US1977178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of 1,3,5-trimethyl benzene
Assignee: IG Farbenindustrie AG
•
Filing: 1933-02-21
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Granted: 1934-10-16
•
Expires: 1953-02-21
Abstract
No abstract record available.
Inventors
- 👤 Dohse Hans
- 👤 Schuster Curt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:31
CPC Classifications
C; C07; C07C; C07C1/00; C07C1/20; C07C1/207; C07C1/2072; C07C1/2074; C07C2521/00; C07C2521/02; C07C2521/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1937-10-15 | 1938-04-16 | 1938-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-10-15 | 1942-04-16 | 1942-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-10-15 | 1946-04-16 | 1946-10-16 | $7700.00 | Window Closed / Lapsed |