Inventor · disambiguated record
Hermann Siegert
Also filed as: SIEGERT HERMANN · SIEGERT HERMANN-JOSEF
25 granted patents·7 pending applications·225 citations·filing 1982–2015
95Inventor score
Top patents by PatentIndex Score
32 records- 0192US6979432B2Hydrogen cyanide synthesis processROEHM GMBH·Filed 2003·Granted Dec 27, 2005·35 cites·7 claims
- 0291US6977310B2Method for the continuous production of alkyl (meth)acrylatesROEHM GMBH·Filed 2002·Granted Dec 20, 2005·57 cites·18 claims
- 0391US6743407B2Hydrogen cyanide synthesis processROEHM GMBH·Filed 2001·Granted Jun 1, 2004·34 cites·7 claims
- 0490US7999130B2Methods for producing alkyl(meth)acrylatesEVONIK ROEHM GMBH·Filed 2006·Granted Aug 16, 2011·14 cites·22 claims
- 0586US4452999AMethod for making isobutyric acidROEHM GMBH·Filed 1982·Granted Jun 5, 1984·19 cites·9 claims
- 0685US7714165B2Method for the continuous production of unsaturated carboxylic acid anhydridesEVONIK ROEHM GMBH·Filed 2007·Granted May 11, 2010·7 cites·18 claims
- 0781US8791296B2Process for preparing methacrylic acidBROELL DIRK·Filed 2012·Granted Jul 29, 2014·3 cites·16 claims
- 0879US8084640B2Method for the continuous production of unsaturated carboxylic acid anhydridesBROELL DIRK·Filed 2007·Granted Dec 27, 2011·6 cites·10 claims
- 0978US7928251B2Process for preparing tetramethyl glycolideEVONIK ROEHM GMBH·Filed 2007·Granted Apr 19, 2011·2 cites·24 claims
- 1077US8337671B2Method for purifying polymerizable compoundsBROELL DIRK·Filed 2007·Granted Dec 25, 2012·3 cites·17 claims
- 1176US4992582AMethod for making isobutyric acidROEHM GMBH·Filed 1988·Granted Feb 12, 1991·14 cites·2 claims
- 1272US8975440B2Method for producing a carboxylic acid amide from a carbonyl compound and hydrocyanic acidMAY ALEXANDER·Filed 2009·Granted Mar 10, 2015·2 cites·17 claims
- 1372US8207371B2Process for preparing (meth)acrylic acidVOGEL BERND·Filed 2007·Granted Jun 26, 2012·2 cites·12 claims
- 1471US8569539B2Process for preparing alpha-hydroxycarboxylic estersMAY ALEXANDER·Filed 2007·Granted Oct 29, 2013·2 cites·37 claims
- 1567US8334406B2Process for preparing carboxamides by hydrolysis carboxylic acid nitriles in the presence of a catalyst comprising manganese dioxideMAY ALEXANDER·Filed 2007·Granted Dec 18, 2012·1 cites·27 claims
- 1659US5380932AProcess for producing methacrylic acid and methacrolein by oxidation of isobutane with molybdenum heteropoly acid catalystROEHM GMBH·Filed 1993·Granted Jan 10, 1995·7 cites·5 claims
- 1758US4504675AMethod for making isobutyric acid or esters thereofROEHM GMBH·Filed 1982·Granted Mar 12, 1985·5 cites·10 claims
- 1855US8889899B2Transesterification methodsACKERMANN JOCHEN·Filed 2006·Granted Nov 18, 2014·1 cites·12 claims
- 1955US2010068773A1Microbiological production of 3-hydroxyisobutyric acidEVONIK ROEHM GMBH·Filed 2007·Application pending·0 cites
- 2052US9289752B2Catalyst for reacting carboxylic acid nitrilesMAY ALEXANDER·Filed 2009·Granted Mar 22, 2016·0 cites·24 claims
- 2151US2011020207A1Method for producing hydrogen cyanide in a particulate heat exchanger circulated as a moving fluidized bedEVONIK ROEHM GMBH·Filed 2009·Application pending·0 cites
- 2251US2010086468A1Method for producing hydrocyanic acid (hcn)EVONIK ROEHM GMBH·Filed 2008·Application pending·0 cites
- 2349US8461375B2Method for the continuous production of alkyl(meth)acrylates with multiple catalyst recyclingACKERMANN JOCHEN·Filed 2003·Granted Jun 11, 2013·2 cites·20 claims
- 2447US4647696AMethod for making isobutyric acidROEHM GMBH·Filed 1983·Granted Mar 3, 1987·2 cites·2 claims
- 2547US2010021977A1Process for preparing alkyl (meth)acrylates using an enzymatic cyanohydrin hydrolysisEVONIK ROEHM GMBH·Filed 2007·Application pending·0 cites
- 2645US9234218B2Process for preparing methacrylic acid or methacrylic estersMARX ACHIM·Filed 2008·Granted Jan 12, 2016·0 cites·6 claims
- 2745US2008269431A1Apparatus and Method for Continuously Carried Out Equilibrium ReactionsEVONIK ROEHM GMBH·Filed 2006·Application pending·0 cites
- 2845US2015218601A1Microbiological production of 3-hydroxyisobutyric acidMARX ACHIM·Filed 2015·Application pending·0 cites
- 2944US2009209781A1Process for preparing alpha-hydroxycarboxylic acidsEVONIK ROEHM GMBH·Filed 2007·Application pending·0 cites
- 3036US4791227AMethod for handling reaction mixtures containing hydrogen fluorideROEHM GMBH·Filed 1982·Granted Dec 13, 1988·5 cites·7 claims
- 3135US4673730AMethod for recovering aromatic polyethersROEHM GMBH·Filed 1986·Granted Jun 16, 1987·2 cites·6 claims
- 3229US5218145AMethod for making isobutyric acidROEHM GMBH·Filed 1988·Granted Jun 8, 1993·0 cites·7 claims
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