US2211001A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxalkyl derivatives of imidazolines
Assignee: GAF Chemicals Corp
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Filing: 1938-03-10
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Granted: 1940-08-13
•
Expires: 1958-03-10
Abstract
No abstract record available.
Inventors
- 👤 Chwala August
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:35
CPC Classifications
C; C07; C07D; C07D233/00; C07D233/04; C07D233/06; C07D233/08; C07D233/12; C07D233/16; C07D233/14; C07D233/20; C07D233/22
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) | 1943-08-13 | 1944-02-12 | 1944-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-08-13 | 1948-02-12 | 1948-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-08-13 | 1952-02-12 | 1952-08-13 | $7700.00 | Window Closed / Lapsed |