CN107460468B - A kind of iron-based antirust complex oxide film - Google Patents
A kind of iron-based antirust complex oxide film Download PDFInfo
- Publication number
- CN107460468B CN107460468B CN201610391753.9A CN201610391753A CN107460468B CN 107460468 B CN107460468 B CN 107460468B CN 201610391753 A CN201610391753 A CN 201610391753A CN 107460468 B CN107460468 B CN 107460468B
- Authority
- CN
- China
- Prior art keywords
- iron
- complex oxide
- oxide film
- additive amount
- based antirust
- 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.)
- Active
Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 76
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 38
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 claims abstract description 21
- 230000002378 acidificating effect Effects 0.000 claims abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 18
- 229910021626 Tin(II) chloride Inorganic materials 0.000 claims abstract description 13
- 238000002791 soaking Methods 0.000 claims abstract description 13
- 239000011159 matrix material Substances 0.000 claims abstract description 11
- 238000006243 chemical reaction Methods 0.000 claims abstract description 7
- 238000002360 preparation method Methods 0.000 claims abstract description 6
- 238000003756 stirring Methods 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000000654 additive Substances 0.000 claims description 35
- 230000000996 additive effect Effects 0.000 claims description 9
- 230000003647 oxidation Effects 0.000 abstract description 14
- 238000007254 oxidation reaction Methods 0.000 abstract description 14
- 239000002253 acid Substances 0.000 abstract description 4
- 238000005260 corrosion Methods 0.000 abstract description 3
- 230000007797 corrosion Effects 0.000 abstract description 3
- 239000011248 coating agent Substances 0.000 abstract description 2
- 238000000576 coating method Methods 0.000 abstract description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 28
- 239000011575 calcium Substances 0.000 description 10
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 3
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 3
- 238000002386 leaching Methods 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000010411 cooking Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 229960000583 acetic acid Drugs 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000012362 glacial acetic acid Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 239000000052 vinegar Substances 0.000 description 1
- 235000021419 vinegar Nutrition 0.000 description 1
- 229910003145 α-Fe2O3 Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/07—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing phosphates
- C23C22/08—Orthophosphates
- C23C22/22—Orthophosphates containing alkaline earth metal cations
Landscapes
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Treatment Of Metals (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention discloses a kind of iron-based antirust complex oxide films.The thickness of current iron-based oxidation film is usually at 2-5 microns, and antirust ability is low, and corrosion resistance is poor, and acid resistance is also poor, and wear resistance is also very low.The present invention is immersed in acidic treatment liquid using iron matrix carries out the iron-based antirust complex oxide film of chemical reaction generation, and soaking temperature control is at 90-110 DEG C, and soaking time is 20-60 minutes, and the preparation method of the acidic treatment liquid is as follows: H being first added in water3PO4, FeO, Ca (NO is then added3)2、SnCl2And NaNO3, stir and form acidic treatment liquid.The present invention makes rustless property, wear-resisting property, high temperature resistance and the hardness of oxidation film be greatly improved, it is also made to have being well bonded between coating, and especially rustless property is greatly improved.
Description
Technical field
The present invention relates to the oxidation film on iron matrix surface, specifically a kind of iron-based antirust complex oxide film.
Background technique
Iron is easy to get rusty in use.When the cooking appliances such as iron pan are made in iron, since cooking appliance is using
When can touch the chemical substances such as many salt, vinegar, these substances can corrode iron, in order to prevent this point, and people are in iron surface oxygen
Change processing and form layer oxide film, so that iron surface is in black.
The black oxide film is usually by FeO, Fe3O4And Fe2O3Up of three-layer, distribution situation are proximate to matrix
It is the ferrous oxide (FeO) of grey, middle layer is blue-black magnetic iron oxide (Fe3O4), outermost layer is the three of a small amount of rufous
Aoxidize two iron (Fe2O3), wherein with α-Fe2O3Based on.It is FeO layers most thick, account for about the 90% of entire oxide thickness.Before currently forming
State processing method used in oxidation film are as follows: iron matrix is placed in the strong basicity melt of melting and is aoxidized, temperature is in 400-450
DEG C, the hole of oxidation film is small, since melt is in alkalinity, to the oxidation membrane pores of generation without solvability, when the thickness of oxidation film
At 2-5 microns, hole is just closed, and the thickness of oxidation film is not just further added by.Using current processing method, the thickness of oxidation film
Degree is usually at 2-5 microns.Also just because of the thinner thickness of oxidation film, rustless property is low, and corrosion resistance is poor, and acid resistance is also poor,
Wear resistance is also very low.
Summary of the invention
The technical problem to be solved by the present invention is to overcome the problems of the above-mentioned prior art, one kind is provided and is immersed in acid
Property treatment fluid in carry out chemical reaction generation iron-based complex oxide film, thickness maximum is up to 50 microns, to improve oxygen
Change rustless property, wear-resisting property, high temperature resistance and the hardness of film, especially rustless property.
For this purpose, the present invention adopts the following technical scheme that: a kind of iron-based antirust complex oxide film uses iron matrix to impregnate
Chemical reaction generation is carried out in acidic treatment liquid, at 90-110 DEG C, soaking time is 20-60 minutes for soaking temperature control, should
The preparation method of acidic treatment liquid is as follows: H being first added in water3PO4, FeO, Ca (NO is then added3)2、SnCl2And NaNO3, stir
It mixes to form acidic treatment liquid；
The additive amount of above-mentioned FeO is 5-15g/L, Ca (NO3)2Additive amount be 5-15g/L, SnCl2Additive amount be 5-
15g/L, H3PO4Additive amount be 15-35g/L, NaNO3Additive amount be 1-10g/L.
Iron matrix of the present invention can be the steel plate or cast iron after oil removing, derusting, and calcium and tin can significantly improve multiple
Close the rustless property of oxidation film.The treatment fluid as used in the present invention has solvability in acidity, to the hole of oxidation film, from
And the thickness maximum of oxidation film can be made up to 50 microns.Complex oxide film of the invention is in grey black.
As further improving and supplementing to above-mentioned technical proposal, the present invention takes following technical measures:
The complex oxide film with a thickness of 5-50 microns, preferably 35-45 microns.
Soaking temperature is preferably controlled in 95-100 DEG C.
Soaking time is preferably 30-50 minutes.
The additive amount of the FeO is preferably 8-12g/L.
Ca (the NO3)2Additive amount be preferably 8-12g/L.
The SnCl2Additive amount be preferably 8-12g/L.
The H3PO4Additive amount be preferably 20-30g/L.
The NaNO3Additive amount be preferably 3-8g/L.
The invention has the following advantages: the oxidation film that the present invention is formed on iron matrix surface, thickness maximum can be with
Reach 50 microns, so that rustless property, wear-resisting property, high temperature resistance and hardness is greatly improved, also make it
Have between coating and be well bonded, especially rustless property (salt tolerant, acid, alkali) is greatly improved.
Specific embodiment
The present invention is further illustrated With reference to embodiment.
Embodiment 1
Iron-based antirust complex oxide film uses iron matrix to be immersed in acidic treatment liquid and carries out chemical reaction generation, leaching
Temperature control is steeped at 95 DEG C, and soaking time is 30 minutes, and the preparation method of the acidic treatment liquid is as follows: being first added in water
H3PO4, FeO, Ca (NO is then added3)2、SnCl2And NaNO3, stir and form acidic treatment liquid；The additive amount of above-mentioned FeO is 8g/
L, Ca (NO3)2Additive amount be 8g/L, SnCl2Additive amount be 8g/L, H3PO4Additive amount be 20g/L, NaNO3Additive amount
For 3g/L.
Obtained complex oxide film with a thickness of 35 microns.
Embodiment 2
Iron-based antirust complex oxide film uses iron matrix to be immersed in acidic treatment liquid and carries out chemical reaction generation, leaching
Temperature control is steeped at 98 DEG C, and soaking time is 40 minutes, and the preparation method of the acidic treatment liquid is as follows: being first added in water
H3PO4, FeO, Ca (NO is then added3)2、SnCl2And NaNO3, stir and form acidic treatment liquid；The additive amount of above-mentioned FeO is
10g/L, Ca (NO3)2Additive amount be 10g/L, SnCl2Additive amount be 10g/L, H3PO4Additive amount be 25g/L, NaNO3's
Additive amount is 5g/L.
Obtained complex oxide film with a thickness of 40 microns.
Embodiment 3
Iron-based antirust complex oxide film uses iron matrix to be immersed in acidic treatment liquid and carries out chemical reaction generation, leaching
Temperature control is steeped at 100 DEG C, and soaking time is 50 minutes, and the preparation method of the acidic treatment liquid is as follows: being first added in water
H3PO4, FeO, Ca (NO is then added3)2、SnCl2And NaNO3, stir and form acidic treatment liquid；The additive amount of above-mentioned FeO is
12g/L, Ca (NO3)2Additive amount be 12g/L, SnCl2Additive amount be 12g/L, H3PO4Additive amount be 30g/L, NaNO3's
Additive amount is 8g/L.
Obtained complex oxide film with a thickness of 45 microns.
Performance detection is carried out to the complex oxide film that above-described embodiment obtains, detection method and corresponding result are as follows:
Salt tolerant: 1) at normal temperature, complex oxide film is immersed in 96 hours in 5% sodium chloride solution.Testing result: do not have
Corrosion.2) complex oxide film is immersed in 8 hours in 100 DEG C of 5% sodium chloride solution.Testing result: it does not corrode.
Acidproof: at normal temperature, complex oxide film is immersed in 12 hours in 2-5% glacial acetic acid.Testing result: film is not worn.
Alkaline-resisting: at normal temperature, complex oxide film is immersed in 120 hours in 5% sodium carbonate liquor.Testing result: rustless
Erosion.
High temperature resistant: 650 DEG C or so.
Hardness: Mo Shi hardness, 6 grades (the steel plate hardness of not oxidised processing is 4-5 grades).
The above described is only a preferred embodiment of the present invention, not making in any form to structure of the invention
Limitation.Any simple modification, equivalent change and modification to the above embodiments according to the technical essence of the invention,
It falls within the scope of protection of the present invention.
Claims (10)
1. a kind of iron-based antirust complex oxide film, uses iron matrix to be immersed in acidic treatment liquid and carries out chemical reaction generation,
Soaking temperature control is at 90-110 DEG C, and soaking time is 20-60 minutes, and the preparation method of the acidic treatment liquid is as follows: in water
H is first added3PO4, FeO, Ca (NO is then added3)2、SnCl2And NaNO3, stir and form acidic treatment liquid；
The additive amount of above-mentioned FeO is 5-15g/L, Ca (NO3)2Additive amount be 5-15g/L, SnCl2Additive amount be 5-15g/L,
H3PO4Additive amount be 15-35g/L, NaNO3Additive amount be 1-10g/L.
2. iron-based antirust complex oxide film according to claim 1, which is characterized in that the complex oxide film with a thickness of
5-50 microns.
3. iron-based antirust complex oxide film according to claim 2, which is characterized in that the complex oxide film with a thickness of
35-45 microns.
4. iron-based antirust complex oxide film according to claim 1, which is characterized in that soaking temperature is controlled in 95-100
℃。
5. iron-based antirust complex oxide film according to claim 1, which is characterized in that soaking time is 30-50 minutes.
6. iron-based antirust complex oxide film according to claim 1, which is characterized in that the additive amount of the FeO is 8-
12g/L。
7. iron-based antirust complex oxide film according to claim 1, which is characterized in that the Ca (NO3)2Additive amount be
8-12g/L。
8. iron-based antirust complex oxide film according to claim 1, which is characterized in that the SnCl2Additive amount be 8-
12g/L。
9. iron-based antirust complex oxide film according to claim 1, which is characterized in that the H3PO4Additive amount be 20-
30g/L。
10. iron-based antirust complex oxide film according to claim 1, which is characterized in that the NaNO3Additive amount be 3-
8g/L。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610391753.9A CN107460468B (en) | 2016-06-06 | 2016-06-06 | A kind of iron-based antirust complex oxide film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610391753.9A CN107460468B (en) | 2016-06-06 | 2016-06-06 | A kind of iron-based antirust complex oxide film |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107460468A CN107460468A (en) | 2017-12-12 |
| CN107460468B true CN107460468B (en) | 2019-04-09 |
Family
ID=60545056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610391753.9A Active CN107460468B (en) | 2016-06-06 | 2016-06-06 | A kind of iron-based antirust complex oxide film |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107460468B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113652628A (en) * | 2021-08-23 | 2021-11-16 | 卢军波 | Metal surface antirust quenching treatment process |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1197849A (en) * | 1997-03-07 | 1998-11-04 | 日本巴可莱新株式会社 | Metallic surface pretreating liquid and method before formation and treatment of phosphate coating |
| CN1687483A (en) * | 2005-04-22 | 2005-10-26 | 吉林大学 | Method for preparing film of inorganic phosphate in aqueous solution |
| CN101061062A (en) * | 2004-11-10 | 2007-10-24 | 大日本印刷株式会社 | Method for producing metal oxide film |
| CN103108991A (en) * | 2010-09-15 | 2013-05-15 | 杰富意钢铁株式会社 | Manufacturing method for steel plates for containers |
| CN104404489A (en) * | 2014-12-12 | 2015-03-11 | 重庆跃进机械厂有限公司 | Zinc series phosphating solution for aluminum alloys |
| CN105200413A (en) * | 2015-09-14 | 2015-12-30 | 山东科技大学 | Preparation method of Ca-P-Sn composite coating layer on surface of magnesium alloy |
-
2016
- 2016-06-06 CN CN201610391753.9A patent/CN107460468B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1197849A (en) * | 1997-03-07 | 1998-11-04 | 日本巴可莱新株式会社 | Metallic surface pretreating liquid and method before formation and treatment of phosphate coating |
| CN101061062A (en) * | 2004-11-10 | 2007-10-24 | 大日本印刷株式会社 | Method for producing metal oxide film |
| CN1687483A (en) * | 2005-04-22 | 2005-10-26 | 吉林大学 | Method for preparing film of inorganic phosphate in aqueous solution |
| CN103108991A (en) * | 2010-09-15 | 2013-05-15 | 杰富意钢铁株式会社 | Manufacturing method for steel plates for containers |
| CN104404489A (en) * | 2014-12-12 | 2015-03-11 | 重庆跃进机械厂有限公司 | Zinc series phosphating solution for aluminum alloys |
| CN105200413A (en) * | 2015-09-14 | 2015-12-30 | 山东科技大学 | Preparation method of Ca-P-Sn composite coating layer on surface of magnesium alloy |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107460468A (en) | 2017-12-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105331966B (en) | A kind of Chrome-free surface treatment tin plate, its production method and surface conditioning agent | |
| TWI493077B (en) | A water-based metal surface treatment agent and a metal surface treatment method using the same | |
| CN101509131B (en) | Preparation method of anti-corrosion fingerprint-resistant surface treating agent | |
| De Damborenea et al. | Corrosion inhibition with rare earth metal compounds in aqueous solutions | |
| KR20060126752A (en) | Chrome-free passivating solution | |
| TWI374198B (en) | ||
| CA2941123C (en) | Passivation of micro-discontinuous chromium deposited from a trivalent electrolyte | |
| CN109112520B (en) | Strengthening process of conversion coating on surface of metal piece | |
| TW201122156A (en) | Zn plated steel sheet | |
| TW201420810A (en) | Aqueous metal surface treatment agent and metal surface treatment method using the same | |
| CN109930191A (en) | Antibacterial stainless steel and preparation method thereof | |
| CN103060789A (en) | Whole chromium-free high-corrosion-resistant zinc-coated iridescent passivation solution and preparation method thereof | |
| CN106756945A (en) | A kind of plated steel sheet chromium-free passivation liquid | |
| CN107460468B (en) | A kind of iron-based antirust complex oxide film | |
| TW201026894A (en) | Aqueous solution for blackened chemical conversion treatment of zinc or zinc alloy surface and method of forming black anti-corrosion coating using aqueous solution for the said treatment | |
| CN105018922A (en) | Ferritic stainless steel processing method | |
| CN103966590B (en) | The method of single silane coupler compound chromium-free passivation liquid and passivation zinc-coated wire overlay coating | |
| CN102089463B (en) | Tin-plated steel sheet and method for producing same | |
| CN101693993B (en) | Phosphorization processing liquid for surface of carbon steel and nickel plating enclosure method | |
| CN105839099A (en) | Chromate-free passivation treating agent for nickel-plated surface and treating process | |
| US20100181201A1 (en) | Electrolytic passivated tin plated steel | |
| CN107460469A (en) | Iron-based complex oxide film is used in one kind spraying | |
| CN109183083A (en) | A method of improving chromium plating plate surface based on thermodynamic consistence problem can | |
| CN107338428B (en) | Cobalt, zinc, iron ternary system phosphate metal conditioner, preparation method and composite deposition object | |
| CN107460466A (en) | A kind of wear-resisting complex oxide film of iron-based |
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 | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20231221 Address after: 432800 Yingwu Avenue, Dawu County Economic Development Zone, Xiaogan, Hubei Patentee after: HUBEI RONGTAI COOKER CO.,LTD. Address before: Room 610, Building 43, Wulong Community, Taiping Street, Wenling City, Taizhou City, Zhejiang Province, 317599 Patentee before: Li Li Patentee before: Liu Li |
|
| TR01 | Transfer of patent right |