US2670347A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thiophosphoric acid derivatives and method of preparing the same
Assignee: Wyeth Holdings LLC
•
Filing: 1952-01-08
•
Granted: 1954-02-23
•
Expires: 1972-01-08
Abstract
No abstract record available.
Inventors
- 👤 Kuh Erwin
- 👤 Doris R Seeger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:10
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/547; C07F9/553; C07F9/564
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
8 words
COMPOUNDS OF THE GROUP HAVING THE GENERAL FORMULA:
Claim 2
Dependent Claim
8 words
COMPOUNDS OF THE GROUP HAVING THE GENERAL FORMULA:
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) | 1957-02-22 | 1957-08-24 | 1958-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-22 | 1961-08-24 | 1962-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-22 | 1965-08-24 | 1966-02-23 | $7700.00 | Window Closed / Lapsed |