Patent DE696779C successfully refreshed from Google Patents.
DE696779C
Expired / Lapsed
DE
⏱️ 0.0 years remaining
Process for the production of tetrahydrofurans
Assignee: IG Farbenindustrie AG
•
Filing: 1937-10-30
•
Granted: 1940-09-28
•
Expires: 1957-10-30
Abstract
No abstract record available.
Inventors
- 👤 Dr Otto Hecht
- 👤 Dr Walter Reppe
- 👤 Dr Adolf Steinhofer
Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-10-31 11:45
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/02; C07D307/04; C07D307/06; C07D307/08
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.