transverse concave groove 4 enclosing cover 40 keeper
5 align members
Detailed description of the invention
Be described in detail the utility model below in conjunction with accompanying drawing, the description of this part is only exemplary and explanatory, should not have any restriction to protection domain of the present utility model.In addition, those skilled in the art, according to the description of presents, can carry out respective combination to the feature in embodiment in presents and in different embodiment.
The utility model embodiment is as follows, refers to Fig. 1 to Fig. 5, and a kind of precast hollow slab buries core pore-forming pipe, comprises body 1, and described body 1 is through hollow section, and body 1 external surface is provided with at least one projection 2.So, when body 1 is through hollow section, when hollow section is applied in precast hollow slab, its end is through, if also arrange support to loose core mould in hollow section, after pouring concrete completes, mould of support being loosed core is extracted out, so, significantly can reduce pore-forming tube wall thickness, also pore-forming pipe can not be caused to be out of shape, and then the situation that precast hollow slab hole wall can not be caused uneven occur.Similarly, if when hollow section tube wall rigidity is enough to support pouring concrete load, does not then need to arrange support and to loose core mould, can reach the uniform effect of hollowcore slab hole wall yet.In addition, also projection is provided with at the external surface at body, in the process making precast hollow slab, projection can play supporting and location effect, the situation preventing hollow section from causing hollowcore slab internal construction and project organization not to conform at mould internal shift occurs, fully ensure that the quality of precast hollow slab, if the position of projection is arranged on two pore-forming pipes, and when being close to arranged adjacent, how empty rib can also be formed in precast hollow slab again, be conducive to reducing concrete heat bridge, improve the heat-proof quality of precast hollow slab.
On the basis of above-described embodiment, in another embodiment of the utility model, as shown in Figures 1 to 5, described projection 2 longitudinally can be arranged at body 1 surface.So, when projection 2 longitudinal separation spread configuration is in body 1 surface, in the process making precast hollow slab, projection and precast hollow board forming die die face support and combine, then can play supporting and location effect, the situation preventing hollow section from causing hollowcore slab internal construction and project organization not to conform at mould internal shift occurs, fully ensure that the quality of precast hollow slab, if and the position of projection is arranged on two pore-forming pipes, and when being close to arranged adjacent, how empty rib can also be formed in precast hollow slab again, be conducive to reducing concrete heat bridge, improve the heat-proof quality of precast hollow slab.
On the basis of above-described embodiment, in another embodiment of the utility model, as shown in Figures 1 to 5, described body 1 cross section can be rectangle.So, when body 1 cross section is rectangle, described pore-forming pipe is applied to after in precast hollow slab, correspondingly can form through rectangle duct in hollowcore slab inside, cross section is the hollow rate that the pore-forming pipe of rectangle can increase substantially precast hollow slab, saves material, reduces precast hollow slab own wt.Certainly, in other designs, described body 1 cross section also can be circular or ellipse or other polygons etc., and these also all belong to equivalent technologies and replace, and belong to the protection domain of this patent.
On the basis of above-described embodiment, in another embodiment of the utility model, as shown in Figure 4, described body 1 outer wall can be provided with at least one transverse concave groove 3.So, when body 1 outer wall is provided with at least one transverse concave groove 3, transverse concave groove 3 improves the side direction bearing capacity of pore-forming pipe, make it not yielding in application process, simultaneously, cast-in-situ concrete also can form concrete structure in transverse concave groove 3, improves the bonding strength between precast hollow slab two plate faces, prevents its dislocation in lifting and installation process from damaging.
On the basis of above-described embodiment, in another embodiment of the utility model, as shown in Figures 2 and 3, described body 1 can be provided with at least one align member 5.So, when body 1 being provided with at least one align member 5, described pore-forming pipe is in application process, align member 5 can be supported on precast hollow board forming die, pore-forming pipe can be fixed in precast hollow board forming die, prevent it from swinging, fully can ensure that the thickness of precast hollow slab both sides plate body is consistent with design thickness.
On the basis of above-described embodiment, in another embodiment of the utility model, described projection 2 can be provided with positioner.So, when projection 2 is provided with positioner, in application process, positioner on described projection 2 can coordinate screens to fix with reinforcing bar or steel wire, projection 2 can play longitudinal bracing positioning action, the situation preventing hollow section from causing hollowcore slab internal construction and project organization not to conform at mould internal shift occurs, fully ensure that the quality of precast hollow slab.
On the basis of above-described embodiment, in another embodiment of the utility model, described positioner can be groove.So, when positioner is groove, in application process, the situation that positioner can coordinate screens fixedly to prevent hollow section from causing hollowcore slab internal construction and project organization not to conform at mould internal shift with reinforcing bar or steel wire very easily occurs, fully ensure that the quality of precast hollow slab.
On the basis of above-described embodiment, in another embodiment of the utility model, described groove can be the groove that the little endoporus of entrance is large.So, when groove is into the large groove of young endoporus, in application process, reinforcing bar or steel wire snap in after in groove, in the process of building cast-in-situ concrete, enter the effect that the large groove of young endoporus can play snap close, thus make reinforcing bar or steel wire be not easy to eject.
On the basis of above-described embodiment, in another embodiment of the utility model, as shown in Figure 5, at least one end of described body 1 can be provided with enclosing cover 4, and body 1 is closed into blind pipe or closed hollow pipe by described enclosing cover 4.So, when at least one end of body 1 is provided with enclosing cover 4, body 1 is closed into blind pipe or closed hollow pipe by described enclosing cover 4, described pore-forming pipe is applied to after in precast hollow slab, as end also concreting, then can form semiclosed or totally enclosed precast hollow slab, globality, the sound-insulating heat-insulation property of this precast hollow slab are good, in particular improve the bonding strength between precast hollow slab two plate faces, prevent its dislocation in lifting and installation process from damaging.
On the basis of above-described embodiment, in another embodiment of the utility model, as shown in Figure 5, described enclosing cover 4 end can be provided with keeper 40, and described keeper 40 is arranged at bottom enclosing cover 4 edge or enclosing cover 4.So, when enclosing cover 4 end is provided with keeper 40, described keeper 40 is arranged at bottom enclosing cover 4 edge or enclosing cover 4, in application process, pore-forming pipe can be fixed in the moulding form of precast hollow slab by keeper 40, the situation preventing pore-forming tube end from causing hollowcore slab internal construction and project organization not to conform at mould internal shift occurs, fully ensure that the quality of precast hollow slab.
On the basis of above-described embodiment, in another embodiment of the utility model, as depicted in figs. 1 and 2, described projection 2 can be arranged on two relative faces of body 1.So, projection 2 is arranged on two relative faces of body 1, in application process, projection 2 can be arranged at the reinforcing bar of its both sides or steel wire or precast hollow board forming die supporting and location, and after multiple pore-forming pipe arrangement, projection 2 cooperatively interacts, and can play shaping effect of blocking, prevent the concrete of precast hollow slab both sides completely through, serve the effect reducing concrete heat bridge.
On the basis of above-described embodiment, in another embodiment of the utility model, described projection 2 can be arranged on four faces of body 1.So, when on four faces that projection 2 is arranged at body 1, projection 2 can be arranged at the reinforcing bar of its both sides or steel wire or precast hollow board forming die supporting and location, simultaneously, after multiple pore-forming pipe arrangement, projection 2 cooperatively interacts, and can play and block shaping effect, prevent the concrete of precast hollow slab both sides completely through, serve the effect reducing concrete heat bridge.
On the basis of above-described embodiment, in another embodiment of the utility model, the material of described body 1 is plastics, projection 2 global formation that described body 1 and external surface thereof are arranged.So, when the material of body 1 is plastics, during projection 2 global formation that described body 1 and external surface thereof are arranged, pore-forming pipe is manufactured convenient and simple, pipe thickness can strictly control, and the bonding strength between projection 2 and body 1 is good, be not easy damage to come off, fully ensure that the quality of pore-forming pipe.
On the basis of above-described embodiment, in another embodiment of the utility model, as shown in Figure 3, described projection 2 shifts to install on relative two faces of body 1.So, when projection 2 shifts to install on relative two faces of body 1, in application process, after multiple pore-forming pipe arrangement, the projection 2 shifted to install complements each other to form and blocks, and can reduce producting process difficulty, is conducive to reducing costs, raises the efficiency.
The above is only preferred embodiment of the present utility model; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (13)
1. precast hollow slab buries a core pore-forming pipe, comprises body, it is characterized in that, described body is through hollow section, and outer surface of tube body is provided with at least one projection, and described projection is provided with positioner.
2. precast hollow slab according to claim 1 buries core pore-forming pipe, it is characterized in that, described projection longitudinal separation spread configuration is in tube surfaces.
3. precast hollow slab according to claim 1 buries core pore-forming pipe, it is characterized in that, described body cross section is rectangle.
4. precast hollow slab according to claim 3 buries core pore-forming pipe, it is characterized in that, described tube wall is provided with at least one transverse concave groove.
5. precast hollow slab according to claim 3 buries core pore-forming pipe, it is characterized in that, described body is provided with at least one align member.
6. precast hollow slab according to claim 5 buries core pore-forming pipe, it is characterized in that, described positioner is groove.
7. precast hollow slab according to claim 6 buries core pore-forming pipe, it is characterized in that, described groove is into the large groove of young endoporus.
8. precast hollow slab according to claim 6 buries core pore-forming pipe, it is characterized in that, at least one end of described body is provided with enclosing cover, and body is closed into blind pipe or closed hollow pipe by described enclosing cover.
9. precast hollow slab according to claim 8 buries core pore-forming pipe, it is characterized in that, described enclosing cover end is provided with keeper, and described keeper is arranged at enclosing cover edge or cover bottom portion.
10. precast hollow slab according to any one of claim 1 to 5 buries core pore-forming pipe, it is characterized in that, described projection is arranged on two relative faces of body.
11. precast hollow slabs according to any one of claim 1 to 5 bury core pore-forming pipe, it is characterized in that, described projection is arranged on four faces of body.
12. precast hollow slabs according to any one of claim 1 to 5 bury core pore-forming pipe, it is characterized in that, the material of described body is plastics, the projection global formation that described body and external surface thereof are arranged.
13. precast hollow slabs according to claim 10 bury core pore-forming pipe, it is characterized in that, described projection shifts to install on relative two faces of body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520774781.XU CN205153293U (en) | 2015-09-30 | 2015-09-30 | Hollow core slab buries core pore -forming pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520774781.XU CN205153293U (en) | 2015-09-30 | 2015-09-30 | Hollow core slab buries core pore -forming pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205153293U true CN205153293U (en) | 2016-04-13 |
Family
ID=55689005
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520774781.XU Expired - Fee Related CN205153293U (en) | 2015-09-30 | 2015-09-30 | Hollow core slab buries core pore -forming pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205153293U (en) |
-
2015
- 2015-09-30 CN CN201520774781.XU patent/CN205153293U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Zhongmin Zhuyou Technology Investment Co.,Ltd. Assignor: Zhongmin Zhuyou Co.,Ltd. Contract record no.: 2017430000027 Denomination of utility model: Prefabricated hollow slab core-buried pore-forming pipe Granted publication date: 20160413 License type: Exclusive License Record date: 20171222 |
|
| EC01 | Cancellation of recordation of patent licensing contract | ||
| EC01 | Cancellation of recordation of patent licensing contract |
Assignee: Zhongmin Zhuyou Technology Investment Co.,Ltd. Assignor: Zhongmin Zhuyou Co.,Ltd. Contract record no.: 2017430000027 Date of cancellation: 20180801 |
|
| EE01 | Entry into force of recordation of patent licensing contract | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: China Civil Architecture Friends Technology (Jiaozhou) Co.,Ltd. Assignor: Zhongmin Zhuyou Technology Investment Co.,Ltd. Contract record no.: 2018430000023 Denomination of utility model: Prefabricated hollow slab core-buried pore-forming pipe Granted publication date: 20160413 License type: Common License Record date: 20190102 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160413 |