US3291840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tertiary phosphine oxides
Assignee: Wyeth Holdings LLC
•
Filing: 1962-03-01
•
Granted: 1966-12-13
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Expires: 1982-03-01
Abstract
No abstract record available.
Inventors
- 👤 Sheldon A Buckler
- 👤 Epstein Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:23
CPC Classifications
C; C22; C22B; C22B60/00; C22B60/02; C22B60/0204; C22B60/0217; C22B60/0252; C22B60/026; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/50; C07F9/53; C07F9/5304; C22B3/00; C22B3/20; C22B3/26; C22B3/38; C22B3/387; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
2 words
(1-HYDROXYCYCLOHEXYL)CYCLOHEXYLPHENYLPHOSPHINE OXIDE.
Claim 2
Dependent Claim
2 words
(1-HYDROXYCYCLOHEXYL)CYCLOHEXYLPHENYLPHOSPHINE OXIDE.
References Cited (Backward Citations)
US2957931A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-12 | 1970-06-13 | 1970-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-12 | 1974-06-13 | 1974-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-12 | 1978-06-13 | 1978-12-13 | $7700.00 | Window Closed / Lapsed |