Inventor · disambiguated record
Yoshiaki Echigo
Also filed as: ECHIGO YOSHIAKI
38 granted patents·8 pending applications·824 citations·filing 1981–2020
98Inventor score
Top patents by PatentIndex Score
46 records- 0191US5225296AElectrode and method of producing the sameRICOH KK·Filed 1990·Granted Jul 6, 1993·88 cites·30 claims
- 0288US4414183APhenolic chelate resin, process for producing the same, and method of recovering heavy metal ions with the sameUNITIKA LTD·Filed 1982·Granted Nov 8, 1983·23 cites·5 claims
- 0387US4383104APhenolic chelate resin, process for producing the same, and method of recovering heavy metal ions with the sameUNITIKA LTD·Filed 1981·Granted May 10, 1983·21 cites·11 claims
- 0485US4576969ASpherical ion exchange resin having matrix-bound metal hydroxide, method for producing the same and method for adsorption treatment using the sameUNITIKA LTD·Filed 1983·Granted Mar 18, 1986·49 cites·15 claims
- 0583US4808316AProcess for treating waste water containing uranium and fluorineUNITIKA LTD·Filed 1987·Granted Feb 28, 1989·29 cites·7 claims
- 0682US4559216AMethod for purification of sulfuric acid solutionUNITIKA LTD·Filed 1984·Granted Dec 17, 1985·40 cites·15 claims
- 0781US6133330AAromatic polyimide foamNASA·Filed 1999·Granted Oct 17, 2000·40 cites·20 claims
- 0878US5510395AFilm forming solution, porous film obtained therefrom and coated material with the porous filmUNITIKA LTD·Filed 1994·Granted Apr 23, 1996·23 cites·27 claims
- 0977US10759753B2Bismaleimide modified product and method for producing the sameUNITIKA LTD·Filed 2018·Granted Sep 1, 2020·1 cites·2 claims
- 1077US5994418AHollow polyimide microspheresNASA·Filed 1999·Granted Nov 30, 1999·35 cites·3 claims
- 1177US5108862AComposite carrier particles for electrophotography and process for producing the sameTODA KOGYO CORP·Filed 1990·Granted Apr 28, 1992·24 cites·13 claims
- 1276US6222007B1Films, preimpregnated tapes and composites made from polyimide “Salt-like” SolutionsNASA·Filed 1998·Granted Apr 24, 2001·26 cites·17 claims
- 1376US5719253APoly(amic acid) solution and polyimide film or polymide-coated material obtained therefromUNITIKA LTD·Filed 1995·Granted Feb 17, 1998·29 cites·5 claims
- 1475US5489492AComposite sheet electrodeUNITIKA LTD·Filed 1994·Granted Feb 6, 1996·51 cites·8 claims
- 1575US4748214AMicrospherical cured phenolic resin particles and process for production thereof using emulsion stabilizersUNITIKA LTD·Filed 1986·Granted May 31, 1988·25 cites·18 claims
- 1673US6235803B1Hollow polymide microspheresNASA·Filed 1999·Granted May 22, 2001·32 cites·8 claims
- 1773US5348818ACarbonaceous material and a cell using the sameUNITIKA LTD·Filed 1993·Granted Sep 20, 1994·45 cites·15 claims
- 1870US8492506B2Polyimide resin composition, polyimide precursor resin composition for the same, production method thereof, and polyimide film and production method thereofYOSHIDA TAKESHI·Filed 2008·Granted Jul 23, 2013·1 cites·23 claims
- 1970US4640971AMicrospherical particles of resole resins and process for producing the sameUNITIKA LTD·Filed 1985·Granted Feb 3, 1987·21 cites·4 claims
- 2066US10836719B2Production method of maleimideUNITIKA LTD·Filed 2019·Granted Nov 17, 2020·0 cites·8 claims
- 2166US5721031AFiber-reinforced porous plastic tubeUNITIKA LTD·Filed 1994·Granted Feb 24, 1998·26 cites·14 claims
- 2265US11958806B2Production method of maleimideUNITIKA LTD·Filed 2020·Granted Apr 16, 2024·0 cites·4 claims
- 2365US11104643B2Bismaleimide modified product and method for producing the sameUNITIKA LTD·Filed 2020·Granted Aug 31, 2021·0 cites·1 claims
- 2465US6294049B1Polyimide precursor fibrid, polyimide paper, polyimide composite paper and polyimide composite board obtained therefrom, and process for producing the fibrid and the paper productsUNITIKA LTD·Filed 1995·Granted Sep 25, 2001·20 cites·6 claims
- 2565US6084000AHollow polyimide microspheresNASA·Filed 1999·Granted Jul 4, 2000·19 cites·5 claims
- 2664US5854380APolyimide precursor solution process for the production thereof coating or film obtained therefrom and process for producing the filmUNITIKA LTD·Filed 1997·Granted Dec 29, 1998·12 cites·18 claims
- 2764US2019382341A1Bismaleimide and method for producing the sameUNITIKA LTD·Filed 2019·Application pending·0 cites
- 2863US4769180AProcess for separately recovering uranium and hydrofluoric acid from waste liquor containing uranium and fluorineDORYOKURO KAKUNENRYO·Filed 1987·Granted Sep 6, 1988·17 cites·7 claims
- 2962US6962726B2Method for preparing substrate for flexible print wiring board, and substrate for flexible print wiring boardNIPPON KAYAKU KK·Filed 2001·Granted Nov 8, 2005·9 cites·7 claims
- 3062US6180746B1Polyimide precursor solid residuumNASA·Filed 1999·Granted Jan 30, 2001·18 cites·14 claims
- 3160US4778695AProduction of microspheroidal particles of resole resinsUNITIKA LTD·Filed 1986·Granted Oct 18, 1988·15 cites·8 claims
- 3259US7384683B2Substrate for flexible printed wiring board and method for manufacturing the sameUNITIKA LTD·Filed 2004·Granted Jun 10, 2008·9 cites·6 claims
- 3359US2018201579A1Bismaleimide and production method thereofUNITIKA LTD·Filed 2018·Application pending·0 cites
- 3457US5466732APolyimide precursor solution, process for producing the solution and moldings and coatings obtained therefromUNITIKA LTD·Filed 1994·Granted Nov 14, 1995·15 cites·40 claims
- 3556US6133407APolyimide precursor solution, coating film obtained therefrom, and process for producing polyimide coating filmUNITIKA LTD·Filed 1998·Granted Oct 17, 2000·14 cites·15 claims
- 3653US5817423APTC element and process for producing the sameUNITIKA LTD·Filed 1996·Granted Oct 6, 1998·11 cites·7 claims
- 3749US2009246554A1Laminate having peelability and production method thereforFURUKAWA MIKIO·Filed 2008·Application pending·0 cites
- 3848US4942192ARubber compositions for tiresBRIDGESTONE CORP·Filed 1988·Granted Jul 17, 1990·11 cites·5 claims
- 3945US4839445ASpherical particles of thermosetting phenolic resin and process for producing the sameUNITIKA LTD·Filed 1988·Granted Jun 13, 1989·9 cites·20 claims
- 4043US5463016AGranular material of polyimide precursor, mixture comprising the material and process for producing the materialUNITIKA LTD·Filed 1994·Granted Oct 31, 1995·7 cites·13 claims
- 4143US2016214169A1Fibrous copper microparticles and process for producing sameUNITIKA LTD·Filed 2013·Application pending·0 cites
- 4243US2015147584A1Fibrous copper microparticles and method for manufacturing sameYAMADA MUNENORI·Filed 2013·Application pending·0 cites
- 4341US2014120360A1Coated fibrous copper microparticles, and electrically conductive coating agent and electrically conductive film each containing said coated fibrous copper microparticlesYAMADA MUNENORI·Filed 2012·Application pending·0 cites
- 4439US5906712AProduction of fiber reinforced compositeUNITIKA LTD·Filed 1994·Granted May 25, 1999·9 cites·7 claims
- 4539US2007170598A1Flexible circuit board, method for making the same, flexible multi-layer wiring circuit board, and method for making the sameSONY CHEMICALS CORP·Filed 2004·Application pending·0 cites
- 4629US2005107526A1Polyimide precursor solution, transfer/fixing member and process for producing polyimide seamless beltFiled 2003·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →