CN108053906A - It is a kind of for radiation protection block of neutron scientific research and preparation method thereof - Google Patents
It is a kind of for radiation protection block of neutron scientific research and preparation method thereof Download PDFInfo
- Publication number
- CN108053906A CN108053906A CN201711335112.2A CN201711335112A CN108053906A CN 108053906 A CN108053906 A CN 108053906A CN 201711335112 A CN201711335112 A CN 201711335112A CN 108053906 A CN108053906 A CN 108053906A
- Authority
- CN
- China
- Prior art keywords
- block
- radiation protection
- grains
- scientific research
- concrete
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F1/00—Shielding characterised by the composition of the materials
- G21F1/12—Laminated shielding materials
- G21F1/125—Laminated shielding materials comprising metals
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F1/00—Shielding characterised by the composition of the materials
- G21F1/02—Selection of uniform shielding materials
- G21F1/04—Concretes; Other hydraulic hardening materials
- G21F1/042—Concretes combined with other materials dispersed in the carrier
- G21F1/047—Concretes combined with other materials dispersed in the carrier with metals
Abstract
The present invention relates to radiation proof material fields, more particularly to a kind of radiation protection block for neutron scientific research, it includes the concrete block set gradually according to grains of sand specification, the quantity of the concrete block is no less than 3 pieces, and thickness increases with the increase of the specification of the grains of sand, it is provided between adjacent concrete block by their glued plastic layers, and steel plate is provided on the outside of the combination block after gluing；The object of the present invention is to provide a kind of for radiation protection block of neutron scientific research and preparation method thereof, it carries out by plastic cement composing combination block using the concrete block of multilayer difference grains of sand specification, and steel plate is set outside it, it can targetedly be protected according to the penetration capacity of a variety of radiation sources, and then the effect for saving Cost of Concrete can be played.
Description
Technical field
The present invention relates to radiation proof material field more particularly to a kind of radiation protection blocks and its system for neutron scientific research
Preparation Method.
Background technology
Neutron science is a kind of subject of high technology content, embodies a national scientific and technological level, neutron scientific research
Comprising many contents, such as collision, the fusion etc. of neutron, the research of neutron science mostly all can with and radiation, therefore must
Radiation protection space must be built to ensure the safety of researcher, existing radiation protection space is taken with radiation protection block mostly
It builds, radiation protection block is all made of, existing radiation protection mostly the metallic plate of concrete block and outer layer covers (steel plate, copper coin etc.)
All it is to be formed using the grains of sand of same specification granular size mostly with concrete block, such as using fine sand, concrete block can be caused
Cost increases, such as using coarse sand, it is necessary to which thicker concrete block can play good radiation-proof effect.
The content of the invention
The object of the present invention is to provide a kind of for radiation protection block of neutron scientific research and preparation method thereof, using multilayer
The concrete block of different grains of sand specifications carries out composing combination block by plastic cement, and steel plate is set outside it, can be according to more
The penetration capacity of kind radiation source is targetedly protected, and then can play the effect for saving Cost of Concrete.
In order to achieve the goal above, the technical solution adopted by the present invention is：A kind of radiation protection for neutron scientific research
Block, it includes the concrete block (2) set gradually according to grains of sand specification, and the quantity of the concrete block (2) is no less than 3 pieces,
And thickness increases with the increase of the specification of the grains of sand, is provided between adjacent concrete block (2) by their glued plastic layers
(2), steel plate (1) is provided on the outside of the combination block and after gluing.
Preferably, wall joint filling glue-line (4), the wall are provided on the outside of the concrete block (2) of grains of sand specification minimum
The outside of body joint filling glue-line (4) is steel plate layer (1).
Preferably, the heat resisting temperature of the plastic layer (3) is not more than 80 DEG C, and injection has zinc powder in plastic layer (3).
Preferably, it is also filled with copper particle in the concrete block (2).
Another technical solution of the present invention：A kind of preparation method of radiation protection block for neutron scientific research, it is wrapped
Include following steps：
1., concrete grout configuration, first pass through the grains of sand of different size, cement prepare different size concrete grout it is standby
With；
2., combination block prepare, the mixed mud of the grains of sand minimum slurry is injected into the mold that outside can heat, then by it
Top smoothes out, and puts last layer plastic layer afterwards, and then the mixed mud slurry of next grains of sand specification is injected on plastic layer again, and
Its upper part is smoothed out, puts last layer plastic layer afterwards, injects subsequent concrete grout and plastic layer, top layer according to the method described above
Concrete grout top need not place plastic layer, mold is heated by the heating unit of mold exterior afterwards, is made in mold
Temperature reaches 80-120 DEG C, makes its natural cooling after heating 8-15min, removes mold afterwards, combination block is taken out；
3., assembling, 2. combination block that step is obtained be put into corresponding size steel plate set in obtain radiation protection block.
Preferably, the copper of the grains of sand equivalent specifications with selecting is added in 1. step carries out the preparation process of concrete grout
Grain.
Preferably, 2. plastic layer used is to add in zinc powder in the molten state by plastic cement to smooth out cooling by stirring to step
What shaping obtained.
Preferably, 2. combination block that step obtains is taken out in joint filling mold of putting upside down, then again on the top of combination block
Liquid wall gap-filling glue is injected, is drawn off carrying out the behaviour of step 3. when the natural coagulation of walls gap-filling glue is into wall joint filling glue-line
Make.
Beneficial effects of the present invention are：
1st, carry out composing combination block by plastic cement using the concrete block of multilayer difference grains of sand specification, and set outside it
Steel plate is put, can targetedly be protected according to the penetration capacity of a variety of radiation sources, and then saving concrete can be played
The effect of cost.
2nd, wall joint filling glue-line is arranged on the outside of the mixed mud block of grains of sand minimum, and when in use, this block concrete block also exists
Outer layer can prevent radiant matter from completely penetrating through concrete block by wall joint filling glue-line, moreover it is possible to by way of heating to
Concrete block long is squeegeeed, and further improves the effect of radiation protection.
3rd, the injection of the zinc powder in plastic layer can make plastic layer be likewise supplied with the effect of radiation protection, and then can reduce
The thickness of concrete layer.
4th, the design of the copper particle in concrete block can increase the radiation-proof effect of concrete block, and then can reduce mixed
The thickness of solidifying soil block.
5th, the preparation method time of radiation shield concrete block is ingenious, and multilayer coagulation can be made by way of hot melt plastic glue-line
Soil block is good to be combined, while the gap that generated during concrete formation can also be filled up, it is ensured that is made
Concrete block possess good using effect.
6th, the formation of wall joint filling glue-line is ingenious, can perfectly adapt to the size of combination block, while can also make gap-filling glue
It penetrates into concrete block, the gap generated when being molded to concrete block is repaired.
Description of the drawings
Fig. 1 is a kind of structure diagram of radiation protection block for neutron scientific research.
Label character is expressed as shown in figure：1st, steel plate；2nd, concrete block；3rd, plastic layer；4th, wall joint filling glue-line.
Specific embodiment
In order to which those skilled in the art is made to more fully understand technical scheme, the present invention is retouched in detail below
It states, the description of this part is only exemplary and explanatory, should not there is any restriction effect to protection scope of the present invention.
Embodiment 1
A kind of preparation method of radiation protection block for neutron scientific research, it includes the following steps：
1., concrete grout configuration, the grains of sand, copper particle, cement for first passing through different size prepare the concrete of different size
It starches spare；
2., combination block prepare, the mixed mud of the grains of sand minimum slurry is injected into the mold that outside can heat, then by it
Top smoothes out, and puts last layer plastic layer afterwards, and then the mixed mud slurry of next grains of sand specification is injected on plastic layer again, and
Its upper part is smoothed out, puts last layer plastic layer afterwards, injects subsequent concrete grout and plastic layer, top layer according to the method described above
Concrete grout top need not place plastic layer, mold is heated by the heating unit of mold exterior afterwards, is made in mold
Temperature reaches 80 DEG C, makes its natural cooling after heating 15min, removes mold afterwards, combination block is taken out；
3., the shaping of wall joint filling glue-line, the taking-up of 2. combination block that step obtains is put upside down in joint filling mold, Ran Houzai
Liquid wall gap-filling glue is injected on the top of combination block, is taken when the natural coagulation of walls gap-filling glue is into wall joint filling glue-line
Go out；
4., assembling, 3. combination block that step is obtained be put into corresponding size steel plate set in obtain radiation protection block.
Wherein 2. plastic layer used is to add in zinc powder in the molten state by plastic cement and smooth out by stirring to be cooled to step
What type obtained.
Embodiment 2
A kind of preparation method of radiation protection block for neutron scientific research, it includes the following steps：
1., concrete grout configuration, the grains of sand, copper particle, cement for first passing through different size prepare the concrete of different size
It starches spare；
2., combination block prepare, the mixed mud of the grains of sand minimum slurry is injected into the mold that outside can heat, then by it
Top smoothes out, and puts last layer plastic layer afterwards, and then the mixed mud slurry of next grains of sand specification is injected on plastic layer again, and
Its upper part is smoothed out, puts last layer plastic layer afterwards, injects subsequent concrete grout and plastic layer, top layer according to the method described above
Concrete grout top need not place plastic layer, mold is heated by the heating unit of mold exterior afterwards, is made in mold
Temperature reaches 120 DEG C, makes its natural cooling after heating 8min, removes mold afterwards, combination block is taken out；
3., the shaping of wall joint filling glue-line, the taking-up of 2. combination block that step obtains is put upside down in joint filling mold, Ran Houzai
Liquid wall gap-filling glue is injected on the top of combination block, is taken when the natural coagulation of walls gap-filling glue is into wall joint filling glue-line
Go out；
4., assembling, 3. combination block that step is obtained be put into corresponding size steel plate set in obtain radiation protection block.
Wherein 2. plastic layer used is to add in zinc powder in the molten state by plastic cement and smooth out by stirring to be cooled to step
What type obtained.
Embodiment 3
A kind of preparation method of radiation protection block for neutron scientific research, it includes the following steps：
1., concrete grout configuration, the grains of sand, copper particle, cement for first passing through different size prepare the concrete of different size
It starches spare；
2., combination block prepare, the mixed mud of the grains of sand minimum slurry is injected into the mold that outside can heat, then by it
Top smoothes out, and puts last layer plastic layer afterwards, and then the mixed mud slurry of next grains of sand specification is injected on plastic layer again, and
Its upper part is smoothed out, puts last layer plastic layer afterwards, injects subsequent concrete grout and plastic layer, top layer according to the method described above
Concrete grout top need not place plastic layer, mold is heated by the heating unit of mold exterior afterwards, is made in mold
Temperature reaches 100 DEG C, makes its natural cooling after heating 11min, removes mold afterwards, combination block is taken out；
3., the shaping of wall joint filling glue-line, the taking-up of 2. combination block that step obtains is put upside down in joint filling mold, Ran Houzai
Liquid wall gap-filling glue is injected on the top of combination block, is taken when the natural coagulation of walls gap-filling glue is into wall joint filling glue-line
Go out；
4., assembling, 3. combination block that step is obtained be put into corresponding size steel plate set in obtain radiation protection block.
Wherein 2. plastic layer used is to add in zinc powder in the molten state by plastic cement and smooth out by stirring to be cooled to step
What type obtained.
Radiation protection block made from embodiment 1, embodiment 2 and embodiment 3 and existing mixed mud radiation protection block are used
In the radiation protection of neutron collision experiment, then the radiation on the outside of radiation protection block is checked, above-mentioned radiation protection block is to various anti-
Radiant matter protection is respectively provided with good effect, and with the increase of usage time, the effect of above-mentioned radiation protection block has decrease, but
It is the slow of the radiation protection block effect decrease that comparatively prepared by embodiment 1,2 and 3, afterwards again to going out by certain time use
Existing radiation-proof effect radiation protection block not up to standard used after heating again, it is found that prepared by 3 embodiments of the present invention
Radiation protection block radiation-proof effect significantly improve, the standard of radiation protection can be reached, and existing concrete radiation protection block does not have
Variation, thus it is opposite with for existing radiation shield concrete block, radiation protection block of the invention is also equipped with while cost-effective
Longer service life and the space of secondary use.
It should be noted that herein, term " comprising ", "comprising" or its any other variant are intended to non-row
His property includes, so that process, method, article or equipment including a series of elements not only include those elements, and
And it further includes other elements that are not explicitly listed or further includes as this process, method, article or equipment institute inherently
Element.
Specific case used herein is set forth the principle of the present invention and embodiment, the explanation of above example
It is only intended to help the method and its core concept for understanding the present invention.The above is only the preferred embodiment of the present invention, should
When pointing out, due to the finiteness of literal expression, and objectively there are unlimited concrete structure, for the common skill of the art
For art personnel, without departing from the principle of the present invention, several improvement, retouching or variation can also be made, can also incited somebody to action
Above-mentioned technical characteristic is combined in the right way；These improve retouching, variation or combination or the not improved structure by invention
Think and technical solution directly applies to other occasions, be regarded as protection scope of the present invention.
Claims (8)
1. a kind of radiation protection block for neutron scientific research, which is characterized in that it includes what is set gradually according to grains of sand specification
Concrete block (2), the quantity of the concrete block (2) is no less than 3 pieces, and thickness increases with the increase of the specification of the grains of sand,
It is provided between adjacent concrete block (2) by their glued plastic layers (2), and steel is provided on the outside of the combination block after gluing
Plate (1).
2. a kind of radiation protection block for neutron scientific research according to claim 1, which is characterized in that grains of sand specification is most
Wall joint filling glue-line (4) is provided on the outside of small concrete block (2), the outside of the wall joint filling glue-line (4) is steel plate
Layer (1).
A kind of 3. radiation protection block for neutron scientific research according to claim 1, which is characterized in that the plastic cement
The heat resisting temperature of layer (3) is no more than 80 DEG C, and injection has zinc powder in plastic layer (3).
A kind of 4. radiation protection block for neutron scientific research according to claim 3, which is characterized in that the coagulation
Copper particle is also filled in soil block (2).
It is 5. special such as a kind of preparation method of radiation protection block for neutron scientific research of claim 1-4 any one of them
Sign is that it includes the following steps：
1., concrete grout configuration, first pass through the grains of sand of different size, cement prepare different size concrete grout it is spare；
2., combination block prepare, the mixed mud of the grains of sand minimum slurry is injected into the mold that outside can heat, then by its upper part
Smooth out, put last layer plastic layer afterwards, then the mixed mud of next grains of sand specification slurry is injected on plastic layer again, and by its
Top smoothes out, and puts last layer plastic layer afterwards, injects subsequent concrete grout and plastic layer according to the method described above, top layer is mixed
Solidifying soil paste top need not place plastic layer, and mold is heated by the heating unit of mold exterior afterwards, makes the temperature in mold
Reach 80-120 DEG C, make its natural cooling after heating 8-15min, remove mold afterwards, combination block is taken out；
3., assembling, 2. combination block that step is obtained be put into corresponding size steel plate set in obtain radiation protection block.
6. a kind of preparation method of radiation protection block for neutron scientific research according to claim 5, which is characterized in that
The copper particle of the grains of sand equivalent specifications with selecting is added in 1. step carries out the preparation process of concrete grout.
7. a kind of preparation method of radiation protection block for neutron scientific research according to claim 5, which is characterized in that
2. plastic layer used is added in zinc powder by plastic cement and smoothes out to be cooled and shaped by stirring and obtains step in the molten state.
8. a kind of preparation method of radiation protection block for neutron scientific research according to claim 5 or 7, feature exist
In the taking-up of 2. combination block that step obtains is put upside down in joint filling mold, then injects liquid wall on the top of combination block again
Gap-filling glue is drawn off carrying out the operation of step 3. when the natural coagulation of walls gap-filling glue is into wall joint filling glue-line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711335112.2A CN108053906B (en) | 2017-12-14 | 2017-12-14 | A kind of radiation protection block and preparation method thereof for neutron scientific research |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711335112.2A CN108053906B (en) | 2017-12-14 | 2017-12-14 | A kind of radiation protection block and preparation method thereof for neutron scientific research |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108053906A true CN108053906A (en) | 2018-05-18 |
| CN108053906B CN108053906B (en) | 2019-08-06 |
Family
ID=62132168
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711335112.2A Active CN108053906B (en) | 2017-12-14 | 2017-12-14 | A kind of radiation protection block and preparation method thereof for neutron scientific research |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108053906B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109545415A (en) * | 2018-11-12 | 2019-03-29 | 东莞理工学院 | A kind of radiation protection material |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2125185U (en) * | 1992-07-15 | 1992-12-16 | 北京市木材厂 | Radiation-proof board |
| FR2711133A1 (en) * | 1993-10-14 | 1995-04-21 | Saint Gobain Vitrage Int | Antiradiation glazing |
| JP2001305278A (en) * | 2000-04-26 | 2001-10-31 | Ishikawajima Harima Heavy Ind Co Ltd | Low-activated shielding vessel |
| US20040217307A1 (en) * | 2003-03-19 | 2004-11-04 | Gesellschaft Fur Schwerionenforschung Mbh | Radiation shielding arrangement |
| CN201069665Y (en) * | 2006-12-20 | 2008-06-04 | 范就胜 | A radiation prevention plate |
| KR20090011055A (en) * | 2007-07-25 | 2009-02-02 | 지상협 | Fabric from radioactive ray shield |
| JP2011058922A (en) * | 2009-09-09 | 2011-03-24 | Japan Atomic Energy Agency | Neutron beam shielding structure and room equipped with radiation source |
| CN102496396A (en) * | 2011-11-16 | 2012-06-13 | 哈尔滨工业大学 | Rare earth/ tungsten/ polyethylene composite gradient nuclear radiation prevention material and production method thereof |
| US20120281803A1 (en) * | 2011-05-07 | 2012-11-08 | Gip International, Ltd | Neutron absorbing composite for nuclear reactor applications |
| CN106847354A (en) * | 2017-02-08 | 2017-06-13 | 扬州大学 | A kind of cladding neutron shield door leaf with water-cooling channel |
| JP2017125715A (en) * | 2016-01-12 | 2017-07-20 | 株式会社アトックス | Neutron shielding body |
-
2017
- 2017-12-14 CN CN201711335112.2A patent/CN108053906B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2125185U (en) * | 1992-07-15 | 1992-12-16 | 北京市木材厂 | Radiation-proof board |
| FR2711133A1 (en) * | 1993-10-14 | 1995-04-21 | Saint Gobain Vitrage Int | Antiradiation glazing |
| JP2001305278A (en) * | 2000-04-26 | 2001-10-31 | Ishikawajima Harima Heavy Ind Co Ltd | Low-activated shielding vessel |
| US20040217307A1 (en) * | 2003-03-19 | 2004-11-04 | Gesellschaft Fur Schwerionenforschung Mbh | Radiation shielding arrangement |
| CN201069665Y (en) * | 2006-12-20 | 2008-06-04 | 范就胜 | A radiation prevention plate |
| KR20090011055A (en) * | 2007-07-25 | 2009-02-02 | 지상협 | Fabric from radioactive ray shield |
| JP2011058922A (en) * | 2009-09-09 | 2011-03-24 | Japan Atomic Energy Agency | Neutron beam shielding structure and room equipped with radiation source |
| US20120281803A1 (en) * | 2011-05-07 | 2012-11-08 | Gip International, Ltd | Neutron absorbing composite for nuclear reactor applications |
| CN102496396A (en) * | 2011-11-16 | 2012-06-13 | 哈尔滨工业大学 | Rare earth/ tungsten/ polyethylene composite gradient nuclear radiation prevention material and production method thereof |
| JP2017125715A (en) * | 2016-01-12 | 2017-07-20 | 株式会社アトックス | Neutron shielding body |
| CN106847354A (en) * | 2017-02-08 | 2017-06-13 | 扬州大学 | A kind of cladding neutron shield door leaf with water-cooling channel |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109545415A (en) * | 2018-11-12 | 2019-03-29 | 东莞理工学院 | A kind of radiation protection material |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108053906B (en) | 2019-08-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102027054B (en) | Thermosetting epoxy resin, composite material, method of forming composite material article, mould and method of making a mould | |
| Liu et al. | An eco-friendliness inductive asphalt mixture comprising waste steel shavings and waste ferrites | |
| CN106552902B (en) | Efficient anti-vein type precoated sand and preparation method thereof | |
| MX2009009664A (en) | Low temperature coated particles for use as proppants or in gravel packs, methods for making and using the same. | |
| MX336826B (en) | Low temperature coated particles for use as proppants or in gravel packs, methods for making and using the same. | |
| US20180025799A1 (en) | Radiation shielding material | |
| CN105682897A (en) | Method and apparatus for adhesion of inserts | |
| CN107955332A (en) | A kind of neutron shield superhybrid composite laminate and preparation method thereof | |
| CN108053906A (en) | It is a kind of for radiation protection block of neutron scientific research and preparation method thereof | |
| CN101245215B (en) | Radioresistant paint for nuclear power plant and manufacture method thereof | |
| CN105702308A (en) | An epoxy resin based radiation protection material | |
| CN106229137A (en) | A kind of transformator dosing technology | |
| CN108058262A (en) | A kind of molding machine of neutron radiation shield concrete block | |
| CN104479389A (en) | Thermoset composite | |
| CN106893044A (en) | A kind of preparation method of fiberglass reinforced heat insulation sandwich composite | |
| CN105884382A (en) | Coating for non-shrinkage-cavity fusion cast brick heating insulated feeder head | |
| CN103992095A (en) | Self-propagating high-temperature synthesis and densification method of zirconolite-rich type man-made rock | |
| CN105152629A (en) | Basalt ceramsite | |
| CN104325588A (en) | Method for preparing fiber-enhanced polyurethane foam material from waste ultrahigh molecular weight polyethylene composite material | |
| CN101857417A (en) | Manufacturing method of light weight aggregate | |
| Bogiatzidis et al. | Development of Building and Insulation Epoxy Based Composite Materials Loaded with Construction and Demolition Wastes; Mechanical and Thermal-Insulation Behaviour Analysis | |
| CN104883831B (en) | Processing method, shell and the electronic equipment of a kind of electronic equipment shell | |
| CN207284043U (en) | Electromagnetic shielding film with good resistance to OSP | |
| CN105799095B (en) | A kind of blade mold and preparation method thereof | |
| CN106609118B (en) | A kind of sanitary ceramics crackle cold-patch agent and preparation method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20180518 Assignee: Guangzhou Jieming Building Materials Trade Co.,Ltd. Assignor: DONGGUAN University OF TECHNOLOGY Contract record no.: X2023990000091 Denomination of invention: A radiation block for neutron science research and its preparation method Granted publication date: 20190806 License type: Common License Record date: 20230112 |
|
| EE01 | Entry into force of recordation of patent licensing contract | ||
| EC01 | Cancellation of recordation of patent licensing contract |
Assignee: Guangzhou Jieming Building Materials Trade Co.,Ltd. Assignor: DONGGUAN University OF TECHNOLOGY Contract record no.: X2023990000091 Date of cancellation: 20230424 |
|
| EC01 | Cancellation of recordation of patent licensing contract |