Inventor · disambiguated record
Norbert Maak
Also filed as: MAAK NORBERT
21 granted patents·194 citations·filing 1980–1988
95Inventor score
Files withHENKEL KGAA21
Top patents by PatentIndex Score
21 records- 0189US4745652ANew tetra-aminopyrimidine derivatives and their use in hair-dyeing preparationsHENKEL KGAA·Filed 1987·Granted May 24, 1988·28 cites·15 claims
- 0270US4685931AAcrylate dispersion and its use for thickening hydrogen peroxide preparationsHENKEL KGAA·Filed 1985·Granted Aug 11, 1987·29 cites·24 claims
- 0365US4341559ABinders based upon solutions of alkali metal silicatesHENKEL KGAA·Filed 1980·Granted Jul 27, 1982·20 cites·10 claims
- 0458US4487607AOxidation hair dyes containing 5-halo-2,3-pyridine-diols as coupler componentsHENKEL KGAA·Filed 1982·Granted Dec 11, 1984·20 cites·11 claims
- 0555US4976742AMETA-aminophenols useful as oxidation hair dye couplersHENKEL KGAA·Filed 1988·Granted Dec 11, 1990·17 cites·16 claims
- 0648US4900325AHair-dyeing preparationsHENKEL KGAA·Filed 1988·Granted Feb 13, 1990·13 cites·20 claims
- 0748US4784667AOxidation hair dyes comprising diamino-substituted pyridines and amino-substituted aromatics as precursorsHENKEL KGAA·Filed 1985·Granted Nov 15, 1988·14 cites·8 claims
- 0844US4838893AOxidation hair dyes comprising substituted dihydroxypyridines as coupling componentsHENKEL KGAA·Filed 1987·Granted Jun 13, 1989·10 cites·22 claims
- 0938US4619666AHair dyes containing amino-nitrobenzoic acid or amino-nitrobenzene sulfonic acids as substantive dyesHENKEL KGAA·Filed 1985·Granted Oct 28, 1986·7 cites·15 claims
- 1037US4842612AAminophenyl alkylenediamines useful in oxidation hair dyesHENKEL KGAA·Filed 1988·Granted Jun 27, 1989·6 cites·25 claims
- 1137US4402699ACoupler components for the oxidation of hair dyes and their use, as well as hair dyeing agents containing themHENKEL KGAA·Filed 1981·Granted Sep 6, 1983·4 cites·15 claims
- 1236US4371370AOxidation hair dyes comprising bis-(2,4-diaminophenoxy)-alkanols as coupling componentsHENKEL KGAA·Filed 1981·Granted Feb 1, 1983·6 cites·7 claims
- 1334US4552565AHair dyes: diresorcyl sulphide, sulphoxide or sulphone coupling agentsHENKEL KGAA·Filed 1984·Granted Nov 12, 1985·2 cites·18 claims
- 1434US4541869AProcess for forming foundry componentsHENKEL KGAA·Filed 1983·Granted Sep 17, 1985·5 cites·10 claims
- 1533US4698066AAmine oxidation dye hair treating compositionsHENKEL KGAA·Filed 1986·Granted Oct 6, 1987·4 cites·34 claims
- 1632US4859206AHair dye preparations containing nitrodiphenylamine derivativeHENKEL KGAA·Filed 1988·Granted Aug 22, 1989·2 cites·34 claims
- 1731US4832697AHair dye preparations containing substantive nitrodiphenylamine derivativesHENKEL KGAA·Filed 1988·Granted May 23, 1989·2 cites·29 claims
- 1830US4756716APreparations containing substantive nitrodiphenylamine derivative hair dyesHENKEL KGAA·Filed 1986·Granted Jul 12, 1988·2 cites·36 claims
- 1929US4900327APreparations containing substantive nitrodiphenylamine derivative hair dyesHENKEL KGAA·Filed 1988·Granted Feb 13, 1990·0 cites·22 claims
- 2029US4756715AHair-dyeing preparations containing substantive nitrodiphenylamine derivativesHENKEL KGAA·Filed 1986·Granted Jul 12, 1988·1 cites·36 claims
- 2128US4684371AOxidation hair dyes comprising m-phenylenediamine derivatives as coupling componentsHENKEL KGAA·Filed 1985·Granted Aug 4, 1987·2 cites·5 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →