Inventor · disambiguated record
Klaus Gehrmann
Also filed as: GEHRMANN KLAUS · GEHRMANN KLAUS DR · OHORODNIK ALEXANDER
45 granted patents·580 citations·filing 1973–1994
98Inventor score
Files withHOECHST AG45
Top patents by PatentIndex Score
45 records- 0194US4280010AContinuous production of alkyl acrylates free from etherHOECHST AG·Filed 1979·Granted Jul 21, 1981·44 cites·11 claims
- 0293US4003723APurification of crude hydrogen chlorideHOECHST AG·Filed 1976·Granted Jan 18, 1977·57 cites·11 claims
- 0392US4664753AProcess for separating iodine and its compounds from the carbonylation products obtained by subjecting dimethylether, methyl acetate or methanol to a carbonylation reactionHOECHST AG·Filed 1984·Granted May 12, 1987·31 cites·8 claims
- 0491US4430273AProduction of acetic anhydrideHOECHST AG·Filed 1982·Granted Feb 7, 1984·35 cites·7 claims
- 0590US3954854ARecovery of monomeric acrylic acid from residues originating from processed crude acrylic acidHOECHST AG·Filed 1975·Granted May 4, 1976·29 cites·4 claims
- 0687US4333884AProduction of acetic anhydrideHOECHST AG·Filed 1980·Granted Jun 8, 1982·26 cites·7 claims
- 0785US5380929AProcess for the preparation of acetic acid and acetic anhydrideHOECHST AG·Filed 1994·Granted Jan 10, 1995·29 cites·7 claims
- 0885US4101573AProduction of methyldichlorophosphaneHOECHST AG·Filed 1977·Granted Jul 18, 1978·17 cites·3 claims
- 0983US4444624AProcess for separating acetone from carbonylation mixturesHOECHST AG·Filed 1982·Granted Apr 24, 1984·18 cites·10 claims
- 1083US4012439AContinuous production of n-butylacrylate free from dibutyletherHOECHST AG·Filed 1975·Granted Mar 15, 1977·21 cites·1 claims
- 1180US4556644AProcess for purifying and recovering contaminated catalyst solution obtained in the carbonylation of methyl acetate and/or dimethyletherHOECHST AG·Filed 1982·Granted Dec 3, 1985·32 cites·6 claims
- 1280US4022826AProduction of beta-halogenoformyl-ethyl phosphinic acid halidesHOECHST AG·Filed 1976·Granted May 10, 1977·13 cites·2 claims
- 1379US4717454AProcess for removing acetone from reaction mixtures of carbonylation reactionsHOECHST AG·Filed 1985·Granted Jan 5, 1988·17 cites·5 claims
- 1476US4442304AProcess for purifying and recovering contaminated catalyst solution obtained in the carbonylation of methyl acetate and/or dimethyletherHOECHST AG·Filed 1982·Granted Apr 10, 1984·12 cites·14 claims
- 1576US4206078AProduction of space abrasion-resistant active carbon carriers or catalystsHOECHST AG·Filed 1978·Granted Jun 3, 1980·24 cites·5 claims
- 1675US4016048ADistillative purification of 2,5-dioxo-1-oxa-2-phospholanesHOECHST AG·Filed 1976·Granted Apr 5, 1977·10 cites·4 claims
- 1773US4104304AProduction of methyldichlorophosphaneHOECHST AG·Filed 1977·Granted Aug 1, 1978·10 cites·6 claims
- 1871US4557760AProcess for recovering noble metals belonging to group VIII of the Periodic System of the elements from a contaminated catalyst solution originating from the carbonylation of methyl acetate and/or dimethyletherHOECHST AG·Filed 1984·Granted Dec 10, 1985·22 cites·6 claims
- 1970US4746640AProcess for purifying and recovering catalyst solution contaminated during the carbonylation of methyl acetate and/or dimethyletherHOECHST AG·Filed 1987·Granted May 24, 1988·10 cites·5 claims
- 2069US4629711AProcess for purifying and recovering contaminated catalyst solution obtained in the carbonylation of methyl acetate and/or dimethyletherHOECHST AG·Filed 1986·Granted Dec 16, 1986·23 cites·6 claims
- 2168US4414160AProcess for making carboxylic acid halidesHOECHST AG·Filed 1981·Granted Nov 8, 1983·8 cites·5 claims
- 2268US4062888AContinuous production of 2,5-dioxo-1-oxa-2-phospholanesHOECHST AG·Filed 1976·Granted Dec 13, 1977·7 cites·1 claims
- 2367US4518538AProcess for making methyldichlorophosphaneHOECHST AG·Filed 1982·Granted May 21, 1985·7 cites·1 claims
- 2466US4260520ACarrier-supported catalyst and process for making itHOECHST AG·Filed 1979·Granted Apr 7, 1981·6 cites·9 claims
- 2563US4549937AProcess for separating the catalyst system from the reaction mixtures of carbonylation reactionsHOECHST AG·Filed 1982·Granted Oct 29, 1985·7 cites·4 claims
- 2659US4549995AProcess for making alkanephosphonous acid estersHOECHST AG·Filed 1983·Granted Oct 29, 1985·5 cites·4 claims
- 2759US3978146AProduction of 2-chlorobutadiene-1,3HOECHST AG·Filed 1975·Granted Aug 31, 1976·6 cites·8 claims
- 2858US4543217AProcess for making carboxylic acid halidesHOECHST AG·Filed 1983·Granted Sep 24, 1985·5 cites·4 claims
- 2955US5169982AProcess for separating iodine and its compounds from the products obtained on subjecting dimethylether, methyl acetate or methanol to carbonylationHOECHST AG·Filed 1986·Granted Dec 8, 1992·6 cites·9 claims
- 3055US4252983AProduction of acetic anhydride and acetic acid from acetaldehydeHOECHST AG·Filed 1978·Granted Feb 24, 1981·4 cites·3 claims
- 3154US4560518AProcess for the continuous production of 2-carboxyethyl-alkyl-phosphinic acid dialkylestersHOECHST AG·Filed 1983·Granted Dec 24, 1985·4 cites·8 claims
- 3253US4104299AProduction of pure methyldichlorophosphaneHOECHST AG·Filed 1977·Granted Aug 1, 1978·3 cites·7 claims
- 3352US3957899AProduction of monovinylacetyleneHOECHST AG·Filed 1974·Granted May 18, 1976·4 cites·4 claims
- 3450US4440570AProcess for purifying and recovering contaminated catalyst solution obtained in the carbonylation of methyl acetate and/or dimethyletherHOECHST AG·Filed 1982·Granted Apr 3, 1984·9 cites·7 claims
- 3545US4045295APurification of sulfuric acid containing acetic acidHOECHST AG·Filed 1976·Granted Aug 30, 1977·6 cites·6 claims
- 3644US4319038AProduction of 1,1-diacetoxyethaneHOECHST AG·Filed 1980·Granted Mar 9, 1982·3 cites·3 claims
- 3744US3985800AProcess for the manufacture of acrylic acidHOECHST AG·Filed 1973·Granted Oct 12, 1976·2 cites·5 claims
- 3840US4308175ACarrier-supported catalyst and process for making itHOECHST AG·Filed 1979·Granted Dec 29, 1981·5 cites·3 claims
- 3939US4261923AProcess permitting the deposition of solid matter in mixtures containing methyldichlorophosphane to be inhibitedHOECHST AG·Filed 1980·Granted Apr 14, 1981·1 cites·3 claims
- 4037US4318865AProduction of 2-chloroformylethylmethylphosphinic acid chloridesHOECHST AG·Filed 1980·Granted Mar 9, 1982·1 cites·6 claims
- 4136US4898966AProcess for the preparation of phenylalanine n-propyl ester hydrochlorideHOECHST AG·Filed 1988·Granted Feb 6, 1990·1 cites·4 claims
- 4232US4209460AProduction of pure acetyl chlorideHOECHST AG·Filed 1978·Granted Jun 24, 1980·0 cites·2 claims
- 4331US4892971AProcess for the preparation of n-acetylphenylalanineHOECHST AG·Filed 1988·Granted Jan 9, 1990·0 cites·3 claims
- 4430US4351972AProcess for making anhydrous alkyl iodidesHOECHST AG·Filed 1981·Granted Sep 28, 1982·0 cites·4 claims
- 4525US4352761AProduction of acetyl chlorideHOECHST AG·Filed 1981·Granted Oct 5, 1982·0 cites·5 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →