US3389137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heterocyclic phosphine imide compounds and preparation
Assignee: Wyeth Holdings LLC
•
Filing: 1965-08-03
•
Granted: 1968-06-18
•
Expires: 1985-08-03
Abstract
No abstract record available.
Inventors
- 👤 Mosby William Lindsay
- 👤 Vega Mary-Louise
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:06
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/547; C07F9/6561; C07F9/645; C07F9/6509; C07F9/6512; C07F9/6536; C07F9/6539; C07F9/6541
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FORMULA:
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE FORMULA:
Claim 3
Dependent Claim
19 words
A PROCESS FOR THE PREPARATION OF A COMPOUND OF CLAIM 1 WHICH COMPRISES REACTING A TETRAZOLE OF THE FORMULA:
References Cited (Backward Citations)
GB919868A
Cited
US3198796A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-18 | 1971-12-18 | 1972-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-18 | 1975-12-18 | 1976-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-18 | 1979-12-18 | 1980-06-18 | $7700.00 | Window Closed / Lapsed |