Patent US2927945A successfully refreshed from Google Patents.
US2927945A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tertiary phosphine oxides
Assignee: Wyeth Holdings LLC
•
Filing: 1959-07-02
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Granted: 1960-03-08
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Expires: 1979-07-02
Abstract
No abstract record available.
Inventors
- 👤 Sheldon A Buckler
- 👤 Nancy E Day
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:52
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/50; C07F9/53; C07F9/5333; C07F9/5304
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
TERTIARY PHOSPHINE OXIDES OF THE GENERAL FORMULA
Claim 2
Dependent Claim
7 words
TERTIARY PHOSPHINE OXIDES OF 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) | 1963-03-08 | 1963-09-07 | 1964-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-08 | 1967-09-07 | 1968-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-08 | 1971-09-07 | 1972-03-08 | $7700.00 | Window Closed / Lapsed |