Patent US4687301A successfully refreshed from Google Patents.
Patent US2083482A successfully refreshed from Google Patents.
US2083482A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbocyclic compounds containing acid salt-forming groups
Assignee: IG Farbenindustrie AG
•
Filing: 1935-11-20
•
Granted: 1937-06-08
•
Expires: 1955-11-20
Abstract
No abstract record available.
Inventors
- 👤 Steindorff Adolf
- 👤 Heimke Paul
- 👤 Horst Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:51
CPC Classifications
C; C07; C07C; C07C59/00; C07C59/125; C07C59/13; C07C59/40; C07C59/58; C07C59/64; C07C59/66; C07C59/68
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
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1940-06-07 | 1940-12-07 | 1941-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-06-07 | 1944-12-07 | 1945-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-06-07 | 1948-12-07 | 1949-06-08 | $7700.00 | Window Closed / Lapsed |