US2606901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organic phosphoric acid derivatives and methods of preparing the same
Assignee: Wyeth Holdings LLC
•
Filing: 1951-07-25
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Granted: 1952-08-12
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Expires: 1971-07-25
Abstract
No abstract record available.
Inventors
- 👤 Robert P Parker
- 👤 Doris R Seeger
- 👤 Kuh Erwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:24
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)
US2160841A
Cited
US2372244A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-08-12 | 1956-02-11 | 1956-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-12 | 1960-02-11 | 1960-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-12 | 1964-02-11 | 1964-08-12 | $7700.00 | Window Closed / Lapsed |