Inventor · disambiguated record
Theodor Papenfuhs
Also filed as: PAPENFUHS THEODOR
116 granted patents·626 citations·filing 1974–1999
99Inventor score
Top patents by PatentIndex Score
116 records- 0189US6001831AProcess for producing quinazoline derivativesCLARIANT GMBH·Filed 1996·Granted Dec 14, 1999·54 cites·19 claims
- 0288US5250738AProcess for the preparation of 1,4-bis(4-hydroxybenzoyl)-benzeneHOECHST AG·Filed 1990·Granted Oct 5, 1993·35 cites·12 claims
- 0388US4172202AProcess for the preparation of 4-amino-1,8-naphthalimidesHOECHST AG·Filed 1978·Granted Oct 23, 1979·16 cites·8 claims
- 0488US4061464AProcess for the preparation of dyestuff compositionsHOECHST AG·Filed 1975·Granted Dec 6, 1977·14 cites·2 claims
- 0583US4760183AProcess for the preparation of aromatic dialkylaminesHOECHST AG·Filed 1986·Granted Jul 26, 1988·21 cites·5 claims
- 0681US5294742AProcess for preparing 3,5-difluoroanilineHOECHST ATKIENGESELLSCHAFT·Filed 1993·Granted Mar 15, 1994·20 cites·20 claims
- 0780US5616799AProcess for the preparation of glycoloylanilidesHOECHST AG·Filed 1995·Granted Apr 1, 1997·24 cites·47 claims
- 0878US3939093ADaylight fluorescent pigmentsHOECHST AG·Filed 1974·Granted Feb 17, 1976·9 cites·12 claims
- 0976US4370483AProcess for the manufacture of 2-hydroxybenzothiazolesHOECHST AG·Filed 1981·Granted Jan 25, 1983·9 cites·5 claims
- 1076US4265632AProcess for the coloration of thermoplastic polymers and polycondensates in the mass with water-insoluble disazomethine compoundsHOECHST AG·Filed 1979·Granted May 5, 1981·17 cites·14 claims
- 1175US3996192ASpin-dyeing of acrylonitrile homopolymers and copolymersHOECHST AG·Filed 1975·Granted Dec 7, 1976·14 cites·14 claims
- 1275US3970667AProcess for the preparation of pure tolutriazolesHOECHST AG·Filed 1974·Granted Jul 20, 1976·9 cites·4 claims
- 1374US4992589ASubstituted phenyl hydroxyethyl sulfones, and process for their preparationHOECHST AG·Filed 1988·Granted Feb 12, 1991·11 cites·1 claims
- 1473US4727154AProcess for the preparation of 2-substituted benzothiazolesHOECHST AG·Filed 1986·Granted Feb 23, 1988·10 cites·5 claims
- 1572US4563533AProcess for the preparation of halogen-substituted 2-aminobenzothiazolesHOECHST AG·Filed 1983·Granted Jan 7, 1986·9 cites·9 claims
- 1671US5227535AProcess for the preparation of 2-nitro-5-fluoro- or -5-chlorophenolHOECHST AG·Filed 1992·Granted Jul 13, 1993·11 cites·11 claims
- 1771US4613698AProcess for the preparation of 6-chloro-2,4-dinitroanilineHOECHST AG·Filed 1985·Granted Sep 23, 1986·10 cites·2 claims
- 1871US4246196ADiaminophenyl ureasHOECHST AG·Filed 1979·Granted Jan 20, 1981·8 cites·10 claims
- 1970US4719304AProcess for preparing 2-aminobenzothiazolesHOECHST AG·Filed 1986·Granted Jan 12, 1988·11 cites·3 claims
- 2069US4002630ANovel aromatic o-hydroxyaldehydes, a process for their preparation and their utilizationHOECHST AG·Filed 1975·Granted Jan 11, 1977·5 cites·5 claims
- 2168US4540815AProcess for the preparation of pure 3-acetylamino-anilinesHOECHST AG·Filed 1984·Granted Sep 10, 1985·9 cites·7 claims
- 2267US5384413AProcess for the preparation of tetrafluorophthalic acid and/or tetrafluorophthalic anhydrideHOECHST AG·Filed 1993·Granted Jan 24, 1995·9 cites·25 claims
- 2367US4113759AMetal-containing disazomethine compounds, process for preparing them and their use as colorantsHOECHST AG·Filed 1977·Granted Sep 12, 1978·6 cites·8 claims
- 2467US4057576AProcess for isolating 2-hydroxynaphthalene carboxylic acids from reaction mixtures of the alkali metal salts of 2-hydroxynaphthalene with carbon dioxideHOECHST AG·Filed 1975·Granted Nov 8, 1977·10 cites·8 claims
- 2565US5227545AProcess for the preparation of 2,4-dichlorofluorobenzeneHOECHST AG·Filed 1992·Granted Jul 13, 1993·9 cites·19 claims
- 2665US4294749AProcess for the coloration of thermoplastic polymers and polycondensates in the mass with water-insoluble disazo-methine compoundsHOECHST AG·Filed 1979·Granted Oct 13, 1981·11 cites·5 claims
- 2765US4097450APerinone compounds as colorants for polyolefinsHOECHST AG·Filed 1977·Granted Jun 27, 1978·11 cites·2 claims
- 2864US4658034AProcess for the preparation of 2,6-dichlorobenzoxazoleHOECHST AG·Filed 1985·Granted Apr 14, 1987·6 cites·4 claims
- 2964US4429134AProcess for the manufacture of 2(3H)-benzothiazolones substituted in 3-positionHOECHST AG·Filed 1981·Granted Jan 31, 1984·5 cites·4 claims
- 3063US5478963A2,3-difluoro-6-nitrobenzonitrile and 2-chloro-5,6-difluorobenzonitrile-(2,3-difluoro-6-chlorobenzonitrile), process for their preparation and their use for the preparation of 2,3,6-trifluorobenzoic acidHOECHST AG·Filed 1994·Granted Dec 26, 1995·7 cites·25 claims
- 3163US4064349ANovel 2-hydroxynaphthalene-1-aldehydes, process for preparing them and their useHOECHST AG·Filed 1976·Granted Dec 20, 1977·5 cites·4 claims
- 3262US4081446AProcess for the preparation of 4-amino-1,8-naphthalic acid-N-arylimidesHOECHST AG·Filed 1976·Granted Mar 28, 1978·4 cites·5 claims
- 3361US5502260AProcess for preparing multiply fluorinated nitrobenzenesHOECHST AG·Filed 1994·Granted Mar 26, 1996·7 cites·10 claims
- 3461US5498807AProcess for the preparation of aromatic fluoro compoundsHOECHST AG·Filed 1994·Granted Mar 12, 1996·13 cites·25 claims
- 3560US5498794AProcess for preparing fluoroanilinesHOECHST AG·Filed 1995·Granted Mar 12, 1996·7 cites·32 claims
- 3660US5468863AProcess for the preparation of substituted 2,3-difluoropyridinesHOECHST AG·Filed 1993·Granted Nov 21, 1995·6 cites·21 claims
- 3760US4937395AProcess for the preparation of fluorobenzenesHOECHST AG·Filed 1989·Granted Jun 26, 1990·6 cites·20 claims
- 3859US4234513AProcess for the preparation of monoaryl thioureasHOECHST AG·Filed 1979·Granted Nov 18, 1980·4 cites·6 claims
- 3959US3947512AProcess for the manufacture of aromatic sulfonic acid halidesHOECHST AG·Filed 1974·Granted Mar 30, 1976·5 cites·2 claims
- 4058US5476976AProcess for preparing fluoronitrobenzenesHOECHST AG·Filed 1994·Granted Dec 19, 1995·6 cites·15 claims
- 4157US5264633AProcess for the preparation of 1,4-bis(4-hydroxybenzoyl)benzeneHOECHST AG·Filed 1990·Granted Nov 23, 1993·6 cites·16 claims
- 4257US4157265AWater-insoluble disazomethine mixed metal-complex compounds, process for preparing them and their use as colorantsHOECHST AG·Filed 1978·Granted Jun 5, 1979·4 cites·13 claims
- 4357US4042611AWater-in-soluble disazo methine compoundsHOECHST AG·Filed 1975·Granted Aug 16, 1977·4 cites·8 claims
- 4456US5712414AHydroxycarboxylic acid anilidesHOECHST AG·Filed 1996·Granted Jan 27, 1998·6 cites·22 claims
- 4556US4808752AProcess for the preparation of 2-aminophenyl thioethersHOECHST AG·Filed 1986·Granted Feb 28, 1989·4 cites·10 claims
- 4656US4137272AProcess for the manufacture of 2-alkoxy-6-bromo-naphthalenesHOECHST AG·Filed 1977·Granted Jan 30, 1979·4 cites·1 claims
- 4755US5523472AProcess for the preparation of 5-fluoroanthranilic acidHOECHST AG·Filed 1994·Granted Jun 4, 1996·5 cites·38 claims
- 4855US5149850AProcess for the production of high-purity tetrachloro-1,4-benzoquinoneHOECHST AG·Filed 1991·Granted Sep 22, 1992·5 cites·4 claims
- 4955US4613704AProcess for the preparation of 5-hydroxyethylsulfonyl-2-aminophenol (ethers)HOECHST AG·Filed 1984·Granted Sep 23, 1986·4 cites·3 claims
- 5054US5504264AProcess for preparing 1,3-difluorobenzeneHOECHST AG·Filed 1994·Granted Apr 2, 1996·4 cites·25 claims
Showing the top 50 of 116 patent records by PatentIndex Score.
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