US2918468A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dialkyl pyrazinyl phosphorothioates
Assignee: Wyeth Holdings LLC
•
Filing: 1957-09-06
•
Granted: 1959-12-22
•
Expires: 1977-09-06
Abstract
No abstract record available.
Inventors
- 👤 James K Dixon
- 👤 Breuil Shirley Du
- 👤 Nancy L Boardway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:07
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/547; C07F9/645; C07F9/6509; C07F9/650952
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
A PHOSPHATE ESTER OF THE GENERAL FORMULA
Claim 2
Dependent Claim
7 words
A PHOSPHATE ESTER OF THE GENERAL FORMULA
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-21 | 1963-06-22 | 1963-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-21 | 1967-06-22 | 1967-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-21 | 1971-06-22 | 1971-12-22 | $7700.00 | Window Closed / Lapsed |