US2930814A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phosphonium cyclopentadienylides
Assignee: Wyeth Holdings LLC
•
Filing: 1958-04-25
•
Granted: 1960-03-29
•
Expires: 1978-04-25
Abstract
No abstract record available.
Inventors
- 👤 Ramirez Fausto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:38
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/535; C07F9/5352; C09; C09B; C09B33/00; C09B33/02; C09B33/16; C09B35/00; C09B35/02; C09B35/039; C09B35/205; C09B35/215
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
4 words
COMPOUNDS OF THE FORMULA:
Claim 2
Dependent Claim
4 words
COMPOUNDS OF THE 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) | 1963-03-29 | 1963-09-28 | 1964-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-29 | 1967-09-28 | 1968-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-29 | 1971-09-28 | 1972-03-29 | $7700.00 | Window Closed / Lapsed |