US2223930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Amine resins
Assignee: IG Farbenindustrie AG
•
Filing: 1937-11-04
•
Granted: 1940-12-03
•
Expires: 1957-11-04
Abstract
No abstract record available.
Inventors
- 👤 Griessbach Robert
- 👤 Bitterfeld Kreis
- 👤 Meier Erhard
- 👤 Wassenegger Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:14
CPC Classifications
C; C08; C08G; C08G12/00; C08G12/46; B; B01; B01J; B01J39/00; B01J39/08; B01J39/16; B01J39/18; B01J39/19; C08G12/02; C08G12/04; C08G12/06; C08G12/08
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
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1943-12-03 | 1944-06-03 | 1944-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-12-03 | 1948-06-03 | 1948-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-12-03 | 1952-06-03 | 1952-12-03 | $7700.00 | Window Closed / Lapsed |