Inventor · disambiguated record
Willi Hofen
Also filed as: HOFEN WILLI
43 granted patents·1 pending application·523 citations·filing 1976–2021
98Inventor score
Top patents by PatentIndex Score
44 records- 0194US6297408B1Two-stage process for the production of 1,3-propanediol by catalytic hydrogenation of 3-hydroxypropanalDU PONT·Filed 1999·Granted Oct 2, 2001·77 cites·10 claims
- 0293US6342646B1Catalytic hydrogenation of 3-hydroxypropanal to 1,3-propanediolDU PONT·Filed 1999·Granted Jan 29, 2002·60 cites·16 claims
- 0392US7157610B2Process for recovering methanolUHDE GMBH·Filed 2005·Granted Jan 2, 2007·18 cites·9 claims
- 0490US4369096AProcess for the purification of epoxidesBAYER AG·Filed 1980·Granted Jan 18, 1983·23 cites·20 claims
- 0589US5866721AProcess for separating the product gas mixture from the catalytic synthesis of methyl mercaptanDEGUSSA·Filed 1997·Granted Feb 2, 1999·47 cites·10 claims
- 0687US10214504B2Process and reactor for the epoxidation of propeneEVONIK DEGUSSA GMBH·Filed 2016·Granted Feb 26, 2019·6 cites·20 claims
- 0785US7091384B2Process for increasing the selectivity of the hydrogenation of 4,4′-diaminodiphenylmethane to 4,4′-diaminodicyclohexylmethane in the presence of an N-alkyl-4,4′-diaminodiphenylmethaneDEGUSSA·Filed 2003·Granted Aug 15, 2006·18 cites·10 claims
- 0884US7049450B2Process for the purification of crude propene oxideUHDE GMBH·Filed 2003·Granted May 23, 2006·15 cites·20 claims
- 0984US6878836B2Process for the epoxidation of propeneDEGUSSA·Filed 2004·Granted Apr 12, 2005·16 cites·22 claims
- 1083US4341709APreparation of ε-caprolactoneBAYER AG·Filed 1980·Granted Jul 27, 1982·15 cites·20 claims
- 1182US6284930B1Process for the preparation of 3-hydroxypropanalDU PONT·Filed 1999·Granted Sep 4, 2001·30 cites·26 claims
- 1279US6596881B2Process for the epoxidation of olefinsDEGUSSA·Filed 2002·Granted Jul 22, 2003·9 cites·25 claims
- 1379US6011179AProcess for the production of amines from imines of nitrilesDEGUSSA·Filed 1998·Granted Jan 4, 2000·23 cites·7 claims
- 1477US6596883B2Process for the epoxidation of olefinsDEGUSSA·Filed 2002·Granted Jul 22, 2003·8 cites·32 claims
- 1576US10428036B2Process for the epoxidation of propeneEVONIK DEGUSSA GMBH·Filed 2016·Granted Oct 1, 2019·2 cites·16 claims
- 1674US5886230AProcess for continuous production of methyl mercaptanDEGUSSA·Filed 1997·Granted Mar 23, 1999·16 cites·6 claims
- 1773US4088676AProcess for the preparation of organic solutions of percarboxylic acidsBAYER AG·Filed 1976·Granted May 9, 1978·10 cites·20 claims
- 1872US10870631B2Process for the epoxidation of propeneEVONIK OPERATIONS GMBH·Filed 2018·Granted Dec 22, 2020·1 cites·20 claims
- 1972US7169945B2Process for the epoxidation of olefinsUHDE GMBH·Filed 2003·Granted Jan 30, 2007·11 cites·52 claims
- 2072US7141683B2Process for the epoxidation of olefinsUHDE GMBH·Filed 2003·Granted Nov 28, 2006·7 cites·31 claims
- 2171US5852219ACatalyst, process for its preparation, and use for synthesis of methyl mercaptanDEGUSSA·Filed 1997·Granted Dec 22, 1998·33 cites·12 claims
- 2270US6624319B2Process for the epoxidation of olefinsDEGUSSA·Filed 2001·Granted Sep 23, 2003·4 cites·10 claims
- 2369US5892129AProcess for the preparation of 1,1,3-trialkoxypropaneDEGUSSA·Filed 1997·Granted Apr 6, 1999·15 cites·20 claims
- 2468US6617465B2Process for the epoxidation of olefinsDEGUSSA·Filed 2002·Granted Sep 9, 2003·7 cites·24 claims
- 2568US6600055B2Process for the epoxidation of olefinsDEGUSSA·Filed 2002·Granted Jul 29, 2003·3 cites·26 claims
- 2666US6646141B2Process for the epoxidation of olefinsDEGUSSA·Filed 2001·Granted Nov 11, 2003·3 cites·12 claims
- 2765US4070253AProcess for separating solutions containing propylene oxideBAYER AG·Filed 1976·Granted Jan 24, 1978·5 cites·20 claims
- 2864US6610865B2Process for the epoxidation of olefinsDEGUSSA·Filed 2001·Granted Aug 26, 2003·2 cites·30 claims
- 2963US4849532AProcess for the preparation of a cycloaliphatic diepoxideDEGUSSA·Filed 1988·Granted Jul 18, 1989·7 cites·6 claims
- 3060US5852217AProcess for the production of primary and/or secondary amines from oxo compoundsDEGUSSA·Filed 1997·Granted Dec 22, 1998·7 cites·14 claims
- 3160US4855465AProcess for the treatment of aliphatic epoxidesDEGUSSA·Filed 1988·Granted Aug 8, 1989·6 cites·11 claims
- 3259US4344897AProcess for the preparation of percarboxylic acid solutionsBAYER AG·Filed 1979·Granted Aug 17, 1982·5 cites·15 claims
- 3358US6608219B2Process for the epoxidation of olefinsDEGUSSA·Filed 2002·Granted Aug 19, 2003·1 cites·21 claims
- 3457US11697631B2Process and facility for recovering methoxypropanols from an aqueous streamEVONIK OPERATIONS GMBH·Filed 2021·Granted Jul 11, 2023·0 cites·14 claims
- 3552US4904821AMethod of preparing peracetic acidDEGUSSA·Filed 1988·Granted Feb 27, 1990·5 cites·9 claims
- 3652US4874556AProcess for the desensitization of water-insoluble peroxycarboxylic acidsDEGUSSA·Filed 1988·Granted Oct 17, 1989·4 cites·12 claims
- 3751US6838572B2Process for the epoxidation of olefinsDEGUSSA·Filed 2003·Granted Jan 4, 2005·1 cites·38 claims
- 3848US6749668B2Process for the recovery of combustible components of a gas streamDEGUSSA·Filed 2002·Granted Jun 15, 2004·1 cites·33 claims
- 3945US6670492B2Process for the expoxidation of olefinsDEGUSSA·Filed 2001·Granted Dec 30, 2003·0 cites·9 claims
- 4043US8481765B2Method for the production of epichlorohydrinHOFEN WILLI·Filed 2008·Granted Jul 9, 2013·0 cites·9 claims
- 4141US6720436B2Process for the epoxidation of olefinsDEGUSSA·Filed 2003·Granted Apr 13, 2004·0 cites·26 claims
- 4239US4921983AMethod for the continuous epoxidation of olefinsDEGUSSA·Filed 1989·Granted May 1, 1990·1 cites·7 claims
- 4337US4089892AProcess for the preparation of percarboxylic acid solutionsDEGUSSA·Filed 1976·Granted May 16, 1978·1 cites·17 claims
- 4431US2004000473A1Process of separating 1-methoxy-2-propanol and 2-methoxy-1-propanol from aqueous compositionsFiled 2003·Application pending·0 cites
Join the waitlist — get patent alerts
Get an alert when Willi Hofen files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →