Inventor · disambiguated record
Gunter Siegemund
Also filed as: SIEGEMUND GUENTER · SIEGEMUND GUNTER
54 granted patents·360 citations·filing 1976–1998
98Inventor score
Top patents by PatentIndex Score
54 records- 0188US4547483ACatalysts for fluorination and/or dismutation reactions on halogenated hydrocarbons, and a process for their preparationHOECHST AG·Filed 1984·Granted Oct 15, 1985·24 cites·6 claims
- 0286US5254771AProcess for the preparation of 1,1,1-trifluoro-2-2-dichloroethane under elevated pressureHOECHST AG·Filed 1993·Granted Oct 19, 1993·34 cites·17 claims
- 0383US4287124AProcess for the preparation of 4,5-perfluoro-1,3-dioxalanesHOECHST AG·Filed 1980·Granted Sep 1, 1981·19 cites·5 claims
- 0477US4088701A1,2,2,2-tetrafluoroethyl-fluoromethyl ether and process for preparing itHOECHST AG·Filed 1976·Granted May 9, 1978·10 cites·1 claims
- 0575US5028728AProcess for the preparation of reaction products of 2,2-bis-(4-hydroxphenyl)-hexafluoropropane and new derivatives of this typeHOECHST AG·Filed 1990·Granted Jul 2, 1991·13 cites·3 claims
- 0673US5969199AProcess for the addition of HF to halogenated alkenesSOLVAY·Filed 1998·Granted Oct 19, 1999·12 cites·32 claims
- 0773US4968848AProcess of the prparation of perfluoroalkyl compounds, and pentafluoroethyltrimethylsilaneHOECHST AG·Filed 1989·Granted Nov 6, 1990·13 cites·13 claims
- 0872US5847245AProcess for the addition of HF to halogenated alkenesSOLVAY·Filed 1996·Granted Dec 8, 1998·11 cites·23 claims
- 0972US4623491AProcess for the preparation of halogenated aliphatic carboxylic acid fluoridesHOECHST AG·Filed 1985·Granted Nov 18, 1986·10 cites·14 claims
- 1070US5004797APartly fluorinated carboxylic acids and derivatives thereof, processes for their preparation and their useHOECHST AG·Filed 1988·Granted Apr 2, 1991·9 cites·23 claims
- 1168US5399795AProcess for the preparation of 2-H-heptafluoropropaneHOECHST AG·Filed 1994·Granted Mar 21, 1995·9 cites·5 claims
- 1268US5110983AHexafluoroisopropyl-containing monomers, process for their preparation and their useHOECHST AG·Filed 1990·Granted May 5, 1992·10 cites·1 claims
- 1367US4922019ADerivatives of 2,2-bis-(3-aminophenyl)hexafluoropropane and process for the preparation of 2,2-bis-(3,4-diaminophenyl)hexafluoropropaneHOECHST AG·Filed 1988·Granted May 1, 1990·8 cites·16 claims
- 1467US4727142AProcess for the preparation of imidatesHOECHST AG·Filed 1986·Granted Feb 23, 1988·9 cites·13 claims
- 1566US5728884AProcess for the work-up of complex amine hydrofluroidesSOLVAY·Filed 1995·Granted Mar 17, 1998·10 cites·19 claims
- 1665US5534634AProcess for preparing trifluoroethyl sulfur compounds from thiolates and 1-chloro-2,2,2-trifluoroethaneHOECHST AG·Filed 1994·Granted Jul 9, 1996·9 cites·16 claims
- 1765US4400546AProcess for the preparation of hexafluoroacetone and direct use of the solution obtained by the processHOECHST AG·Filed 1981·Granted Aug 23, 1983·8 cites·6 claims
- 1864US5198925Aα-fluoroacrylic acid esters and polymers thereofHOECHST AG·Filed 1992·Granted Mar 30, 1993·8 cites·5 claims
- 1963US4524031AFluorosulfatoperfluorocarbonyl compoundsHOECHST AG·Filed 1983·Granted Jun 18, 1985·5 cites·3 claims
- 2061US5739070AProcess for regenerating a fluorination catalystSOLVAY·Filed 1995·Granted Apr 14, 1998·24 cites·20 claims
- 2160US4874557AProcess for the preparation of perfluorinated carbonyl fluoridesHOECHST AG·Filed 1988·Granted Oct 17, 1989·6 cites·8 claims
- 2258US4973749AProcess for the dimerization of hexafluoropropene oxideHOECHST AG·Filed 1990·Granted Nov 27, 1990·6 cites·17 claims
- 2357US5659078AProcess for the preparation of trichloroacetyl chlorideHOECHST AG·Filed 1995·Granted Aug 19, 1997·6 cites·8 claims
- 2456US5672748AProcess for preparing trifluoroacetyl fluorideSOLVAY·Filed 1995·Granted Sep 30, 1997·6 cites·20 claims
- 2555US5157172AProcess for the preparation of 1,1,1-trifluoro-2-chloroethaneHOECHST AG·Filed 1992·Granted Oct 20, 1992·5 cites·8 claims
- 2655US4924014AProcess for the preparation of halogen-containing aromatic compoundsHOECHST AG·Filed 1989·Granted May 8, 1990·5 cites·26 claims
- 2754US4343749AProcess for the preparation of monohydroperfluoroalkane-sulfonic acid halides and some specific representatives of this class of compoundHOECHST AG·Filed 1981·Granted Aug 10, 1982·4 cites·5 claims
- 2853US5471002AProcess for preparing trifluoromethylanilinesFiled 1994·Granted Nov 28, 1995·9 cites·14 claims
- 2952US4343742AProcess for the manufacture of 2,3-perfluoro-1,4-dioxanes as well as some special representatives of compounds of this classHOECHST AG·Filed 1981·Granted Aug 10, 1982·3 cites·6 claims
- 3051US5319131Aα-fluoroacrylic acid esters and polymers thereofHOECHST AG·Filed 1993·Granted Jun 7, 1994·4 cites·12 claims
- 3151US4992593APartially fluorinated diphenyl ethers, processes for their preparation and their useHOECHST AG·Filed 1988·Granted Feb 12, 1991·3 cites·6 claims
- 3249US5684193AProcess for the preparation of perfluoropropionyl fluorideHOECHST AG·Filed 1996·Granted Nov 4, 1997·4 cites·10 claims
- 3348US5118874APartially fluorinated biphenyls, processes for their preparation and their useHOECHST AG·Filed 1991·Granted Jun 2, 1992·3 cites·21 claims
- 3448US4603111APreparation of biocatalysts in bead formHOECHST AG·Filed 1983·Granted Jul 29, 1986·7 cites·15 claims
- 3546US5274126APartially fluorinated tetracarboxylic acid and the dianhydride thereof, a process for their preparation and their useHOECHST AG·Filed 1992·Granted Dec 28, 1993·3 cites·25 claims
- 3646US5266668ASubstituted phenyl α-fluoroacrylatesHOECHST AG·Filed 1993·Granted Nov 30, 1993·3 cites·5 claims
- 3745US4454072AProcess for the preparation of ω-fluorosulfatoperfluoroalkanoic acid derivativesHOECHST AG·Filed 1982·Granted Jun 12, 1984·2 cites·8 claims
- 3844US5017719AEsters of arylbisperfluoroalkylcarbinols, and a process for the preparation of these compoundsHOECHST AG·Filed 1988·Granted May 21, 1991·3 cites·35 claims
- 3943US4578369AProcess for the regeneration of fluorination catalystsHOECHST AG·Filed 1985·Granted Mar 25, 1986·7 cites·5 claims
- 4042US4469641AOmega-fluorosulfato-perfluoro-(2-methyl-alkan-3-ones)HOECHST AG·Filed 1983·Granted Sep 4, 1984·1 cites·3 claims
- 4141US5288908AProcess for the preparation of fluorine containing monomersHOECHST AG·Filed 1993·Granted Feb 22, 1994·2 cites·15 claims
- 4241US5087748AProcess for the continuous oligomerization of hexafluoropropene oxideHOECHST AG·Filed 1990·Granted Feb 11, 1992·2 cites·8 claims
- 4338US5153334APartially fluorinated tetracarboxylic acid and the dianhydride thereofHOECHST AG·Filed 1991·Granted Oct 6, 1992·1 cites·1 claims
- 4438US4774370AProcess for preparing 2,2-bis-(3-nitrophenyl)-hexafluoropropane, and 2,2-bis-(4-carboxy-3-nitrophenyl)-hexafluoropropane occurring as an intermediateHOECHST AG·Filed 1987·Granted Sep 27, 1988·1 cites·7 claims
- 4537US4968845AProcess for the preparation of halogen-containing aromatic compoundsHOECHST AG·Filed 1989·Granted Nov 6, 1990·1 cites·21 claims
- 4636US4978790A4,4'-bis[2-(4-hydroxy-amino-phenyl)hexafluoroisopropyl]-diphenylethers and their useHOECHST AG·Filed 1988·Granted Dec 18, 1990·2 cites·6 claims
- 4736US4532366APerfluorinated vinyl ethers containing a secondary hydrogen atom, polymers formed therefrom and a process for the preparation of the monomersHOECHST AG·Filed 1983·Granted Jul 30, 1985·2 cites·9 claims
- 4835US4835318AProcess for the preparation of aryl perfluoroalkyl ketonesHOECHST AG·Filed 1988·Granted May 30, 1989·2 cites·18 claims
- 4933US4966987AFluoro-containing 1-arylalkoxytris(dialkylamino)phosphonium salt, a process for their preparation and their useHOECHST AG·Filed 1989·Granted Oct 30, 1990·1 cites·14 claims
- 5033US4603017AFluorosulfonate containing polyfluorocarbonyl compoundsHOECHST ATKIENGESELLSCHAFT·Filed 1985·Granted Jul 29, 1986·0 cites·3 claims
Showing the top 50 of 54 patent records by PatentIndex Score.
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