Inventor
Johannes E. Schmidt
Inventor
Ludwigshafen, DE
Overview
Patents· 9 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
C07Cprimary
C07CAcyclic or carbocyclic compounds75%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests17%
B01JChemical or physical processes, e.g. catalysis or colloid chemistry8%
PatentTitleYear
5,225,574'Preparation of phthalic anhydride from o-xylene'19935,206,433'Preparation of formic acid'19934,961,827'Obtaining very pure maleic anhydride from crude maleic anhydride'19904,921,977'Obtaining maleic anhydride not prone to discolor'19904,568,427'Continuous isolation of phthalic anhydride and maleic anhydride from reaction gases'19864,369,327'Preparation of phthalic anhydride'19834,218,568'Preparation of formic acid'19804,217,460'Isolation of formic acid from its aqueous solutions'19804,076,594'Purification of formic acid by extractive distillation'1978Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1978–1993Patents assigned to BASF AG (9)· patent assignee history
1978–1993Based in Ludwigshafen, DE· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| BASF AG | 9 | 1978–1993 |
Locations
| Location | Patents | Span |
|---|---|---|
| Ludwigshafen, DE | 9 | 1978–1993 |