Assignee
TOKAI ELECTRO CHEMICAL CO
JP·26 granted patents·375 citations·filing 1973–1998
Top patents by PatentIndex Score
26 records- 0193US3948703AMethod of chemically polishing copper and copper alloyTOKAI ELECTRO CHEMICAL CO·Filed 1973·Granted Apr 6, 1976·65 cites·9 claims
- 0285US5340496AStabilized sodium percarbonate compositionTOKAI ELECTRO CHEMICAL CO·Filed 1993·Granted Aug 23, 1994·59 cites·29 claims
- 0385US5122354AHistidine-hydrogen peroxide adduct and process for preparing sameTOKAI ELECTRO CHEMICAL CO·Filed 1990·Granted Jun 16, 1992·33 cites·4 claims
- 0485US4097478AProcess for preparing pyrazinesTOKAI ELECTRO CHEMICAL CO·Filed 1977·Granted Jun 27, 1978·13 cites·7 claims
- 0582US4244690AMethod of dyeing fibrous productsTOKAI ELECTRO CHEMICAL CO·Filed 1979·Granted Jan 13, 1981·14 cites·5 claims
- 0681US5055286AProcess for preparing high purity hydrogen peroxideTOKAI ELECTRO CHEMICAL CO·Filed 1988·Granted Oct 8, 1991·28 cites·4 claims
- 0776US4197256AMethod of stabilizing an alkaline aqueous solution of thiourea dioxideTOKAI ELECTRO CHEMICAL CO·Filed 1979·Granted Apr 8, 1980·10 cites·5 claims
- 0874US4040863AMethod of treating surface of copper and its alloysTOKAI ELECTRO CHEMICAL CO·Filed 1976·Granted Aug 9, 1977·15 cites·3 claims
- 0966US5223087AChemical solubilizing agent for tin or tin alloyTOKAI ELECTRO CHEMICAL CO·Filed 1990·Granted Jun 29, 1993·17 cites·3 claims
- 1065US5912385AProcess for the production of pure alkanesulfonic acidsTOKAI ELECTRO CHEMICAL CO·Filed 1998·Granted Jun 15, 1999·11 cites·6 claims
- 1164US5041569AProcess for preparing styrene oxideTOKAI ELECTRO CHEMICAL CO·Filed 1990·Granted Aug 20, 1991·12 cites·4 claims
- 1264US5030373ASurface-treating agents for copper and copper alloyTOKAI ELECTRO CHEMICAL CO·Filed 1990·Granted Jul 9, 1991·17 cites·3 claims
- 1364US4240791ADyeing method for fibrous productsTOKAI ELECTRO CHEMICAL CO·Filed 1979·Granted Dec 23, 1980·6 cites·4 claims
- 1464US3948795AMethod of low-temperature activation of peroxidesTOKAI ELECTRO CHEMICAL CO·Filed 1973·Granted Apr 6, 1976·9 cites·7 claims
- 1563US3939089AEtching solutions for copper and copper alloys and etching process using the sameTOKAI ELECTRO CHEMICAL CO·Filed 1974·Granted Feb 17, 1976·9 cites·9 claims
- 1661US3936332ACopper and copper alloy etching solutions and processTOKAI ELECTRO CHEMICAL CO·Filed 1974·Granted Feb 3, 1976·11 cites·10 claims
- 1758US4235812AProcess for preparing thiourea dioxideTOKAI ELECTRO CHEMICAL CO·Filed 1979·Granted Nov 25, 1980·4 cites·5 claims
- 1855US5211927AMethod for stabilizing acidic aqueous hydrogen peroxide solution containing copperTOKAI ELECTRO CHEMICAL CO·Filed 1991·Granted May 18, 1993·17 cites·8 claims
- 1954US5155241AProcess for preparing styrene oxideTOKAI ELECTRO CHEMICAL CO·Filed 1991·Granted Oct 13, 1992·6 cites·6 claims
- 2054US4382147AProcess for isolating 4,4-dihydroxydiphenyl sulfone from a mixture of dihydroxydiphenylsulfone isomersTOKAI ELECTRO CHEMICAL CO·Filed 1981·Granted May 3, 1983·5 cites·5 claims
- 2153US4943661AProcess for preparing thiourea dioxide derivativesTOKAI ELECTRO CHEMICAL CO·Filed 1989·Granted Jul 24, 1990·4 cites·5 claims
- 2253US4233238AProcess for preparing thiourea dioxideTOKAI ELECTRO CHEMICAL CO·Filed 1979·Granted Nov 11, 1980·3 cites·7 claims
- 2340US4238411AMethod of recovering thiourea dioxideTOKAI ELECTRO CHEMICAL CO·Filed 1979·Granted Dec 9, 1980·1 cites·13 claims
- 2437US4110237ACompositions containing a diazine and a halogen compound for catalyzing copper etching solutionsTOKAI ELECTRO CHEMICAL CO·Filed 1977·Granted Aug 29, 1978·5 cites·24 claims
- 2530US5149871AWater-soluble thiourea dioxide derivatives and process for preparing sameTOKAI ELECTRO CHEMICAL CO·Filed 1991·Granted Sep 22, 1992·0 cites·5 claims
- 2629US4610802AMethod of activating thiourea dioxideTOKAI ELECTRO CHEMICAL CO·Filed 1984·Granted Sep 9, 1986·1 cites·4 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →