US2246264A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Condensation products from polycarboxylic acids
Assignee: IG Farbenindustrie AG
•
Filing: 1937-10-19
•
Granted: 1941-06-17
•
Expires: 1957-10-19
Abstract
No abstract record available.
Inventors
- 👤 Pinkernelle Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:32
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/04; C07D295/08; C07D295/084; C07D295/088
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) | 1944-06-16 | 1944-12-16 | 1945-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-06-16 | 1948-12-16 | 1949-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-06-16 | 1952-12-16 | 1953-06-17 | $7700.00 | Window Closed / Lapsed |