Inventor · disambiguated record
Hubertus Psaar
Also filed as: PSAAR HUBERTUS
30 granted patents·206 citations·filing 1974–1990
96Inventor score
Top patents by PatentIndex Score
30 records- 0189US5130442AChromogenic enamine compounds, their preparation and use as color formersBAYER AG·Filed 1990·Granted Jul 14, 1992·36 cites·7 claims
- 0280US5094688ATriarylmethane color-forming agentsBAYER AG·Filed 1988·Granted Mar 10, 1992·22 cites·9 claims
- 0378US4783196AHighly concentrated stable solutions of color-forming agents: for pressure-sensitive recording materialsBAYER AG·Filed 1987·Granted Nov 8, 1988·19 cites·5 claims
- 0476US4897494ABis(indolyl)ethylene processBAYER AG·Filed 1988·Granted Jan 30, 1990·10 cites·7 claims
- 0575US4923641AHighly concentrated stable solutions of color-forming agent: for pressure-sensitive recording materialsBAYER AG·Filed 1988·Granted May 8, 1990·16 cites·1 claims
- 0673US4125717AProcess for the preparation of oxazine dyestuffsBAYER AG·Filed 1977·Granted Nov 14, 1978·8 cites·1 claims
- 0772US4138570AIndoline linked to 2-pyrazolineBAYER AG·Filed 1976·Granted Feb 6, 1979·8 cites·1 claims
- 0870US3992140APrinting inks for transfer printingBAYER AG·Filed 1974·Granted Nov 16, 1976·6 cites·3 claims
- 0969US3999939ATransfer printing processBAYER AG·Filed 1974·Granted Dec 28, 1976·6 cites·7 claims
- 1060US4931567ABis(indolyl)ethylene compoundsBAYER AG·Filed 1989·Granted Jun 5, 1990·4 cites·3 claims
- 1160US3972879AProcess for isolating easily soluble basic oxazine dyestuffs and phenazine dyestuffsBAYER AG·Filed 1974·Granted Aug 3, 1976·4 cites·6 claims
- 1257US4847177AFanal pigments of closed-ring dry toners containing indamine-and diphenylmethane dyestuffsBAYER AG·Filed 1988·Granted Jul 11, 1989·10 cites·9 claims
- 1356US4211436APressure-sensitive recording materialBAYER AG·Filed 1978·Granted Jul 8, 1980·13 cites·10 claims
- 1455US4897223ATri-phenyl methyl color-forming agentsBAYER AG·Filed 1988·Granted Jan 30, 1990·7 cites·2 claims
- 1551US4869989ADry toners containing fanal pigments based on cationic dyesBAYER AG·Filed 1988·Granted Sep 26, 1989·8 cites·6 claims
- 1647US4083680APrinting inks for transfer printingBAYER AG·Filed 1976·Granted Apr 11, 1978·3 cites·2 claims
- 1746US4902806ABis(indolyl)ethylene aldehydesBAYER AG·Filed 1988·Granted Feb 20, 1990·2 cites·7 claims
- 1846US4600930ARecording material which reacts under the influence of heat, its preparation and the use of acid-modified polymers as acceptors in this recording materialBAYER AG·Filed 1984·Granted Jul 15, 1986·4 cites·10 claims
- 1946US4458009AProcess for the production of color photographic images and photographic recording materialsAGFA GEVAERT AG·Filed 1983·Granted Jul 3, 1984·10 cites·17 claims
- 2045US4087241APrinting inks for transfer printingBAYER AG·Filed 1976·Granted May 2, 1978·2 cites·1 claims
- 2143US4201707AMethine dyestuffs containing a phenyl azo groupBAYER AG·Filed 1978·Granted May 6, 1980·2 cites·5 claims
- 2242US4918048AThermoreactive recording materialBAYER AG·Filed 1988·Granted Apr 17, 1990·3 cites·8 claims
- 2338US5118814ATetraindolyl-heptamethine derivativesBAYER AG·Filed 1989·Granted Jun 2, 1992·1 cites·4 claims
- 2433US5134113AThermoreactive recording materialBAYER AG·Filed 1990·Granted Jul 28, 1992·1 cites·2 claims
- 2532US4017484ACationic dyestuffsBAYER AG·Filed 1975·Granted Apr 12, 1977·0 cites·3 claims
- 2631US4849306ADry toners containing methinefanal pigmentsBAYER AG·Filed 1988·Granted Jul 18, 1989·1 cites·9 claims
- 2731US4808719A1H-imidazo[2,3-a]indol-2-ones as color-forming agentsBAYER AG·Filed 1987·Granted Feb 28, 1989·0 cites·5 claims
- 2831US4145537ACationic dyestuffsBAYER AG·Filed 1974·Granted Mar 20, 1979·0 cites·5 claims
- 2930US4143228APyrazolinyl indolium dyestuffsBAYER AG·Filed 1977·Granted Mar 6, 1979·0 cites·5 claims
- 3030US4007172ADyestuff including pyrimido-indole moietyBAYER AG·Filed 1976·Granted Feb 8, 1977·0 cites·6 claims
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