Inventor

Hans-Juergen Weyer

Inventor

Mannheim, DE

Overview

1991–1998

Patent span

Chemistry

Primary field (CPC C)

Patents· 16 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

C07Dprimary

C07DHeterocyclic compounds40%

C08GMacromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds40%

C07CAcyclic or carbocyclic compounds20%

PatentTitleYear

5,714,638'Preparation of polyoxyalkylene glycol monoether of tert-butyl alcohol and product'1998 5,659,068'Preparation of polyoxyalkylene glycol monoesters of monocarboxylic acids'1997 5,561,217'Preparation of polyether glycols'1996 5,536,854'Preparation of 2-methyl-1,4-butanediol and 3-methyltetrahydrofuran'1996 5,434,273'Preparation of N-substituted 2-pyrrolidones'1995 5,416,240'Preparation of poloxy-alkylene glycols'1995 5,414,143'Preparation of polyoxyalkylene glycol monoethers of monohydric alcohols'1995 5,395,959'Adjustment of the average molecular weight of polyoxyalkylene glycols and polyoxyalkylene derivatives in the heteropolyacid-catalyzed polymerization of cyclic ethers and/or acetals with ring cleavage'1995 5,391,771'Hydrogenation of citric acid'1995 5,387,701'Preparation of 4-hydroxymethyltetrahydropyran'1995 5,371,242'Preparation of products of the reduction of 4-hydroxybutyric acid derivatives'1994 5,276,165'Preparation of N-substituted lactams'1994 5,157,127'Preparation of N-substituted pyrrolidones'1992 5,099,074'Process for the preparation of polyether glycols'1992 5,097,077'Purification of heteropolyacid-containing polyalkylene ether glycols'1992 5,008,408'Preparation of 1,4-butanediol and tetrahydrofuran'1991

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1991–1998Patents assigned to BASF AG (15)· patent assignee history

1991Based in Ludwigshafen, DE· patent location history

1992Patents assigned to FISCHER ROLF (1)· patent assignee history

1992Patents assigned to HARDER WOLFGANG (1)· patent assignee history

1992Patents assigned to WEYER HANS JUERGEN (1)· patent assignee history

1992–1998Based in Mannheim, DE· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
BASF AG	15	1991–1998
FISCHER ROLF	1	1992
HARDER WOLFGANG	1	1992
WEYER HANS JUERGENself	1	1992

Locations

Location	Patents	Span
Mannheim, DE	15	1992–1998
Ludwigshafen, DE	1	1991