Inventor · disambiguated record
Gerhard Pfahler
Also filed as: MAYER NORBERT · PFAHLER GERHARD
50 granted patents·663 citations·filing 1976–1999
98Inventor score
Top patents by PatentIndex Score
50 records- 0196US4340534AEthers based on polyalkyl-1-oxadiazaspirodecanesHOECHST AG·Filed 1980·Granted Jul 20, 1982·49 cites·13 claims
- 0292US4110334ADerivatives of 1-oxa-3,8-diaza-spiro-[4,5]-decanesHOECHST AG·Filed 1977·Granted Aug 29, 1978·24 cites·6 claims
- 0391US4433145ATriazine stabilizersHOECHST AG·Filed 1980·Granted Feb 21, 1984·25 cites·1 claims
- 0489US5331034AProcess for reducing the discoloration of a plastic molding composition at the processing temperatureHOECHST AG·Filed 1991·Granted Jul 19, 1994·68 cites·6 claims
- 0588US4335242ATriazine derivativesHOECHST AG·Filed 1980·Granted Jun 15, 1982·44 cites·2 claims
- 0686US4405735ASubstituted diazaspirodecanes, their preparation and their use as stabilizers for organic polymers, and the polymers thus stabilizedHOECHST AG·Filed 1982·Granted Sep 20, 1983·37 cites·4 claims
- 0784US5169925APolymeric polyalkyl-1-oxa-diazaspirodecanesHOECHST AG·Filed 1990·Granted Dec 8, 1992·34 cites·11 claims
- 0882US4107139A1-Oxa-4,8-diazaspiro[4,5]decanes and polymers stabilized against UV light with these compoundsHOECHST AG·Filed 1977·Granted Aug 15, 1978·11 cites·9 claims
- 0977US5856385AAdditive mixture having a nucleating action for plastics compositionsHOECHST AG·Filed 1997·Granted Jan 5, 1999·31 cites·17 claims
- 1077US4308362ACopolymers of substituted piperidines, their manufacture and useHOECHST AG·Filed 1980·Granted Dec 29, 1981·24 cites·2 claims
- 1173US5298541AAryl phosphonites, a process for their production and their use for stabilizing plasticsHOECHST AG·Filed 1990·Granted Mar 29, 1994·16 cites·17 claims
- 1271US5109043AProcess for the preparation of organophosphorus derivatives of 2,4-di-tert-butylphenol, of 4,4'-dihalomagnesium compounds of biphenyl and the use of the organophosphorus derivatives for the stabilization of polyolefin moldingHOECHST AG·Filed 1989·Granted Apr 28, 1992·10 cites·19 claims
- 1369US4207270APhosphites of polyalcoholsHOECHST AG·Filed 1978·Granted Jun 10, 1980·6 cites·1 claims
- 1469US4082723AAza-adamantane compound stabilizers for organic polymer compositionsHOECHST AG·Filed 1976·Granted Apr 4, 1978·13 cites·3 claims
- 1568US4376836ATriazylaminotriazines, their preparation and their use for stabilizing synthetic polymersHOECHST AG·Filed 1981·Granted Mar 15, 1983·16 cites·9 claims
- 1668US4239891ASubstituted piperidine hydroxamides, their preparation, and their use as light stabilizersHOECHST AG·Filed 1978·Granted Dec 16, 1980·5 cites·1 claims
- 1768US4229382AGlycerol phosphites esterified with phenolcarboxylic acidsHOECHST AG·Filed 1979·Granted Oct 21, 1980·6 cites·3 claims
- 1867US6174940B1Synergistic stabilizer mixture based on polyalkyl-1-oxa-diazaspirodecane compoundsCLARIANT GMBH·Filed 1998·Granted Jan 16, 2001·22 cites·14 claims
- 1964US6225385B1Oligomeric stabilizer mixtureCLARIANT GMBH·Filed 1999·Granted May 1, 2001·10 cites·22 claims
- 2063US4319030AAlkylated diaza-spirodecanesHOECHST AG·Filed 1980·Granted Mar 9, 1982·14 cites·1 claims
- 2162US4125501APhosphites of sugar alcohols and polymers stabilized therewithHOECHST AG·Filed 1977·Granted Nov 14, 1978·10 cites·6 claims
- 2262US4104251ASubstituted tetraalkylpiperidone-4-oximesHOECHST AG·Filed 1976·Granted Aug 1, 1978·4 cites·6 claims
- 2361US4496726APolytriazinyl alcohols, esters and urethanes, a process for their preparationWIEZER HARTMUT·Filed 1982·Granted Jan 29, 1985·7 cites·3 claims
- 2461US4125500ACyclic phosphites of sugar alcohols and polymers stabilized therewithHOECHST AG·Filed 1977·Granted Nov 14, 1978·9 cites·6 claims
- 2560US4122064ANovel organo-tin compounds and their use as stabilizersHOECHST AG·Filed 1976·Granted Oct 24, 1978·11 cites·4 claims
- 2658US5384346APolyvinyl butyrals having improved thermal stability and light resistanceHOECHST AG·Filed 1993·Granted Jan 24, 1995·30 cites·14 claims
- 2758US4162247ABis-(alkylphenyl)-alkanecarboxylic acid hydrazides, their preparation and useHOECHST AG·Filed 1978·Granted Jul 24, 1979·4 cites·6 claims
- 2856US4191684AUrea derivatives, their preparation, and their use as light stabilizersHOECHST AG·Filed 1978·Granted Mar 4, 1980·3 cites·5 claims
- 2956US4168260AN-substituted triaza-adamantanyl ureas as stabilizers for thermoplastic materialsHOECHST AG·Filed 1978·Granted Sep 18, 1979·8 cites·5 claims
- 3055US4476302AHigh-molecular esters and urethanes containing piperidine groups, a process for their preparationHOECHST AG·Filed 1982·Granted Oct 9, 1984·11 cites·4 claims
- 3154US4409348APoly-bis-triazinylaminotriazinylamines, their preparation and their use as light stabilizers for plastics, and plastics which have been stabilized with themHOECHST AG·Filed 1982·Granted Oct 11, 1983·9 cites·5 claims
- 3254US4308195AEpoxide resins containing phenol groups, their manufacture and their useHOECHST AG·Filed 1980·Granted Dec 29, 1981·9 cites·4 claims
- 3353US6420461B1Compounds based on polyalkyl-1-oxadiazaspirodecane compoundsCLARIANT GMBH·Filed 1998·Granted Jul 16, 2002·12 cites·36 claims
- 3452US5356967A6-aryl-6H-dibenzo[c,e][1,2]oxaphosphorine stabilizers for plasticsHOECHST AG·Filed 1991·Granted Oct 18, 1994·8 cites·16 claims
- 3551US5107043AProcess for the preparation a bis(3,3-bis(4-hydroxyalkylphenyl)butanoic acid)diol esterHOECHST AG·Filed 1990·Granted Apr 21, 1992·5 cites·2 claims
- 3649US4504661APolytriazinylamines, process for their preparationHOECHST AG·Filed 1981·Granted Mar 12, 1985·8 cites·6 claims
- 3748US5919933ALight stabilizers based on sterically hindered aminesCLARIANT GMBH·Filed 1997·Granted Jul 6, 1999·10 cites·10 claims
- 3845US4097452A14-Substituted 7,15-diazadispiro- 5.1.5.3!-hexadecanes as UV stabilizersHOECHST AG·Filed 1977·Granted Jun 27, 1978·4 cites·7 claims
- 3941US4093592ANovel phenolic antioxidants, their preparation and their useHOECHST AG·Filed 1977·Granted Jun 6, 1978·6 cites·5 claims
- 4040US5281640ADiarylphosphinous acid aryl esters, a process for their preparation and their use for stabilizing plasticsHOECHST AG·Filed 1992·Granted Jan 25, 1994·4 cites·8 claims
- 4138US6013706AProcess for the preparation of hyrolysis-stable trivalent phosphorus compounds and their use as stabilizers for thermoplasticsCLARIANT GMBH·Filed 1994·Granted Jan 11, 2000·3 cites·12 claims
- 4238US4471417APoly-bis-triazinylimides, their preparationHOECHST AG·Filed 1982·Granted Sep 11, 1984·4 cites·3 claims
- 4337US6491853B1Storage-stable plastics additivesCLARIANT GMBH·Filed 1996·Granted Dec 10, 2002·6 cites·13 claims
- 4436US5852159APlastic with reduced sulfur uptake rateHOECHST AG·Filed 1996·Granted Dec 22, 1998·5 cites·14 claims
- 4534US4142047ASubstituted triazaadmantane compoundsHOECHST AG·Filed 1977·Granted Feb 27, 1979·1 cites·3 claims
- 4634US4053541AAcetoacetic acid pentaerythrite phosphite esterHOECHST AG·Filed 1976·Granted Oct 11, 1977·1 cites·1 claims
- 4732US5811567AProcess for preparing the crystal modification of 2,2',2"-nitrilo triethyl tris(3,3',5,5'-tetra-tert-butyl-1,1'-biphenyl-2,2'-diyl)phosphite!Filed 1997·Granted Sep 22, 1998·0 cites·3 claims
- 4832US4234471ANovel polyalkyl-piperidine polymers, their preparation and useHOECHST AG·Filed 1979·Granted Nov 18, 1980·2 cites·4 claims
- 4930US6992124B2Polyolefin molding compound for producing calendered films/sheetsCLARIANT GMBH·Filed 1999·Granted Jan 31, 2006·2 cites·9 claims
- 5028US5382613ALight-stable polyphenylene ether molding composition with an antistatic finishHOECHST AG·Filed 1993·Granted Jan 17, 1995·2 cites·6 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →