Inventor · disambiguated record
Frieder Heydenreich
Also filed as: HEYDENREICH FRIEDER
22 granted patents·1 pending application·225 citations·filing 1979–2002
95Inventor score
Files withBAYER AG22
Top patents by PatentIndex Score
23 records- 0187US6710211B1Method for the production of bisphenol-aBAYER AG·Filed 2000·Granted Mar 23, 2004·17 cites·3 claims
- 0285US6906227B2Bisphenol phenol adductsBAYER AG·Filed 2000·Granted Jun 14, 2005·16 cites·5 claims
- 0384US6211417B1Process for preparing bis-(4-hydroxyaryl) alkanesBAYER AG·Filed 1998·Granted Apr 3, 2001·26 cites·3 claims
- 0480US4369293ACatalyst for the preparation of bisphenolsBAYER AG·Filed 1981·Granted Jan 18, 1983·37 cites·1 claims
- 0576US6723881B1Method for conditioning ion exchangersBAYER AG·Filed 2000·Granted Apr 20, 2004·16 cites·8 claims
- 0676US6689464B1Method and device for producing bisphenol a prills and bisphenol a prills produced according to this methodBAYER AG·Filed 2000·Granted Feb 10, 2004·8 cites·26 claims
- 0773US6828465B2Method for producing bisphenolsBAYER AG·Filed 2001·Granted Dec 7, 2004·6 cites·9 claims
- 0873US4362846APolyamide moulding compounds having high impact strengthBAYER AG·Filed 1981·Granted Dec 7, 1982·24 cites·10 claims
- 0972US6726354B1Device for mixing and reacting multiphase gaseous and liquid mixtures and use of this deviceBAYER AG·Filed 2000·Granted Apr 27, 2004·20 cites·18 claims
- 1070US6723885B1Bisphenol productionBAYER AG·Filed 2000·Granted Apr 20, 2004·5 cites·12 claims
- 1170US6682794B1Polycarbonate containersBAYER AG·Filed 2000·Granted Jan 27, 2004·8 cites·10 claims
- 1264US6384288B1Method for the production of bis(4-hydroxyaryl)alkanesBAYER AG·Filed 1999·Granted May 7, 2002·7 cites·10 claims
- 1363US6414198B1Method for producing bisphenol-ABAYER AG·Filed 1999·Granted Jul 2, 2002·8 cites·8 claims
- 1462US6590128B1Initiation method of a method for producing 2,2-bis(4-hydroxyphenyl)propaneBAYER AG·Filed 2000·Granted Jul 8, 2003·6 cites·4 claims
- 1561US6417318B1Process for the removal of dissolved oxygen from phenolBAYER AG·Filed 2001·Granted Jul 9, 2002·2 cites·12 claims
- 1660US6919487B2Bis(4-hydroxyaryl)alkanesBAYER AG·Filed 2000·Granted Jul 19, 2005·2 cites·7 claims
- 1758US6683223B2Fluidised bisphenol dustBAYER AG·Filed 2000·Granted Jan 27, 2004·2 cites·6 claims
- 1853US6695991B1Device for exchanging a die plate of a prilling tower and method for the automatic exchangeBAYER AG·Filed 2000·Granted Feb 24, 2004·1 cites·12 claims
- 1949US6395864B1Polycarbonates with a low yellowness indexBAYER AG·Filed 1999·Granted May 28, 2002·9 cites·12 claims
- 2040US4293662APolyamides containing oxidized polyethyleneBAYER AG·Filed 1979·Granted Oct 6, 1981·5 cites·6 claims
- 2139US2002055661A1Method for the production of bis(4-hydroxyaryl)-alkanesFiled 2002·Application pending·0 cites
- 2238US6774268B2Substance mixture containing bisphenol ABAYER AG·Filed 2001·Granted Aug 10, 2004·0 cites·5 claims
- 2333US6316678B1Method for producing dis(4-hydroxyaryl) alkanesBAYER AG·Filed 1999·Granted Nov 13, 2001·0 cites·6 claims
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