Inventor · disambiguated record
Gerhard Fennhoff
Also filed as: FENNHOFF GERHARD
31 granted patents·440 citations·filing 1991–2000
97Inventor score
Top patents by PatentIndex Score
31 records- 0192US5410014AMethod of preparing aliphatic-aromatic polycarbonatesBAYER AG·Filed 1993·Granted Apr 25, 1995·61 cites·7 claims
- 0291US5914431ACocatalysts for the synthesis of bisphenolsBAYER AG·Filed 1997·Granted Jun 22, 1999·45 cites·24 claims
- 0391US5302774AProcess for the production of bisphenolsBAYER AG·Filed 1993·Granted Apr 12, 1994·39 cites·1 claims
- 0486US5780690ABisphenol synthesis on modified ion-exchange resins using specially purified carbonyl compoundsBAYER AG·Filed 1997·Granted Jul 14, 1998·32 cites·5 claims
- 0584US6211417B1Process for preparing bis-(4-hydroxyaryl) alkanesBAYER AG·Filed 1998·Granted Apr 3, 2001·26 cites·3 claims
- 0682US5698600AProcess for the production of bisphenols with the use of new cocatalystsBAYER AG·Filed 1996·Granted Dec 16, 1997·38 cites·3 claims
- 0778US6307111B1Method for continuous production of dihydroxydiarylalkanesBAYER AG·Filed 1998·Granted Oct 23, 2001·18 cites·1 claims
- 0876US6723881B1Method for conditioning ion exchangersBAYER AG·Filed 2000·Granted Apr 20, 2004·16 cites·8 claims
- 0976US6288284B1Method for producing bis(4-hydroxyaryl)alkanesBAYER AG·Filed 1998·Granted Sep 11, 2001·17 cites·13 claims
- 1074US6191316B1Method for processing mother liquors from the production of bisphenolBAYER AG·Filed 1998·Granted Feb 20, 2001·14 cites·1 claims
- 1170US6723885B1Bisphenol productionBAYER AG·Filed 2000·Granted Apr 20, 2004·5 cites·12 claims
- 1265US5288923APreparation of ethers of diphenolsBAYER AG·Filed 1993·Granted Feb 22, 1994·9 cites·5 claims
- 1362US5464893ARadiation-resistant polycarbonatesBAYER AG·Filed 1994·Granted Nov 7, 1995·12 cites·16 claims
- 1459US5420241AProcess for the purification of polycarbonate and polyester carbonate solutionsBAYER AG·Filed 1994·Granted May 30, 1995·9 cites·11 claims
- 1557US5382605APolycondensates which can be sterilized by γ-radiationMILES INC·Filed 1994·Granted Jan 17, 1995·10 cites·10 claims
- 1652US5151452APurification of polycarbonate and polyester carbonate wasteBAYER AG·Filed 1991·Granted Sep 29, 1992·17 cites·11 claims
- 1751US6486363B1Process for the manufacture of bis(4-hydroxyaryl)alkanesBAYER AG·Filed 1996·Granted Nov 26, 2002·5 cites·3 claims
- 1851US5214072APurification of polycarbonate, polyester carbonate or polyester wasteBAYER AG·Filed 1992·Granted May 25, 1993·19 cites·1 claims
- 1947US5357028AMethod of preparing polycarbonates and polyester carbonatesBAYER AG·Filed 1993·Granted Oct 18, 1994·6 cites·11 claims
- 2045US5393835APolycarbonate/ABS molding compoundsBAYER AG·Filed 1993·Granted Feb 28, 1995·8 cites·7 claims
- 2145US5376715AHeat stabilization or aromatic polycarbonatesBAYER AG·Filed 1994·Granted Dec 27, 1994·7 cites·1 claims
- 2244US5684062A(Co)polycarbonates stabilised against γ-radiationBAYER AG·Filed 1996·Granted Nov 4, 1997·7 cites·7 claims
- 2342US5408027AProcess for the production of aliphatic-aromatic polycarbonatesBAYER AG·Filed 1994·Granted Apr 18, 1995·4 cites·9 claims
- 2441US5612398ARadiation-resistant polycarbonatesBAYER AG·Filed 1995·Granted Mar 18, 1997·6 cites·4 claims
- 2537US5773491A(Co)polycarbonates stabilized against γ-radiationBAYER AG·Filed 1996·Granted Jun 30, 1998·4 cites·4 claims
- 2636US5399600AStabilized, flame resistant polycarbonate moulding compoundsBAYER AG·Filed 1994·Granted Mar 21, 1995·3 cites·4 claims
- 2733US6316678B1Method for producing dis(4-hydroxyaryl) alkanesBAYER AG·Filed 1999·Granted Nov 13, 2001·0 cites·6 claims
- 2831US5155205AAromatic polycarbonate containing a special fluorine-containing bisphenol componentBAYER AG·Filed 1991·Granted Oct 13, 1992·2 cites·5 claims
- 2930US6268538B1Method for producing and purifying 3-(4-Hydroxyphenyl)-1, 1,3-trimethylindan-5-olBAYER AG·Filed 1998·Granted Jul 31, 2001·1 cites·4 claims
- 3030USRE36432EProcess for the purification of polycarbonate and polyester carbonate solutionsBAYER AG·Filed 1997·Granted Dec 7, 1999·0 cites·9 claims
- 3130US5162411ACarbonates, their production and their use as flow aidsBAYER AG·Filed 1991·Granted Nov 10, 1992·0 cites·14 claims
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