US3145234A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organic phosphine derivatives and methods of preparating same
Assignee: Wyeth Holdings LLC
•
Filing: 1959-07-01
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Granted: 1964-08-18
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Expires: 1979-07-01
Abstract
No abstract record available.
Inventors
- 👤 Sheldon A Buckler
- 👤 Epstein Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:53
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/50; C07F9/53; C22; C22B; C22B3/00; C22B3/20; C22B3/26; C22B3/38; C22B3/382; C22B3/387; C22B60/00; C22B60/02; C22B60/0204; C22B60/0217; C22B60/0252; C22B60/026; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
2 words
2-CYANOETHYLPHOSPHINE OXIDE.
Claim 2
Dependent Claim
2 words
2-CYANOETHYLPHOSPHINE OXIDE.
Claim 3
Independent Claim
12 words
A METHOD OF PREPARING AN ORGANOPHOSPHORUS PRIMARY OXIDE CORRESPONDING TO THE FORMULA
Claim 4
Independent Claim
12 words
A METHOD OF PREPARING AN ORGANOPHOSPHORUS PRIMARY OXIDE CORRESPONDING TO THE 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) | 1967-08-18 | 1968-02-17 | 1968-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-18 | 1972-02-17 | 1972-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-18 | 1976-02-17 | 1976-08-18 | $7700.00 | Window Closed / Lapsed |