CN105462266A - Novel magnetic fluid seal material applied to radial tire - Google Patents
Novel magnetic fluid seal material applied to radial tire Download PDFInfo
- Publication number
- CN105462266A CN105462266A CN201510988014.3A CN201510988014A CN105462266A CN 105462266 A CN105462266 A CN 105462266A CN 201510988014 A CN201510988014 A CN 201510988014A CN 105462266 A CN105462266 A CN 105462266A
- Authority
- CN
- China
- Prior art keywords
- magnetic fluid
- seal material
- fluid seal
- tire
- novel magnetic
- 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.)
- Pending
Links
- 239000000463 material Substances 0.000 title claims abstract description 27
- 239000011553 magnetic fluid Substances 0.000 title claims abstract description 22
- 229920001084 poly(chloroprene) Polymers 0.000 claims abstract description 11
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 9
- FLIACVVOZYBSBS-UHFFFAOYSA-N Methyl palmitate Chemical compound CCCCCCCCCCCCCCCC(=O)OC FLIACVVOZYBSBS-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000001257 hydrogen Substances 0.000 claims abstract description 9
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 9
- 239000002245 particle Substances 0.000 claims abstract description 9
- 229910000278 bentonite Inorganic materials 0.000 claims abstract description 8
- 239000000440 bentonite Substances 0.000 claims abstract description 8
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000000843 powder Substances 0.000 claims description 20
- 239000012530 fluid Substances 0.000 claims description 16
- 238000003756 stirring Methods 0.000 claims description 14
- 238000007789 sealing Methods 0.000 claims description 13
- DEGLFTVQHFLGRC-UHFFFAOYSA-N [B].[Fe].[Nd].[Fe] Chemical compound [B].[Fe].[Nd].[Fe] DEGLFTVQHFLGRC-UHFFFAOYSA-N 0.000 claims description 10
- 229910000828 alnico Inorganic materials 0.000 claims description 10
- 229920002367 Polyisobutene Polymers 0.000 claims description 9
- 229920000126 latex Polymers 0.000 claims description 9
- XFNJVJPLKCPIBV-UHFFFAOYSA-N trimethylenediamine Chemical compound NCCCN XFNJVJPLKCPIBV-UHFFFAOYSA-N 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 4
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 claims 2
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 claims 1
- 235000019253 formic acid Nutrition 0.000 claims 1
- IPCSVZSSVZVIGE-UHFFFAOYSA-N hexadecanoic acid Chemical compound CCCCCCCCCCCCCCCC(O)=O IPCSVZSSVZVIGE-UHFFFAOYSA-N 0.000 claims 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 10
- 230000007774 longterm Effects 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 abstract 2
- -1 methyl-ethyloxy Chemical group 0.000 abstract 2
- 239000010959 steel Substances 0.000 abstract 2
- KZNICNPSHKQLFF-UHFFFAOYSA-N succinimide Chemical compound O=C1CCC(=O)N1 KZNICNPSHKQLFF-UHFFFAOYSA-N 0.000 abstract 2
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 abstract 1
- 230000008014 freezing Effects 0.000 abstract 1
- 238000007710 freezing Methods 0.000 abstract 1
- 229920006173 natural rubber latex Polymers 0.000 abstract 1
- 229910001172 neodymium magnet Inorganic materials 0.000 abstract 1
- 229920002545 silicone oil Polymers 0.000 abstract 1
- 229960002317 succinimide Drugs 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 7
- 235000012216 bentonite Nutrition 0.000 description 6
- 239000000047 product Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 230000001052 transient effect Effects 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000012263 liquid product Substances 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000000274 adsorptive effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
- C08L83/04—Polysiloxanes
- C08L83/06—Polysiloxanes containing silicon bound to oxygen-containing groups
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/01—Magnetic additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Sealing Material Composition (AREA)
Abstract
The invention discloses a novel magnetic fluid seal material applied to a radial tire, and belongs to the technical field of tires. The formula of the novel magnetic fluid seal material is characterized by being prepared from methyl-ethyloxy silicone oil, hydrogen-based bentonite, nanoscale neodymium iron boron magnetic iron powder, nanoscale aluminum nickel cobalt magnetic iron powder, octadecanamino-propylamine, polyalkenyl succinimide, methyl palmitate, chloroprene rubber particles and natural rubber latex. The novel magnetic fluid seal material is mainly applied to the inside of the radial tire at a steel cord layer, and is the novel magnetic fluid seal material of the radial tire, which has no influence on dynamic balance of wheels, can quickly and automatically complete gaps (the diameter is smaller than or equal to 10mm), is free from dry rot and freezing, and is high in reliability, good in stability and durable. After the novel magnetic fluid seal material is used, a circle of magnetic fluid is uniformly hung on the inner wall of the tire along with the rotation of the wheels. According to the novel magnetic fluid seal material disclosed by the invention, the magnetic fluid is subjected to an attraction action of the steel cord layer in the tire, so that the magnetic fluid can be stably and uniformly hung on the inner wall of the tire for a long term, and thus the influence on the dynamic balance of the wheels is avoided; compared with the prior art, the novel magnetic fluid seal material disclosed by the invention really has revolutionary improvement.
Description
Technical field
The invention belongs to tyre technology, the present invention relates to a kind of being applied in radial take MethylethoxylsiliconFluid Fluid as the magnetic fluid tire seal novel material of external phase.
Background technology
Automobile and various motor vehicle one of important symbol becoming modern civilization, in its use procedure, tire is punctured by the nail on road surface or tip and hard object matter and causes disappointing, and the phenomenon causing vehicle normally not exercise often occurs.The automatic mending tyre liquid occurred the earliest is in U.S. army's wheeled vehicle in twenty or thirty age in last century, start application, in the tire of military vehicle, poured into automatic mending tyre liquid, apart from modern existing 80-90 history.Its advantage of the automatic mending tyre liquid of prior art is: tire patching need not take off tire, within 3 seconds, can mend; But, also there is more shortcoming: the transient equilibrium 1, affecting wheel: after employing a tank automatic mending tyre liquid, the inner bottom part place of tire remains the liquid of 200ml-300ml, as same eccentric wheel when this liquid makes wheel operate, both noise was added, again reduce stability, the traffic safety hidden danger that therefore have impact on transient equilibrium when wheel operates and bring to a certain extent.2, when the wound diameter of tire is greater than 6mm, automatic mending tyre liquid is inoperative.3, also have the automatic mending tyre liquid product of some inflation pot types, its composition can only make the tire lost heart temporarily inflate and subtract leakage, till treating that nearest service station exercised by vehicle.4, the tire repair liquid product had can dry up or meet cold snap and freeze in tire, not only loses mending-leakage effect, can damage the inwall of tire on the contrary.
The content of invention
The object of the invention is: provide one to be applied in radial, do not affect the transient equilibrium of wheel, energy fast self-compensating breach (diameter is less than or equal to 10mm), do not dry up, do not freeze, reliability is high, good stability, magnetic fluid tire seal novel material durable for a long time.
For achieving the above object, the magnetic fluid tire seal novel material of the technical solution adopted in the present invention to be a kind of MethylethoxylsiliconFluid Fluid be external phase, the feature of its formula is: by MethylethoxylsiliconFluid Fluid, hydrogen base bentonite, nano level neodymium-iron-boron iron powder, nano level alnico magnet powder, 18 amino propylamine, the many succimides of polyisobutene, Uniphat A60, chloroprene rubber particle, nature rubber latex composition.
The weight percent of its component is:
MethylethoxylsiliconFluid Fluid 65%--84%
Hydrogen base bentonite 1%--3%
Nano level neodymium-iron-boron iron powder 1%--2%
Nano level alnico magnet powder 2%--6%
18 amino propylamine 1%--2%
Polyisobutene many succimides 1%--2%
Uniphat A60 2%--5%
Chloroprene rubber particle (60 order-350 order) 5%--8%
Nature rubber latex 3%--7%
A kind of magnetic current sealing novel material being applied to radial of the present invention compared with the existing technology has the following advantages and positive effect: along with meridian metal-cord tire the popularizing in the whole world of advanced technology, on current market, automatic mending tyre liquid product miscellaneous is because of all reasons, is difficult to " lifelong together with tire ".Unlike the prior art: 1, invention applies Magneticfluid Seal Technique, nano level neodymium-iron-boron iron powder and nano level alnico magnet powder are highly dispersed in MethylethoxylsiliconFluid Fluid, make on product tape of the present invention magnetic, after employing product of the present invention, along with the rotation of wheel, tire inner wall hangs up a circle equably and has had certain thickness magnetic current sealing novel material, magnetic current sealing novel material of the present invention is by the suction of metal-cord in tire, can be steady in a long-term and hang over equably on tire inner wall, thus do not affect the transient equilibrium of wheel, this is compared with prior art revolutionary improvement really.2, be that the chloroprene rubber grain that 60 order-350 order adsorptive poweies are strong makes weighting agent by granularity in the middle of the present invention, at surface adsorption a large amount of nano level neodymium-iron-boron iron powders and the nano level alnico magnet powder of chloroprene rubber grain, they are scattered in MethylethoxylsiliconFluid Fluid with the form of sponge mesh network structure, during use, tire is worn as pricked by the iron nail being less than or equal to 10mm bore, before not pulling out iron nail, magnetic current sealing novel material near iron nail is assembled to the nail tip place pierced in tire, until wrapped up and sealed, afterwards, also gas leakage is there will not be in the moment of pulling out iron nail, the effect of zero leakage can be played, this also leads over prior art.3, to take MethylethoxylsiliconFluid Fluid as its advantage of external phase be in the present invention: the reliability of MethylethoxylsiliconFluid Fluid is high, good stability, it does not dry up, can be antirust, the effect having moist rubber tyre and prevent rubber tyre from chapping, can under the environment of-60 DEG C ~ 180 DEG C life-time service.In addition, present invention employs 18 amino propylamine and the many succimides of polyisobutene are hyper-dispersant, Uniphat A60 is rust-preventive agent, and nature rubber latex is tackiness agent.A kind of magnetic current sealing novel material being applied to radial of the present invention is better than prior art, and product of the present invention is the innovative product that " can accompany lifelong " with tire.
Product of the present invention to apply in such a way: 1, be stored in compression gas tank by the novel material of the present invention of magnetic fluid state, added in tire use by user.2, the novel material of the present invention of magnetic fluid state is stored in commercial bottle and a tyre little air pump, is used voluntarily by user.
Embodiment
The following examples make further proof to the present invention, the present invention is not limited thereto.
Embodiment one
Be applied to a magnetic current sealing novel material for radial, its component and weight proportion as follows:
MethylethoxylsiliconFluid Fluid 65 grams
Hydrogen base bentonite 3 grams
Nano level neodymium-iron-boron iron powder 2 grams
6 grams, nano level alnico magnet powder
18 amino propylamine 2 grams
The many succimides of polyisobutene 2 grams
Uniphat A60 5 grams
Chloroprene rubber particle (60 order-350 order) 8 grams
Nature rubber latex 7 grams
A kind of magnetic current sealing novel material being applied to radial of the present invention, its preparation method is: by 65 grams of MethylethoxylsiliconFluid Fluids, 3 grams of hydrogen base bentonites, 7 grams of nature rubber latexes, 5 grams of Uniphat A60s put into a stirring tank, stir 16 minutes, add 2 gram of 18 amino propylamine again, 2 grams of many succimides of polyisobutene continue stirring 12 minutes, then, add 2 grams of nano level neodymium-iron-boron iron powders, 6 grams of nano level alnico magnet powder continue stirring 7 minutes, finally add chloroprene rubber particle (60 order-350 order) and continue stirring 10 minutes, stirring completes, again the mixture fluid stirred is poured out from stirring tank, then, put into the ultrasonic emulsator of a 180w, " cavitation " of doing 30 minutes just obtains black paste and includes short grained magnetic fluid, the magnetic fluid of this black is finished product of the present invention, loaded in bottle and completed.
Embodiment two
Be applied to a magnetic current sealing novel material for radial, its component and weight proportion as follows:
MethylethoxylsiliconFluid Fluid 84 grams
Hydrogen base bentonite 1 gram
Nano level neodymium-iron-boron iron powder 1 gram
2 grams, nano level alnico magnet powder
18 amino propylamine 1 gram
The many succimides of polyisobutene 1 gram
Uniphat A60 2 grams
Chloroprene rubber particle (60 order-350 order) 5 grams
Nature rubber latex 3 grams
Kind to be applied to the magnetic current sealing novel material of radial, except the weight proportion difference in its component, consistent with described in embodiment one of its method prepared.
Embodiment three
Be applied to a magnetic current sealing novel material for radial, its component and weight proportion as follows:
MethylethoxylsiliconFluid Fluid 75 grams
Hydrogen base bentonite 2 grams
Nano level neodymium-iron-boron iron powder 1 gram
5 grams, nano level alnico magnet powder
18 amino propylamine 2 grams
The many succimides of polyisobutene 2 grams
Uniphat A60 5 grams
Chloroprene rubber particle (60-350 order) 5 grams
Nature rubber latex 3 grams
Be applied to a magnetic current sealing novel material for radial, except the weight proportion difference in its component, consistent with described in embodiment one of its method prepared.
Claims (2)
1. be applied to a magnetic current sealing novel material for radial, it is characterized in that: the weight percent of each component of this formula is: MethylethoxylsiliconFluid Fluid 65%--84%, hydrogen base bentonite 1%--3%, nano level neodymium-iron-boron iron powder 1%--2%, nano level alnico magnet powder 2%--6%, 18 amino propylamine 1%--2%, polyisobutene many succimides 1%--2%, palmitinic acid formic acid 2%--5%, chloroprene rubber particle (60 orders--350 orders) 5%--8%, nature rubber latex 3%--7%.
2. a kind of magnetic fluid tire seal novel material being applied to radial according to claim 1, it is characterized in that: its method prepared: by MethylethoxylsiliconFluid Fluid, hydrogen base bentonite, nature rubber latex, Uniphat A60 puts into a stirring tank, stir 16 minutes, add 18 amino propylamine again, the many succimides of polyisobutene continue stirring 12 minutes, then, add nano level neodymium-iron-boron iron powder, nano level alnico magnet powder continues stirring 7 minutes, finally add chloroprene rubber particle (60 orders--350 orders) and continue stirring 10 minutes, stirring completes, again the mixture fluid stirred is poured out from stirring tank, then, put into the ultrasonic emulsator of a 180w, " cavitation " of doing 30 minutes just obtains black paste and includes short grained magnetic fluid, the magnetic fluid of this black is finished product, loaded in bottle and completed.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201510988014.3A CN105462266A (en) | 2015-12-21 | 2015-12-21 | Novel magnetic fluid seal material applied to radial tire |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201510988014.3A CN105462266A (en) | 2015-12-21 | 2015-12-21 | Novel magnetic fluid seal material applied to radial tire |
Publications (1)
Publication Number | Publication Date |
---|---|
CN105462266A true CN105462266A (en) | 2016-04-06 |
Family
ID=55600449
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201510988014.3A Pending CN105462266A (en) | 2015-12-21 | 2015-12-21 | Novel magnetic fluid seal material applied to radial tire |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN105462266A (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1985436A1 (en) * | 2007-04-27 | 2008-10-29 | Continental Aktiengesellschaft | Pneumatic tyre with intermediate sealing layer and method for its manufacture |
CN104008845A (en) * | 2014-06-10 | 2014-08-27 | 冯智勇 | Novel magneticfluid sealant |
CN104376951A (en) * | 2014-11-08 | 2015-02-25 | 冯智勇 | New ether-group magnetic liquid sealing material |
CN104450060A (en) * | 2014-11-08 | 2015-03-25 | 冯智勇 | New ester-based magnetofluid sealing material having excellent temperature resistance |
CN104673132A (en) * | 2013-11-28 | 2015-06-03 | 大连轮胎厂有限公司 | Airtight sizing material for repairing tyres and preparation method thereof |
-
2015
- 2015-12-21 CN CN201510988014.3A patent/CN105462266A/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1985436A1 (en) * | 2007-04-27 | 2008-10-29 | Continental Aktiengesellschaft | Pneumatic tyre with intermediate sealing layer and method for its manufacture |
CN104673132A (en) * | 2013-11-28 | 2015-06-03 | 大连轮胎厂有限公司 | Airtight sizing material for repairing tyres and preparation method thereof |
CN104008845A (en) * | 2014-06-10 | 2014-08-27 | 冯智勇 | Novel magneticfluid sealant |
CN104376951A (en) * | 2014-11-08 | 2015-02-25 | 冯智勇 | New ether-group magnetic liquid sealing material |
CN104450060A (en) * | 2014-11-08 | 2015-03-25 | 冯智勇 | New ester-based magnetofluid sealing material having excellent temperature resistance |
Non-Patent Citations (3)
Title |
---|
KOSUKE NAGAYA,等: "Tire with self-repairing mechanism", 《JSME INTERNATIONAL JOURNAL》 * |
周学良,等: "《橡塑助剂》", 30 April 2002, 化学工业出版社 * |
朱永康: "轮胎防穿刺密封胶", 《世界橡胶工业》 * |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP4929358B2 (en) | Anti-puncture, bulletproof, and leak-proof safety tire and method for preparing the same, and leak-proof and hermetically crosslinked polymer material used in the method | |
AU2016348752B2 (en) | Sealant composition | |
CN103732714B (en) | Mending agent for tyre | |
CN109825161A (en) | A kind of selfreparing safety tread | |
EP3245050A1 (en) | High performance sealant composition for tire repair | |
CN105462266A (en) | Novel magnetic fluid seal material applied to radial tire | |
JP2011006646A (en) | Puncture sealing agent | |
CN105462262A (en) | Novel magnetofluid tire sealing material taking methylsilicone oil as continuous phase | |
CN104962041B (en) | Self-repairing high-molecular memory material for tyre and using method thereof | |
CN105504834A (en) | Novel material taking cyanogen-containing silicone oil as continuous phase and used for magnetic fluid tire sealing | |
CN105670562A (en) | Novel magnetic fluid tire sealing material with phenyl silicone oil as continuous phase | |
CN105462268A (en) | New magnetofluid tire seal material taking ethyl silicon oil as continuous phase | |
CN105925116A (en) | Novel composite tire-sealing material containing C5 petroleum resin | |
CN107641283A (en) | A kind of spraying glue of anti-tie flat | |
JP2015117331A (en) | Sealant composition and method of preparing the same | |
CN106085022A (en) | A kind of tire seal new material being made up of high molecular polymer | |
CN106117967A (en) | Include the tire seal composite material of RX 80 tackifying resin | |
CN105907011A (en) | Tire sealing composite novel material containing thermoplastic acrylic resin | |
CN106084629A (en) | Include the tire seal composite material of BN 2 tackifying resin | |
JP4673003B2 (en) | Puncture sealant | |
CN106084813A (en) | Include the tire seal composite material of HA494 tackifying resin | |
CN107090345A (en) | A kind of lubricating fluid assembled for solid tyre and preparation method | |
CN105969038A (en) | Novel tire sealing composite material containing 204 tackifying resin | |
JP2014055207A (en) | Puncture sealant | |
CN105907124A (en) | Tire sealing composite new material containing CX-70 tackifying resin |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
C06 | Publication | ||
PB01 | Publication | ||
C10 | Entry into substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160406 |
|
WD01 | Invention patent application deemed withdrawn after publication |