Inventor
YAMAMOTO TOMITAKA
JP11 patents
⚠️ This page may combine multiple inventors who share the name “YAMAMOTO TOMITAKA”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
DIPSOL CHEM
10 patentsUS5938861AAug 17, 1999
Method for forming a rust proof film
DIPSOL CHEM53 citations94
US5743971AApr 28, 1998
Liquid rust proof film-forming composition and rust proof film-forming method
DIPSOL CHEM55 citations94
US6858098B2Feb 22, 2005
Processing 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 same
DIPSOL CHEM21 citations91
US6719852B2Apr 13, 2004
Processing 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 same
DIPSOL CHEM26 citations91
US5843338ADec 1, 1998
Water-soluble composition for water-repellent treatments of zinc and zinc alloy and method for water repellent treatment
DIPSOL CHEM24 citations91
US5565042AOct 15, 1996
Black chromate solution
DIPSOL CHEM5 citations59
US7914627B2Mar 29, 2011
Processing 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 same
DIPSOL CHEM0 citations51
US7745008B2Jun 29, 2010
Processing 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 same
DIPSOL CHEM0 citations51
US9249509B2Feb 2, 2016
Method for regenerating solution for nitric acid activation treatment of zinc-plated metal member surface, and regeneration treatment apparatus using the same
DIPSOL CHEM0 citations45
US11987888B2May 21, 2024
Trivalent chromium chemical conversion treatment liquid for zinc or zinc alloy base and chemical conversion treatment method using the same
DIPSOL CHEM0 citations44