Inventor · disambiguated record
Helmut Springer
Also filed as: FEICHTINGER HANS · SPRINGER HELMUT · SPRINGER HELMUT A · WEBER JURGEN
46 granted patents·3 pending applications·385 citations·filing 1978–2007
98Inventor score
Top patents by PatentIndex Score
49 records- 0193US4483802AProcess for the preparation of sulfonated aryl phosphineRUHRCHEMIE AG·Filed 1983·Granted Nov 20, 1984·36 cites·11 claims
- 0291US7799945B2Catalytic process for preparing aliphatic straight-chain and β-alkyl-branched carboxylic acidsOXEA DEUTSCHLAND GMBH·Filed 2007·Granted Sep 21, 2010·12 cites·18 claims
- 0388US4172091AProcess for the manufacture of β-(dimethylamino)-propionitrileRUHRCHEMIE AG·Filed 1978·Granted Oct 23, 1979·20 cites·9 claims
- 0484US6800783B2Method for the synthesis of aliphatic carboxylic acids from aldehydesCELANESE CHEM EUROPE GMBH·Filed 2001·Granted Oct 5, 2004·13 cites·12 claims
- 0584US4283564AProcess for preparing methacroleinRUHRCHEMIE AG·Filed 1979·Granted Aug 11, 1981·18 cites·14 claims
- 0683US7138544B2Process for preparing aliphatic straight-chain and beta-alkyl-branched carboxylic acidsCELANESE CHEM EUROPE GMBH·Filed 2005·Granted Nov 21, 2006·10 cites·17 claims
- 0783US7015362B2Process for preparing TCD-dialdehydeCELANESE CHEM EUROPE GMBH·Filed 2004·Granted Mar 21, 2006·13 cites·13 claims
- 0879US4515986AProcess for preparing 3-dimethylamino-2,2-dimethylpropanalRUHRCHEMIE AG·Filed 1981·Granted May 7, 1985·14 cites·11 claims
- 0977US4205013AProcess for the manufacture of 2,3-dimethylpentanalRUHRCHEMIE AG·Filed 1978·Granted May 27, 1980·10 cites·8 claims
- 1076US6680395B2Method for the synthesis of straight-chain aliphatic carboxylic acids from aldehydesCELANESE CHEM EUROPE GMBH·Filed 2001·Granted Jan 20, 2004·7 cites·13 claims
- 1174US6288288B1Process for preparing saturated alcoholsCELANESE GMBH·Filed 1998·Granted Sep 11, 2001·14 cites·6 claims
- 1274US5264600AProcess for the recovery of rhodium from residues of the distillation of products of the oxo synthesisHOECHST AG·Filed 1992·Granted Nov 23, 1993·32 cites·17 claims
- 1373US6939997B2Process for preparing TCD-alcohol DMCELANESE CHEM EUROPE GMBH·Filed 2004·Granted Sep 6, 2005·6 cites·17 claims
- 1473US6423856B1Process for preparing ester plasticizersCELANESE CHEM EUROPE GMBH·Filed 2000·Granted Jul 23, 2002·14 cites·9 claims
- 1573US5481044AProcess for the preparation of α-alkyl substituted aldehydesHOECHST AG·Filed 1994·Granted Jan 2, 1996·12 cites·17 claims
- 1673US4710321AQuaternary ammonium salts of sulfonated triarylphosphines and process for the production thereofRUHRCHEMIE AG·Filed 1987·Granted Dec 1, 1987·10 cites·20 claims
- 1771US7358385B2Bicyclo[4.3.0]nonane-3(4),7(8)-dicarboxylic acid and a process for its preparationOXEA DEUTSCHLAND GMBH·Filed 2007·Granted Apr 15, 2008·2 cites·16 claims
- 1871US6696582B2Method for producing aliphatic carboxylic acids from aldehydesCELANESE CHEM EUROPE GMBH·Filed 2001·Granted Feb 24, 2004·9 cites·16 claims
- 1971US4950800AProcess for the preparaton of 2-methylbutanalHOECHST AG·Filed 1988·Granted Aug 21, 1990·9 cites·27 claims
- 2070US4330262AWalking beam furnaceITALIMPIANTI·Filed 1980·Granted May 18, 1982·15 cites·8 claims
- 2167US7122706B2Process for preparing TCD-monenalCELANESE CHEM EUROPE GMBH·Filed 2004·Granted Oct 17, 2006·4 cites·12 claims
- 2267US6982352B2Process for preparing N-methyldialkylamines from secondary dialkylamines and formaldehydeCELANESE CHEM EUROPE GMBH·Filed 2004·Granted Jan 3, 2006·8 cites·7 claims
- 2367US4317945AProcess for preparing 2-methyl-2-sec.butyl-1,3-propanediolRUHRCHEMIE AG·Filed 1980·Granted Mar 2, 1982·8 cites·18 claims
- 2466US5354911AProcess for the preparation of unsaturated ethersHOECHST AG·Filed 1994·Granted Oct 11, 1994·8 cites·17 claims
- 2562US4288643AProcess for preparing 2,3-dimethyl-butene-2RUHRCHEMIE AG·Filed 1980·Granted Sep 8, 1981·6 cites·19 claims
- 2662US4263460AProcess for preparing methyl-nonyl-acetaldehydeRUHRCHEMIE AG·Filed 1979·Granted Apr 21, 1981·5 cites·1 claims
- 2759US5064508AProcess for the separation of 2-methylalkanals from isomers thereofHOECHST AG·Filed 1990·Granted Nov 12, 1991·6 cites·25 claims
- 2858US7317128B2Process for preparing TCD-diamineOXEA DEUTSCHLAND GMBH·Filed 2004·Granted Jan 8, 2008·2 cites·13 claims
- 2956US4918247AProcess for the preparation of 2,2-dimethylpropanediol-1,3RUHRCHEMIE AG·Filed 1989·Granted Apr 17, 1990·5 cites·13 claims
- 3055US5091546ANovel rhodium recoveryHOECHST AG·Filed 1990·Granted Feb 25, 1992·5 cites·14 claims
- 3155US5072037AProcess for the preparation of 2-(4-chlorophenyl)-3-methylbutyric acidHOECHST AG·Filed 1990·Granted Dec 10, 1991·5 cites·21 claims
- 3254US5072058AProcess for the preparation of 2,2-dimethylpropane-1,3-diolHOECHST AG·Filed 1990·Granted Dec 10, 1991·5 cites·20 claims
- 3351US4307252A2-Propyl-pent-4-en-1-alRUHRCHEMIE AG·Filed 1980·Granted Dec 22, 1981·5 cites·2 claims
- 3450US4885383AProcess for the preparation of carboxylic acid methyl estersHOECHST AG·Filed 1988·Granted Dec 5, 1989·3 cites·13 claims
- 3547US7342135B23(4),7(8)-Bis(aminomethyl)bicyclo[4.3.0]nonane and a process for its preparationCELANESE CHEM EUROPE GMBH·Filed 2007·Granted Mar 11, 2008·0 cites·15 claims
- 3647US4648837AWalking beam furnaceITALIMPIANTI·Filed 1985·Granted Mar 10, 1987·12 cites·3 claims
- 3746US5085835AProcess for recovering rhodiumHOECHST AG·Filed 1991·Granted Feb 4, 1992·10 cites·69 claims
- 3846US4317925AProcess for the production of di-n-propylacetic acidRUHRCHEMIE AG·Filed 1979·Granted Mar 2, 1982·2 cites·3 claims
- 3943US4270008A2-Propyl-pent-4-en-1-alRUHRCHEMIE AG·Filed 1979·Granted May 26, 1981·2 cites·2 claims
- 4041US2006058561A1Process for dehydrating 2-methylpentane-2,4-diolCELANESE CHEM EUROPE GMBH·Filed 2005·Application pending·0 cites
- 4141US2004210081A1Carboxylic esters based on 2-hydroxymethylnorbornaneFiled 2004·Application pending·0 cites
- 4241US2007179323A13(4),7(8)-Dihydroxymethylbicyclo[4,3,0]nonane and a process for its preparationCELANESE CHEM EUROPE GMBH·Filed 2007·Application pending·0 cites
- 4339US5151537AProcess for the recovery of rhodium from the residues of distillation processesHOECHST AG·Filed 1991·Granted Sep 29, 1992·3 cites·32 claims
- 4439US4673535AQuaternary ammonium salts of sulfonated triarylphosphines and process for the production thereofRUHRCHEMIE AG·Filed 1985·Granted Jun 16, 1987·1 cites·5 claims
- 4539US4404410AProcess for preparing 2,3-dimethyl-2,3-butanediolRUHRCHEMIE AG·Filed 1981·Granted Sep 13, 1983·1 cites·8 claims
- 4634US5182400AProcess for the preparation of esters of 5-alkylpyridine-2,3-dicarboxylic acidHOECHST AG·Filed 1991·Granted Jan 26, 1993·0 cites·15 claims
- 4732US4275242AProcess for preparing 2-methylenealdehydesRUHRCHEMIE AG·Filed 1979·Granted Jun 23, 1981·0 cites·3 claims
- 4829US5410072AMixtures of isomeric pentanoic acids, esters prepared therefrom, and their use as lubricantsHOECHST AG·Filed 1994·Granted Apr 25, 1995·1 cites·20 claims
- 4926US4863376AWalking beam furnaceITALIMPIANTI·Filed 1988·Granted Sep 5, 1989·2 cites·2 claims
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