Inventor · disambiguated record
Tomitaka Yamamoto
Also filed as: YAMAMOTO TOMITAKA
11 granted patents·3 pending applications·190 citations·filing 1995–2022
90Inventor score
Top patents by PatentIndex Score
14 records- 0184US6858098B2Processing solution for forming hexavalent chromium free and corrosion resistant conversion film on zinc or zinc alloy plating layers, hexavalent chromium free and corrosion resistant conversion film, method for forming the sameDIPSOL CHEM·Filed 2002·Granted Feb 22, 2005·21 cites·16 claims
- 0283US6719852B2Processing solution for forming hexavalent chromium free and corrosion resistant conversion film on zinc or zinc alloy plating layers, hexavalent chromium free and corrosion resistant conversion film and method for forming the sameDIPSOL CHEM·Filed 2002·Granted Apr 13, 2004·26 cites·29 claims
- 0383US5938861AMethod for forming a rust proof filmDIPSOL CHEM·Filed 1998·Granted Aug 17, 1999·53 cites·11 claims
- 0483US5743971ALiquid rust proof film-forming composition and rust proof film-forming methodDIPSOL CHEM·Filed 1996·Granted Apr 28, 1998·55 cites·9 claims
- 0572US11987888B2Trivalent chromium chemical conversion treatment liquid for zinc or zinc alloy base and chemical conversion treatment method using the sameDIPSOL CHEM·Filed 2022·Granted May 21, 2024·0 cites·15 claims
- 0672US8337641B2Treatment solution for forming black hexavalent chromium-free chemical conversion coating film on zinc or zinc alloyYAMAMOTO TOMITAKA·Filed 2008·Granted Dec 25, 2012·6 cites·7 claims
- 0762US5843338AWater-soluble composition for water-repellent treatments of zinc and zinc alloy and method for water repellent treatmentDIPSOL CHEM·Filed 1996·Granted Dec 1, 1998·24 cites·7 claims
- 0862US2019078214A1Trivalent chromium chemical conversion treatment liquid for zinc or zinc alloy base and chemical conversion treatment method using the sameDIPSOL CHEM·Filed 2018·Application pending·0 cites
- 0961US7914627B2Processing solution for forming hexavalent chromium free and corrosion resistant conversion film on zinc or zinc alloy plating layers, hexavalent chromium free and corrosion resistant conversion film, method for forming the sameDIPSOL CHEM·Filed 2010·Granted Mar 29, 2011·0 cites·17 claims
- 1058US9249509B2Method for regenerating solution for nitric acid activation treatment of zinc-plated metal member surface, and regeneration treatment apparatus using the sameDIPSOL CHEM·Filed 2013·Granted Feb 2, 2016·0 cites·12 claims
- 1153US2023304160A1Chemical conversion treatment solution, chemical conversion treatment method in which same is used, and chemical conversion coatingDIPSOL CHEM·Filed 2021·Application pending·0 cites
- 1251US7745008B2Processing solution for forming hexavalent chromium free and corrosion resistant conversion film on zinc or zinc alloy plating layers, hexavalent chromium free and corrosion resistant conversion film, method for forming the sameDIPSOL CHEM·Filed 2004·Granted Jun 29, 2010·0 cites·16 claims
- 1351US2007023104A1Agent for reducing conversion film overall friction coefficient for trivalent chromate treating solution, trivalent chromate treating solution and method for production thereof, and trivalent chromate conversion film reduced in overall friction coefficient and method for production thereofDIPSOL CHEM·Filed 2006·Application pending·0 cites
- 1432US5565042ABlack chromate solutionDIPSOL CHEM·Filed 1995·Granted Oct 15, 1996·5 cites·8 claims
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →