Inventor · disambiguated record
Eugen Konrad
Also filed as: KONRAD EUEGEN · KONRAD EUGEN
47 granted patents·1,074 citations·filing 1974–1996
99Inventor score
Top patents by PatentIndex Score
47 records- 0189US4797130AOxidative hair dye composition based on 4-amino-2-aminomethyl-phenolsWELLA AG·Filed 1986·Granted Jan 10, 1989·26 cites·12 claims
- 0288US4396392AMethod for the coloring of hairWELLA AG·Filed 1979·Granted Aug 2, 1983·56 cites·4 claims
- 0387US4528283ACosmetic composition based upon chitosan derivatives, new chitosan derivatives as well as processes for the production thereofWELLA AG·Filed 1983·Granted Jul 9, 1985·60 cites·16 claims
- 0486US4855130AHair treating compositions and processes for improving the condition of hairWELLA AG·Filed 1987·Granted Aug 8, 1989·70 cites·7 claims
- 0586US4822598ACosmetic agent on the basis of quaternary chitosan derivatives, novel quaternary chitosan derivatives as well as processes for making sameWELLA AG·Filed 1983·Granted Apr 18, 1989·48 cites·15 claims
- 0684US5021066AOxidative hair dye composition based on a gel vehicle and a process to dye hairWELLA AG·Filed 1989·Granted Jun 4, 1991·77 cites·16 claims
- 0782US4854935A5-alkoxy-2,4-diamino-alkyl-benzenes and hairdye compositions based on 5-alkoxy-2,4-diamino-alkyl-benzenesWELLA AG·Filed 1987·Granted Aug 8, 1989·16 cites·10 claims
- 0882US4725282AOxidative hair dyeing composition based upon a carrier of low viscosityWELLA AG·Filed 1985·Granted Feb 16, 1988·74 cites·10 claims
- 0982US4202881AHair shampoo and conditioning lotionWELLA AG·Filed 1978·Granted May 13, 1980·43 cites·8 claims
- 1082US4134412AHair setting lotion containing a chitosan derivativeWELLA AG·Filed 1976·Granted Jan 16, 1979·36 cites·6 claims
- 1179US4931271ACosmetic compostions based upon N-hydroxybutyl-chitosans, N-hydroxybutyl-chitosans as well as processes for the production thereofWELLA AG·Filed 1987·Granted Jun 5, 1990·27 cites·14 claims
- 1278US4883656AComposition and method for the oxidative dyeing of hairWELLA AG·Filed 1987·Granted Nov 28, 1989·55 cites·10 claims
- 1378US4660580AProcess for the permanent shaping of the regrowth of hair and composition thereforeWELLA AG·Filed 1983·Granted Apr 28, 1987·41 cites·23 claims
- 1476US3975515AReducing the alkali concentration in hair treating compositionsWELLA AG·Filed 1974·Granted Aug 17, 1976·32 cites·6 claims
- 1575US4780310ACosmetic compositions based upon N-hydroxypropyl-chitosans, new N-hyroxypropyl-chitosans, as well as processes for the production thereofWELLA AG·Filed 1986·Granted Oct 25, 1988·46 cites·10 claims
- 1673US4840639AAgent for dyeing hairWELLA AG·Filed 1988·Granted Jun 20, 1989·37 cites·9 claims
- 1773US4754069A2-alkyl sulfonyl-1,4-diaminobenzenes, processes for their production and oxidation hair dyeing compositions containing the sameWELLA AG·Filed 1985·Granted Jun 28, 1988·10 cites·11 claims
- 1871US4772689AQuaternary hydroxy-propyl-substituted chitosan derivatives, cosmetic compositions based thereon and processes for the production thereofWELLA AG·Filed 1986·Granted Sep 20, 1988·29 cites·27 claims
- 1971US4452603AProcess for dyeing hair and composition thereforWELLA AG·Filed 1979·Granted Jun 5, 1984·8 cites·11 claims
- 2067US5587174ACosmetic composition for treating skin and hair containing apple wax and methods of making themWELLA AKTIENGSELLSCHAFT·Filed 1996·Granted Dec 24, 1996·28 cites·3 claims
- 2166US4752467AHair treatment agent and method for improving the conditon of hairWELLA AG·Filed 1987·Granted Jun 21, 1988·32 cites·2 claims
- 2265US4661114A3-Amino-5-hydroxypyridine derivatives and hair coloring compositions containing the sameWELLA AG·Filed 1985·Granted Apr 28, 1987·6 cites·12 claims
- 2364US4950302AProcess for the production of 2,5-diamino-6-nitro-pyridine derivatives, their use in hair dye compositions and new 2,5-diamino-6-nitropyridine derivativesWELLA AG·Filed 1988·Granted Aug 21, 1990·5 cites·16 claims
- 2464US4921949AProcess for making quaternary chitosan derivatives for cosmetic agentsWELLA AG·Filed 1989·Granted May 1, 1990·24 cites·10 claims
- 2560US5145482AHair dye compositions based on 2,5-diamino-6-nitropyridine derivativesWELLA AG·Filed 1990·Granted Sep 8, 1992·5 cites·11 claims
- 2658US4772690AQuaternary hydroxyethyl-substituted chitosan derivatives, cosmetic compositions based thereon and processes for the production thereofWELLA AG·Filed 1986·Granted Sep 20, 1988·18 cites·27 claims
- 2756US3964499AProcess for permanently shaping hairWELLA AG·Filed 1974·Granted Jun 22, 1976·14 cites·8 claims
- 2855US4395262AHair dyeing agentWELLA AG·Filed 1979·Granted Jul 26, 1983·15 cites·11 claims
- 2953US4845204ACosmetic compositions on the basis of alkyl-hydroxypropyl-substituted chitosan derivatives, new chitosan derivatives and processes for the production thereofWELLA AG·Filed 1985·Granted Jul 4, 1989·18 cites·14 claims
- 3053US4603048AAcid tenside-anion solution of chitosan and its use in cosmetic preparationsWELLA AG·Filed 1982·Granted Jul 29, 1986·17 cites·3 claims
- 3152US4892728APumpable cationic fatty alcohol despersionHENKEL KGAA·Filed 1988·Granted Jan 9, 1990·19 cites·20 claims
- 3247US4971784APreserved hair-and body-cleaning agent and the use of a preservative combinationWELLA AG·Filed 1988·Granted Nov 20, 1990·14 cites·22 claims
- 3347US4713080AMethod and composition for the dyeing of hair with 2,6-diamino-pyridine derivativesWELLA AG·Filed 1986·Granted Dec 15, 1987·2 cites·13 claims
- 3443US4543425A1,3-Diamino-4-(2',2',2',-trifluoroethoxy)-benzene, method of producing the same, and hair coloring composition containing the sameWELLA AG·Filed 1983·Granted Sep 24, 1985·8 cites·16 claims
- 3540US5030241AUse of 2,6-dinitro-aniline derivatives in hair dyes and new 2,6-dinitro-aniline derivativesWELLA AG·Filed 1988·Granted Jul 9, 1991·7 cites·23 claims
- 3640US4835314A2-nitroaniline derivativesWELLA AG·Filed 1987·Granted May 30, 1989·7 cites·4 claims
- 3740US4835266ACosmetic compositions based upon n-hydroxypropyl-chitosans, new n-hydroxypropyl-chitosans, as well as processes for the production thereofWELLA AKTIENGSELLSCHAFT·Filed 1988·Granted May 30, 1989·7 cites·5 claims
- 3840US4588410ANovel 2-hydroxy-4-aminobenzenes, method for their manufacturing and hair coloring agents containing these compoundsWELLA AG·Filed 1982·Granted May 13, 1986·7 cites·19 claims
- 3938US4704474A1,4-diamino-5-chloro-2-nitrobenzene derivatives, processes for their production and compositions containing the same for the coloration of hairWELLA AG·Filed 1986·Granted Nov 3, 1987·6 cites·20 claims
- 4036US5037446A2-nitroaniline derivatives and hair dyeing compositions containing sameWELLA AG·Filed 1988·Granted Aug 6, 1991·4 cites·11 claims
- 4135US4921504A4-(N-ethyl-N-2-hydroxyethyl)-amino-1-(2 hydroxyethyl)-amino-2-nitrobenzene and compositions for dyeing hair containing the sameWELLA AG·Filed 1988·Granted May 1, 1990·3 cites·6 claims
- 4235US4629467AUse of p-ureidoalkylamino-nitrobenzene derivatives in hair dyeing compositions and new p-ureidoalkylamino-nitrobenzene derivativesWELLA AG·Filed 1985·Granted Dec 16, 1986·4 cites·6 claims
- 4335US4279613AMethod and composition for hair coloringWELLA AG·Filed 1979·Granted Jul 21, 1981·3 cites·12 claims
- 4434US4886516ADiaminotetrafluoroethoxybenzenes, process for producing same and hair coloring agents containing sameWELLA AG·Filed 1988·Granted Dec 12, 1989·2 cites·9 claims
- 4534US4845294ADiaminotetrafluoroethoxybenzenesWELLA AG·Filed 1988·Granted Jul 4, 1989·3 cites·9 claims
- 4634US4755188AAgent and process for the coloring of hairWELLA AG·Filed 1987·Granted Jul 5, 1988·3 cites·10 claims
- 4734US4321053AHair dyeing composition and processWELLA AG·Filed 1980·Granted Mar 23, 1982·2 cites·18 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →