CN100423809C - Plate type and two surface filtration type micro-porous ceramic structure - Google Patents
Plate type and two surface filtration type micro-porous ceramic structure Download PDFInfo
- Publication number
- CN100423809C CN100423809C CNB2006100084337A CN200610008433A CN100423809C CN 100423809 C CN100423809 C CN 100423809C CN B2006100084337 A CNB2006100084337 A CN B2006100084337A CN 200610008433 A CN200610008433 A CN 200610008433A CN 100423809 C CN100423809 C CN 100423809C
- Authority
- CN
- China
- Prior art keywords
- porous ceramic
- ceramic structure
- surface filtration
- type micro
- plate type
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000000919 ceramic Substances 0.000 title claims abstract description 85
- 238000001914 filtration Methods 0.000 title claims abstract description 48
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 46
- 239000000463 material Substances 0.000 claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 17
- 238000005245 sintering Methods 0.000 claims description 4
- 239000012945 sealing adhesive Substances 0.000 claims description 3
- 238000010304 firing Methods 0.000 claims description 2
- 238000004140 cleaning Methods 0.000 abstract description 5
- 238000001354 calcination Methods 0.000 abstract 1
- 230000009977 dual effect Effects 0.000 abstract 1
- 238000007789 sealing Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 5
- 239000012065 filter cake Substances 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000003403 water pollutant Substances 0.000 description 1
Images
Landscapes
- Filtering Materials (AREA)
Abstract
A plate-shaped millipore ceramic structure with dual filtering surfaces for cleaning water by high filtering throughput is prepared through making a reticular porous plate with the material able to be converted to gas at high temp putting it in the ceramic blank, and high-temp calcining to gasify said plate to form the reticular channels.
Description
Technical field
The present invention relates to the purifier technical field, relate in particular to a kind of plate type and two surface filtration type micro-porous ceramic structure.
Background technology
Micropore ceramics as filtering material use in the water treatment facilities, because of possessing lot of advantages, for example cost is lower, can conveniently clean after the obstruction, flow is all replied basically after cleaning, and filtering accuracy does not descend, and filter process can keep water stabilization from start to finish, or the like, so be used widely at present.
The micropore ceramics that uses in the water treatment facilities is made generally in tabular, tubulose or hemispherical.Current enter from a side during filtration, flow out from another side, and pollutant is blocked in an into side surface of water, and on this surface deposition or gather and form filter cake.Carrying out along with filter process, filter cake thickness is more and more thicker, filtration resistance is increasing, though effluent characteristics can not descend, but water flow is more and more littler, final flow can not meet the demands, and at this moment needs micropore ceramics is cleaned to remove the pollutant or the filter cake of ceramic surface, recovers filtering traffic.People wish to be the bigger the better from beginning to be filled into the water yield that cleaning filters during this period of time, in other words, if filtering traffic is certain, wish can normal filtration the longer the better time.This is actually the water environment capacity that has reflected micropore ceramics, and water environment capacity is big, promptly the cleaning frequency long, or the drainage amount is big in given filter cycle.And water environment capacity is directly related with filter area, and promptly filter area is big more, and water environment capacity is big more.
For the tubulose micropore ceramics, a kind of method is to increase filter area by the radical that increases micropore ceramic tube, device structure complexity like this, and cost is higher; Another kind method is to increase filter area by the diameter that increases micropore ceramic tube, and the space in the micropore ceramic tube just wastes like this, and it is very huge that equipment will become.Obviously, such two kinds of methods all make equipment manufacturing cost obviously rise.
For plate shaped micropore ceramic, a kind of method is directly to increase the plate area, for example increase the diameter of circular plate type micropore ceramics, be that too large diameter capillary ceramic plate fabrication yield is lower on the one hand, and install and use and all be easier to damage, be that diameter means that greatly promptly equipment volume is big on the other hand, increase capillary ceramic plate Method for Area will make the device fabrication cost rise comparatively fast so adopt directly; Another kind method is to connect dividing plate with two micropore ceramics conglutinates by one, the excircle upper and lower surface that connects dividing plate is tightly connected with circular micropore ceramics respectively, the centre that connects dividing plate is provided with the adapter of passing one of them potsherd center, and this adapter and this potsherd are tightly connected, a kind of micropore ceramic filter element structure as Chinese patent water purifier micropore ceramic filter element (number of patent application is 200520000553.3) has disclosed.This physical dimension is compact, increases under the less prerequisite at volume, and flow is obviously increased, still, this ceramic component structure more complicated, reliability decrease, production cost is higher.
Summary of the invention
Technical problem to be solved by this invention is that a kind of purifier plate type and two surface filtration type micro-porous ceramic structure and manufacture method thereof are provided at above-mentioned prior art present situation, main effect of the present invention is to guarantee that filtering accuracy does not reduce, and increase under the less prerequisite at the volume of two-face filtering micropore ceramic filtering traffic significantly increased, thus make filter plant can design volume less, cost is lower.
The present invention solves the problems of the technologies described above the technical scheme that is adopted: this plate type and two surface filtration type micro-porous ceramic structure comprises a tabular homogeneous micropore ceramics, the periphery of this pottery can be circular, also can be oval, it also can be polygon, it can be tabular, also can be that cambered surface is tabular, also can be that sphere is tabular, its centre at thickness direction has and is interconnected and with upper surface, lower surface and periphery the netted flow-guiding channel of certain distance is arranged all, and its middle part is provided with the through hole that can assemble water conservancy diversion core pipe.Described netted flow-guiding channel can have multiple mesh shape, for example can be triangle, also can be polygon, also can be circular, also can be other any irregular shape, but must be communicated with each other, compile and make it flow to the purpose of water conservancy diversion core pipe to reach the current that will filter.Described water conservancy diversion core pipe upper end closed, the lower end is uncovered, screw thread is arranged at top, the bottom is provided with the convex shoulder that can compress sealing gasket and can assembles the groove of O-ring seals, the tube wall at middle part is provided with the small through hole that communicates with netted flow-guiding channel, and it passes through upper and lower sealing gasket and the compressing tablet screwing force lower seal at nut with plate shaped micropore ceramic.Described compressing tablet is contained on the sealing gasket and has the shape that the sealing gasket Free Transform is gone up in restriction.
The through hole at described tabular homogeneous micropore ceramics middle part also can be replaced by blind hole, at this moment the water conservancy diversion core pipe with another kind of structure is located at the blind hole place, this core pipe is sealing adhesive by annular convex shoulder on it and tabular homogeneous micropore ceramics and is integral, and its underpart is provided with the groove that can assemble O-ring seals.Described water conservancy diversion core pipe also can adopt with the manufacturing of described two surface filtration type micro-porous ceramic structure identical materials and with it and become one.
The middle part of described tabular homogeneous micropore ceramics can not have the hole yet, at this moment water conservancy diversion core pipe is arranged on the edge of tabular homogeneous micropore ceramics, this water conservancy diversion core pipe has can be reliably by the structure of bonding and sealing with tabular homogeneous micropore ceramics, and its underpart is provided with the groove that can assemble O-ring seals.Described water conservancy diversion core pipe also can adopt with the manufacturing of micropore ceramics identical materials and with described tabular homogeneous micropore ceramics and become one.
Two surface filtration type micro-porous ceramic structure of the present invention is connected with water treatment facilities by the core pipe, connecting hole inner wall sealing on O shape circle on the core pipe and the equipment.When drainage, current enter micropore ceramics from two surfaces and the side of plate shaped micropore ceramic, flow to water conservancy diversion core pipe after current compile in netted flow-guiding channel, flow out from the core pipe again.Along with the carrying out of filter process, ceramic outer surface is stopped up gradually by water pollutant, at this moment two surface filtration type micro-porous ceramic structure can be pulled down from equipment, can recover filtering traffic after the cleaning, and can keep filtering accuracy not reduce, and effluent quality is constant.
The manufacture method of described plate type and two surface filtration type micro-porous ceramic structure is:
1, is used in the material (for example plastics) that can be converted into gas under the ceramic sintering temperature earlier and makes reticulate perforation plate;
2, when making the plate type and two surface filtration type micro-porous ceramic structure blank, this reticulate perforation plate is inserted in the middle of the blank, except that the position that water conservancy diversion core pipe is set, all the other positions must guarantee that there is certain distance on this reticulate perforation plate and ceramic batch surface, can adopt casting to make blank, also can adopt pressing to make blank;
3, high-temperature firing plate type and two surface filtration type micro-porous ceramic structure blank, reticulate perforation plate wherein change into the space that stays after gas disappears and just form netted flow-guiding channel.
Description of drawings
Fig. 1 is the structural representation of this embodiment of the invention one.
Fig. 2 is the A-A cutaway view of Fig. 1.
Current schematic diagram when Fig. 3 is the embodiment of the invention one drainage.
Fig. 4 is the structural representation of this embodiment of the invention two.
Fig. 5 is the structural representation of this embodiment of the invention three.
Fig. 6 is the structural representation of this embodiment of the invention four.
Fig. 7 is the A-A cutaway view of Fig. 6.
Fig. 8 is the structural representation of this embodiment of the invention five.
Fig. 9 is the A-A cutaway view of Fig. 8.
Figure 10 is the reticulate perforation plate structural representation.
The specific embodiment
Describe the present invention below in conjunction with concrete accompanying drawing, but be to be understood that the detailed description does not here constitute limiting the scope of the invention.
Embodiment one: in conjunction with Fig. 1, Fig. 2 and shown in Figure 3, plate type and two surface filtration type micro-porous ceramic structure of the present invention (1) has in the centre of thickness direction and is interconnected and with upper surface, lower surface and periphery the netted flow-guiding channel (2) of certain distance is arranged all, and its middle part is provided with the through hole that can assemble water conservancy diversion core pipe (4).The netted figure of triangle among Fig. 2 is the schematic diagram of this netted passage, and the netting twine place among the figure is the water stream channel that certain space is arranged, and the mesh place is a micropore ceramics.The shape of mesh can be triangle, polygon, circle or Any shape, but must be interconnected.Described water conservancy diversion core pipe (4) upper end closed, the lower end is uncovered, screw thread (5) is arranged at top, the bottom is provided with the convex shoulder (8) that can compress sealing gasket (10) and can assembles the groove of O-ring seals (9), the tube wall at middle part is provided with the small through hole (11) that communicates with netted flow-guiding channel (2), itself and plate type two-face filtering micropore ceramic (1) are by upper and lower sealing gasket (3,10) and compressing tablet (7) the screwing force lower seal at nut (6).Described compressing tablet (7) is pressed on the sealing gasket (3) and has the shape that sealing gasket (3) Free Transform is gone up in restriction.Current pass micropore ceramics and enter netted flow-guiding channel (2) and compiling therein during filtration from the outside of micropore ceramics (1), flow to water conservancy diversion core pipe (4) again, and Fig. 3 is that it flows to schematic diagram.
Embodiment two: in conjunction with shown in Figure 4, plate type and two surface filtration type micro-porous ceramic structure of the present invention (1) is provided with the netted flow-guiding channel (2) that is interconnected in the centre of thickness direction, and its middle part is provided with the blind hole that can assemble water conservancy diversion core pipe (13); The upper port of described water conservancy diversion core pipe (13) communicates with described netted flow-guiding channel (2), the bottom is provided with convex shoulder (8) and can assembles the groove of O-ring seals (9), and the layer (12) that is sealing adhesive that both firmly can be linked into an integrated entity is arranged between the upper surface of convex shoulder (8) and plate type and two surface filtration type micro-porous ceramic structure (1).The requirement of described netted flow-guiding channel (2) is identical with embodiment one.
Embodiment three: in conjunction with shown in Figure 5, present embodiment is that water conservancy diversion core pipe (14) is also adopted and described two surface filtration type micro-porous ceramic structure (1) identical materials manufacturing, water conservancy diversion core pipe (14) and tabular homogeneous micropore ceramics (1) are become one, core pipe (14) is provided with the groove that can assemble O-ring seals (9), the requirement of netted flow-guiding channel (2) and water conservancy diversion core pipe (14) that the position is set is all identical with embodiment two.
Embodiment four: in conjunction with Fig. 6 and shown in Figure 7, the water conservancy diversion core pipe (15) of present embodiment is located at the edge of tabular homogeneous microporous ceramic structure (1), described water conservancy diversion core pipe (15) has with tabular homogeneous microporous ceramic structure (1) and can be reliably both are firmly linked into an integrated entity and can make the structure of tack coat (12) positiver sealing by bonding, and its underpart is provided with the groove that can assemble O-ring seals (9); Described plate type and two surface filtration type micro-porous ceramic structure (1) has in the centre of thickness direction and is interconnected and with upper surface, lower surface and periphery the netted flow-guiding channel (2) of certain distance is arranged all.Hexagon web among Fig. 7 is the schematic diagram of this netted passage (2), and the netting twine place among the figure is the water stream channel that certain space is arranged, and the mesh place is a micropore ceramics.
Embodiment five: in conjunction with Fig. 8 and shown in Figure 9, present embodiment is that water conservancy diversion core pipe (16) is also adopted and described two surface filtration type micro-porous ceramic structure (1) identical materials manufacturing, water conservancy diversion core pipe (16) and tabular homogeneous microporous ceramic structure (1) are become one, core pipe (16) is provided with the groove that can assemble O-ring seals (9), being provided with of netted flow-guiding channel (2) require and water conservancy diversion core pipe (16) that the position is set is all identical with embodiment four.Hexagon web among Fig. 9 is the schematic diagram of this netted passage, and the netting twine place among the figure is the water stream channel that certain space is arranged, and the mesh place is a micropore ceramics.
Below in conjunction with Figure 10 the manufacture method of tabular homogeneous microporous ceramic structure is described in detail.Figure 10 is the orifice plate that is used to make the tabular homogeneous microporous ceramic structure of embodiment 1, embodiment 2 or embodiment 3, and its material adopts polypropylene plastics manufacturing, also can adopt other material manufacturing that can be converted into gas under the ceramic sintering temperature.Mesh among the figure (18) is an open-work, and its shape can be hexagon, also can be other Any shape, but the plastics muscle of forming mesh (18) must interconnect, and must not be interrupted; Mesopore (17) is an open-work, and its shape can be circular, also can be other shape.Concrete steps are as follows:
1, make reticulate perforation plate shown in Figure 10 earlier, thickness is 1 millimeter～2 millimeters;
2, diatomite, clay etc. are mixed by a certain percentage, and stir, add an amount of water furnishing " pug " then;
3, the plate type and two surface filtration type micro-porous ceramic structure blank is poured into a mould or be pressed into to above-mentioned " pug ", above-mentioned reticulate perforation plate is inserted in the middle of the blank simultaneously, mesopore (17) is used for fixing the orifice plate position, with surface and the side that guarantees this reticulate perforation plate and ceramic batch certain distance is arranged all;
4, fire the plate type and two surface filtration type micro-porous ceramic structure blank under 800 ℃～1300 ℃ high temperature, in sintering procedure, reticulate perforation plate wherein changes into the space that stays after gas disappears and just forms netted flow-guiding channel.
The manufacture method of the tabular homogeneous microporous ceramic structure among embodiment four and the embodiment five and the manufacture method of foregoing description are basic identical.Difference is: as shown in figure 10, described reticulate perforation plate cancellation mesopore (17), changing circular orifice is the rectangle orifice plate, to adapt to the requirement that water conservancy diversion core pipe is arranged on easily the edge of tabular homogeneous microporous ceramic structure.The manufacture method of all the other and foregoing description is identical.
Claims (7)
1. a purifier is with the manufacture method of plate type and two surface filtration type micro-porous ceramic structure, it is characterized in that: adopt the material that under the ceramic sintering temperature, can be converted into gas to make reticulate perforation plate, when making ceramic batch described reticulate perforation plate is inserted in the middle of the blank, described reticulate perforation plate is converted into gas when high-temperature firing and the left space, back that disappears just forms netted flow-guiding channel.
2. purifier plate type and two surface filtration type micro-porous ceramic structure is characterized in that: described plate type and two surface filtration type micro-porous ceramic structure is provided with in the centre of thickness direction and is interconnected and with upper surface and lower surface the netted flow-guiding channel of certain distance is arranged all.
3. according to the described plate type and two surface filtration type micro-porous ceramic structure of claim 2, it is characterized in that: be provided with the through hole that can assemble water conservancy diversion core pipe in the middle of the described plate type and two surface filtration type micro-porous ceramic structure.
4. according to the described plate type and two surface filtration type micro-porous ceramic structure of claim 2, it is characterized in that: be provided with the blind hole that to assemble water conservancy diversion core pipe in the middle of the described plate type and two surface filtration type micro-porous ceramic structure.
5. according to the described plate type and two surface filtration type micro-porous ceramic structure of claim 2, it is characterized in that: the edge of described plate type and two surface filtration type micro-porous ceramic structure is provided with the structure that can assemble water conservancy diversion core pipe.
6. according to the described plate type and two surface filtration type micro-porous ceramic structure of claim 2, it is characterized in that: described plate type and two surface filtration type micro-porous ceramic structure is provided with identical with self material and and the water conservancy diversion core pipe that self becomes one.
7. according to the described plate type and two surface filtration type micro-porous ceramic structure of claim 2, it is characterized in that: described plate type and two surface filtration type micro-porous ceramic structure is provided with inequality and by being sealing adhesive with the water conservancy diversion core pipe that self becomes one with self material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100084337A CN100423809C (en) | 2006-01-21 | 2006-01-21 | Plate type and two surface filtration type micro-porous ceramic structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100084337A CN100423809C (en) | 2006-01-21 | 2006-01-21 | Plate type and two surface filtration type micro-porous ceramic structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101002994A CN101002994A (en) | 2007-07-25 |
| CN100423809C true CN100423809C (en) | 2008-10-08 |
Family
ID=38702507
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100084337A Expired - Fee Related CN100423809C (en) | 2006-01-21 | 2006-01-21 | Plate type and two surface filtration type micro-porous ceramic structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100423809C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104001374B (en) * | 2014-05-30 | 2016-08-24 | 成都易态科技有限公司 | Sintered porous material screen plate and for preparing the prefabricated hollow slab of this screen plate |
| CN104147871B (en) * | 2014-07-31 | 2016-03-02 | 成都易态科技有限公司 | Filter and filter thereof |
-
2006
- 2006-01-21 CN CNB2006100084337A patent/CN100423809C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101002994A (en) | 2007-07-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5231304B2 (en) | Alumina porous body and method for producing the same | |
| CN100402124C (en) | Filter plate | |
| CN100423809C (en) | Plate type and two surface filtration type micro-porous ceramic structure | |
| JP4800646B2 (en) | Ceramic filter and manufacturing method thereof | |
| CN103962014A (en) | Manufacturing method of honeycombed bundling-hole hollow plate type ceramic overall film component | |
| JP5597579B2 (en) | Membrane element, membrane module, and method for manufacturing membrane element | |
| WO2015072513A1 (en) | Filtration element, module, component, and treatment unit | |
| CN201044887Y (en) | Novel slab-shaped tow-sided filtration microporous ceramic | |
| CN204159228U (en) | A kind of thin-walled multichannel tubular type inorganic membrane element with guiding gutter | |
| CN201394386Y (en) | Double-sided filter-plate-shaped micro-porous ceramic | |
| CN102000512B (en) | External pressing type loop-free solid-liquid separation dynamic membrane device | |
| CN201067674Y (en) | Inner support capillary filtering film | |
| CN201023010Y (en) | High-precision big flow microporous ceramic pipe | |
| CN101805058B (en) | Single-pipe external-compression type mechanical-circulation forced-cross flow solid and liquid-separating dynamic membrane system and device | |
| KR100712943B1 (en) | Ceramic filter | |
| CN201906564U (en) | External compression type loop-free solid-liquid separation dynamic membrane device | |
| CN207119259U (en) | Filter element device | |
| CN100528286C (en) | Plate microporous ceramic structure with convex rib | |
| EP1607129A1 (en) | Ceramic filter | |
| CN2894794Y (en) | Plate type two-side filtering microporous ceramic | |
| CN201410340Y (en) | Micropore hollow self-support multistage filter plate | |
| KR100671380B1 (en) | Ceramic filter | |
| CN101780349B (en) | Multi-pipe external-compression type mechanical circulation forced cross flow solid-liquid separation dynamic membrane system and device | |
| CN201030266Y (en) | Plate-like micro-porous ceramic structure with convex ribs | |
| CN201613113U (en) | Dynamic membrane system for single-pipe external compression type mechanical circulation forced cross-flow solid-liquid separation and device thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Ningbo Dukang Ceramics Co., Ltd. Assignor: Du Jianyao Contract fulfillment period: 2008.9.28 to 2026.1.20 Contract record no.: 2008330001270 Denomination of invention: Plate type and two surface filtration type micro-porous ceramic structure Granted publication date: 20081008 License type: Exclusive license Record date: 20081022 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.9.28 TO 2026.1.20; CHANGE OF CONTRACT Name of requester: NINGBO DUKANG CERAMICS CO., LTD. Effective date: 20081022 |
|
| ASS | Succession or assignment of patent right |
Owner name: NINGBO DUKANG CERAMIC CO., LTD. Free format text: FORMER OWNER: DU JIANYAO Effective date: 20110922 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 315316 NINGBO, ZHEJIANG PROVINCE TO: 315338 NINGBO, ZHEJIANG PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20110922 Address after: 315338 Zhejiang city of Cixi province the CiDong Industrial Zone Ningbo road Dukang Ceramic Co. Patentee after: Ningbo Dukang Ceramics Co., Ltd. Address before: Xing Village 315316 Zhejiang province Cixi Guanhaiwei Zhenming Cixi Dukang Ceramic Co. Ltd. Patentee before: Du Jianyao |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081008 Termination date: 20190121 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |