Inventor · disambiguated record
Rolf Fikentscher
Also filed as: FIKENTSCHER ROLF · GOTSMANN GUENTHER · GREIF NORBERT · PERNER JOHANNES
67 granted patents·1,032 citations·filing 1973–1993
99Inventor score
Top patents by PatentIndex Score
67 records- 0197US3947287AAqueous pigment dispersionsBASF AG·Filed 1973·Granted Mar 30, 1976·61 cites·7 claims
- 0296US4816553APolyacetals, preparation thereof from dialdehydes and polyolcarboxylic acids, and use of sameBASF AG·Filed 1988·Granted Mar 28, 1989·88 cites·7 claims
- 0396US4144123AIncorporating a crosslinked polyamidoamine condensation product into paper-making pulpBASF AG·Filed 1978·Granted Mar 13, 1979·105 cites·1 claims
- 0494US4052159ADyeing process using quaternary ammonium salt as retarderBASF AG·Filed 1976·Granted Oct 4, 1977·79 cites·6 claims
- 0586US4425238ARemoval of anionic compounds from waterBASF AG·Filed 1982·Granted Jan 10, 1984·51 cites·11 claims
- 0685US4537701ADemulsifiers for breaking crude-oil emulsions and their useBASF AG·Filed 1981·Granted Aug 27, 1985·38 cites·8 claims
- 0785US4371674AWater soluble crosslinked ethyleneimine grafted polyamidoamineHERTEL OTTO·Filed 1980·Granted Feb 1, 1983·44 cites·2 claims
- 0883US5393463AUse of trialkanolamine polyethers as demulsifiers for oil-in-water emulsionsBASF AG·Filed 1993·Granted Feb 28, 1995·31 cites·1 claims
- 0983US5322915AModified melamine-formaldehyde resinsBASF AG·Filed 1992·Granted Jun 21, 1994·33 cites·5 claims
- 1082US4978780APreparation of ether sulfonates and polyglycol ether sulfonates, and products prepared by this methodBASF AG·Filed 1989·Granted Dec 18, 1990·17 cites·3 claims
- 1181US4588531APreparation of alkali metal and alkaline earth metal salts of acyloxybenzenesulfonic acidsBASF AG·Filed 1984·Granted May 13, 1986·13 cites·5 claims
- 1280US4670591APreparation of N-α-alkoxyethylformamidesBASF AG·Filed 1986·Granted Jun 2, 1987·15 cites·8 claims
- 1379US4066494ANitrogenous condensation products used as retention aids in papermakingBASF AG·Filed 1975·Granted Jan 3, 1978·25 cites·3 claims
- 1479US4025503AManufacture of aziridinecarboxylic acid estersBASF AG·Filed 1974·Granted May 24, 1977·12 cites·10 claims
- 1575US5019296ASerine-N,N-diacetic acid and derivatives as complexing agents and detergents containing sameBASF AG·Filed 1990·Granted May 28, 1991·29 cites·4 claims
- 1675US4383834AColoring of paperBASF AG·Filed 1982·Granted May 17, 1983·32 cites·6 claims
- 1774US5126395APreparation of stable water-in-oil emulsions of hydrolyzed polymers of n-vinylamidesBASF AG·Filed 1990·Granted Jun 30, 1992·37 cites·4 claims
- 1872US4888412ATanning assistantBASF AG·Filed 1988·Granted Dec 19, 1989·18 cites·4 claims
- 1967US4038296AAlkylene oxide derivatives based on polytetrahydrofuran copolymersBASF AG·Filed 1975·Granted Jul 26, 1977·12 cites·10 claims
- 2066US4695412APreparation of acyloxybenzenesulfonic acids and their alkali metal and alkaline earth metal saltsBASF AG·Filed 1986·Granted Sep 22, 1987·8 cites·9 claims
- 2162US5234626AMethods of demulsifying employing condensates as demulsifiers for oil-in water emulsionsBASF AG·Filed 1991·Granted Aug 10, 1993·13 cites·8 claims
- 2261US5015754AQuaternized condensation products of trialkanolaminesBASF AG·Filed 1989·Granted May 14, 1991·12 cites·6 claims
- 2361US4945166APreparation of N-hydroxypyrazolesBASF AG·Filed 1989·Granted Jul 31, 1990·5 cites·8 claims
- 2460US3963714AQuaternary ammonium saltsBASF AG·Filed 1974·Granted Jun 15, 1976·9 cites·11 claims
- 2559US4911888AUse of salts of sulfonamidocarboxylic acids as corrosion inhibitors in aqueous systemsBASF AG·Filed 1988·Granted Mar 27, 1990·12 cites·5 claims
- 2659US4268402ALiquefaction of aqueous textile softenersBASF AG·Filed 1979·Granted May 19, 1981·11 cites·10 claims
- 2758US4931065AAftertreatment of reactive dyeings on cellulose fibersBASF AG·Filed 1986·Granted Jun 5, 1990·10 cites·5 claims
- 2857US4973730APreparation of serine-N,N-diacetic acid and derivatives as complexing agents and detergents containing sameBASF AG·Filed 1988·Granted Nov 27, 1990·15 cites·3 claims
- 2957US4654432APreparation of 2-(hydroxymethyl)-acrylonitrile and 2-(hydroxymethyl)-acrylatesBASF AG·Filed 1985·Granted Mar 31, 1987·5 cites·14 claims
- 3052US4827014A2-Hydroxy-3-aminopropionic-n,n-diacetic acid and derivatives thereof, preparation thereof, and detergents containing sameBASF AG·Filed 1988·Granted May 2, 1989·16 cites·6 claims
- 3150US4970321APreparation of cyclic N,N'-dimethylureasBASF AG·Filed 1989·Granted Nov 13, 1990·3 cites·8 claims
- 3250US4935162AAlkoxylated amido-containing polyamines and their use for breaking oil-in-water and water-in-oil emulsionsBASF AG·Filed 1987·Granted Jun 19, 1990·12 cites·7 claims
- 3349US5534166APreparation of condensates of arenesulfonic acids and formaldehyde and use thereofBASF AG·Filed 1993·Granted Jul 9, 1996·7 cites·15 claims
- 3449US4224421AWater-soluble, crosslinked nitrogen-containing condensation productsBASF AG·Filed 1978·Granted Sep 23, 1980·11 cites·4 claims
- 3549US3988516AManufacture of bonded textile sheet structuresBASF AG·Filed 1975·Granted Oct 26, 1976·6 cites·7 claims
- 3648US4936864ACondensates of bis-(4-hydroxyphenyl) sulfone as tanning assistants, their preparation and use in the tanning of leatherBASF AG·Filed 1988·Granted Jun 26, 1990·6 cites·8 claims
- 3748US4654043ADesizing cotton and cotton-containing fabricsBASF AG·Filed 1985·Granted Mar 31, 1987·8 cites·5 claims
- 3847US5025103AGlycerol aminocarboxylates and preparation and use thereofBASF AG·Filed 1990·Granted Jun 18, 1991·3 cites·7 claims
- 3947US4705649APreparation of acyloxybenzenesulfonic acids and their alkali metal and alkaline earth metal saltsBASF AG·Filed 1986·Granted Nov 10, 1987·3 cites·10 claims
- 4047US4618371ACoating materials which contain α-hydroxyketones as antiskimming agentsBASF AG·Filed 1985·Granted Oct 21, 1986·10 cites·6 claims
- 4147US4488879AProcess for dyeing textile materials of polyacrylonitrile: quaternized piperazine copolymer as basic dye retarderBASF AG·Filed 1983·Granted Dec 18, 1984·6 cites·11 claims
- 4247US4049851AManufacture of bonded textile sheet materialsBASF AG·Filed 1976·Granted Sep 20, 1977·5 cites·3 claims
- 4346US4128511AWater-soluble, crosslinked nitrogenous condensation products produced by reaction of chlorohydrin-ethers with ethyleneimineBASF AG·Filed 1977·Granted Dec 5, 1978·6 cites·3 claims
- 4445US5017725APreparation of addition salts of cysteamine with acidsBASF AG·Filed 1990·Granted May 21, 1991·3 cites·3 claims
- 4545US4614613APreparation of β-N-aziridinopropionatesBASF AG·Filed 1984·Granted Sep 30, 1986·2 cites·7 claims
- 4645US4200733AIodine-containing block copolymers of 1,4-butylene oxide and ethylene oxideBASF AG·Filed 1979·Granted Apr 29, 1980·9 cites·3 claims
- 4745US4052384AManufacture of aziridinocarboxylic acid estersBASF AG·Filed 1976·Granted Oct 4, 1977·2 cites·5 claims
- 4844US4178217AZinc electroplating bathBASF AG·Filed 1978·Granted Dec 11, 1979·5 cites·3 claims
- 4943US4704132AAfter-treatment of dyeings with reactive dyes on cellulose fiber materialsBASF AG·Filed 1986·Granted Nov 3, 1987·5 cites·4 claims
- 5043US4135992AZinc electroplating bathBASF AG·Filed 1977·Granted Jan 23, 1979·5 cites·2 claims
Showing the top 50 of 67 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →