Inventor
Stephan Kretz
Inventor
Biebergemuend, DE
Overview
Patents· 13 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
C07Cprimary
C07CAcyclic or carbocyclic compounds52%
C07BGeneral methods of organic chemistry19%
B01JChemical or physical processes, e.g. catalysis or colloid chemistry10%
C01BNon-metallic elements10%
C07DHeterocyclic compounds5%
Y02PClimate change mitigation technologies in the production or processing of goods5%
PatentTitleYear
9,809,535'Process for the preparation of alkyl mercaptans'20179,206,121'Method for the production of D,L-methionine'20159,133,113'Method for the production of 2-hydroxy-4-(methylthio)butyronitrile from 3-(methylthio)propanal and hydrogen cyanide'20158,759,592'Process for preparing methylmercaptopropionaldehyde'20148,729,288'Method for the production of 2-hydroxy-4-(methylthio)butyronitrile from 3-(methylthio)propanal and hydrogen cyanide'20148,624,066'Process for preparing methylmercaptopropionaldehyde'20148,546,601'Storage-stable 2-hydroxy-4-(methylthio)butyronitrile'20138,008,530'Process for preparing methyl mercaptan'20117,833,508'Reaction vessel and process for its use'20106,605,746'Process for the preparation of 6-methylheptanone'20036,566,559'Process for the production of isopropenyl methyl ether'20036,265,617'Process for the preparation of 3,5,5-trimethylcyclohexa-3-en-1-one (.beta.-isophorone) by isomerization of 3,5,5- trimethylcyclohexa-2-en-1-one (.alpha.-isophorone)'20016,239,294'Process to produce .alpha.-tocopherol-acetate'2001Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
2001–2003Patents assigned to DEGUSSA (4)· patent assignee history
2001Based in Biebergemund, DE· patent location history
2001Based in Beibergemünd, DE· patent location history
2003Based in Biebergemnd, DE· patent location history
2010–2017Patents assigned to EVONIK DEGUSSA GMBH (9)· patent assignee history
2010–2011Based in Biebergemünd, DE· patent location history
2013–2017Patents assigned to KRETZ STEPHAN (6)· patent assignee history
2013–2015Patents assigned to KOERFER MARTIN (5)· patent assignee history
2013–2017Patents assigned to FONFE BENJAMIN (4)· patent assignee history
2013–2017Based in Biebergemuend, DE· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| EVONIK DEGUSSA GMBH | 9 | 2010–2017 |
| KRETZ STEPHANself | 6 | 2013–2017 |
| KOERFER MARTIN | 5 | 2013–2015 |
| DEGUSSA | 4 | 2001–2003 |
| FONFE BENJAMIN | 4 | 2013–2017 |
Locations
| Location | Patents | Span |
|---|---|---|
| Biebergemuend, DE | 7 | 2013–2017 |
| Biebergemünd, DE | 2 | 2010–2011 |
| Biebergemnd, DE | 2 | 2003 |
| Biebergemund, DE | 1 | 2001 |
| Beibergemünd, DE | 1 | 2001 |