Inventor · disambiguated record
Hellmut Kast
Also filed as: KAST HELLMUT
13 granted patents·83 citations·filing 1974–2001
90Inventor score
Files withBASF AG13
Top patents by PatentIndex Score
13 records- 0192US4223144ATriphenylmethane dyesBASF AG·Filed 1978·Granted Sep 16, 1980·24 cites·8 claims
- 0278US4147604APhotopolymerizable binders containing diaminobenzophenonesBASF AG·Filed 1978·Granted Apr 3, 1979·20 cites·3 claims
- 0366US3931182ALactones of the diazaxanthene series, their production and their use as dye-forming components for copying methodsBASF AG·Filed 1974·Granted Jan 6, 1976·6 cites·7 claims
- 0465US4976744APreparation of concentrated solutions of cationic dyes as mono-carboxylates in glycol etherBASF AG·Filed 1989·Granted Dec 11, 1990·7 cites·4 claims
- 0553US3946017ALactones of the benzaxanthere series and dye-forming components for use in duplication processesBASF AG·Filed 1974·Granted Mar 23, 1976·3 cites·6 claims
- 0652US6846956B2Triarylmethane dyesBASF AG·Filed 2001·Granted Jan 25, 2005·2 cites·27 claims
- 0751US4176229ABasic dyesBASF AG·Filed 1978·Granted Nov 27, 1979·3 cites·2 claims
- 0848US5073634ATetrachloroferrates of basic dyesBASF AG·Filed 1990·Granted Dec 17, 1991·3 cites·1 claims
- 0942US4000135AManufacture of basic dyes by catalytic oxidationBASF AG·Filed 1974·Granted Dec 28, 1976·7 cites·3 claims
- 1041US6160169APreparation of amine salts of 4-nitrotoluene-2-sulfonic acidBASF AG·Filed 1998·Granted Dec 12, 2000·2 cites·4 claims
- 1136US5892105APreparation of amine salts of 4-nitrotoluene-2-sulfonic acidBASF AG·Filed 1997·Granted Apr 6, 1999·1 cites·9 claims
- 1234US4052398ADiazarhodamine-lactones, their manufacture and their use as dye intermediates for copying processesBASF AG·Filed 1976·Granted Oct 4, 1977·4 cites·6 claims
- 1330US3997541ALactones of the benzazaxanthene series and dye-forming components for duplication processesBASF AG·Filed 1974·Granted Dec 14, 1976·1 cites·5 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →