Inventor
Gunther Cramm
Inventor
Leverkusen, DE
Overview
Patents· 14 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
C07Dprimary
C07DHeterocyclic compounds42%
D21HPulp compositions26%
C08GMacromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds21%
C07CAcyclic or carbocyclic compounds5%
D21FPaper-making machines5%
PatentTitleYear
6,822,095'Method for producing 4,6-dichloropyrimidine'20046,562,970'Method for producing 4-chloro-6-hydroxypyrimidine'20036,525,198'Method for producing 4,6-dichloropyrimidine with sulfur compounds and phosphorus compounds'20036,441,170'Method of producing 4,6-dichloropyrimidine with acid chlorides'20026,441,171'Method for the production of 4,6-dichloropyrimidine with the aid of phosgene'20025,677,453'Process for the preparation of 4,6-dichloropyrimidines'19975,283,338'Process for the preparation of 2-chloropyridines'19944,673,729'Paper auxiliary from condensation product of aliphatic polyol-ether-amine and compound polyfunctional toward amino groups'19874,384,110'Polyamines containing urea groups prepared from lactam or aminocarboxylic acid'19834,348,514'Polyamines containing urea groups'19824,294,985'Production of thiocarbohydrazide on a commercial scale'19814,250,299'Polyamines containing amide groups'19814,250,298'Polyamines containing amide groups'19814,132,736'Preparation of 4-alkylthiosemicarbazides'1979Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1979–2004Patents assigned to BAYER AG (13)· patent assignee history
1979–1983Based in Cologne, DE· patent location history
1987–2004Based in Leverkusen, DE· patent location history
2002Patents assigned to BAYER AKITNEGESELLSCHAFT (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| BAYER AG | 13 | 1979–2004 |
| BAYER AKITNEGESELLSCHAFT | 1 | 2002 |
Locations
| Location | Patents | Span |
|---|---|---|
| Leverkusen, DE | 8 | 1987–2004 |
| Cologne, DE | 6 | 1979–1983 |