US2268158A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Esters of gamma oxophosphonic acids
Assignee: Individual
•
Filing: 1939-05-05
•
Granted: 1941-12-30
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Expires: 1959-05-05
Abstract
No abstract record available.
Inventors
- 👤 Carl S Marvel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:27
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/30; C07F9/301; C07F9/38; C07F9/40; C07F9/4003; C07F9/4006; C07F9/42; C07F9/425; C07F9/547; C07F9/6564; C07F9/6571; C07F9/657163; C07F9/657181; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/26; C10L1/2608; C10M2223/00; C10M2223/06; C10M2223/065
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) | 1944-12-29 | 1945-06-30 | 1945-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-12-29 | 1949-06-30 | 1949-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-12-29 | 1953-06-30 | 1953-12-30 | $7700.00 | Window Closed / Lapsed |