US3099684A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing tertiary phosphine oxides using elemental phosphorus
Assignee: Wyeth Holdings LLC
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Filing: 1961-04-07
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Granted: 1963-07-30
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Expires: 1981-04-07
Abstract
No abstract record available.
Inventors
- 👤 Michael M Rauhut
- 👤 Andrew M Semsel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:41
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/244; D06M13/282; D06M13/285; C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/50; C07F9/53; C07F9/5304
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
11 words
A METHOD OF PREPARING A TERTIARY PHOSPHINE OXIDE OF THE FORMULA
Claim 2
Independent Claim
11 words
A METHOD OF PREPARING A TERTIARY PHOSPHINE OXIDE OF THE FORMULA
Claim 3
Independent Claim
66 words
A METHOD OF PREPARING A TETIARY PHOSPHINE OXIDE WHICH COMPRISES REACTING, IN THE PRESENCE OF AN INERT SOLVENT, ELEMENTAL PHOSPHORUS A BASE AND WATER WITH A MEMBER SELECTED FROM THE GROUP CONSISTING OF TETRAFLUOROETHYLENE, CHLOROTRIFLUOROETHYLENE, AND A VINYL REACTANT IN WHICH THE VINYL MOIETY IS SUBSTITUTED WITH AN ELECTRONEGATIVE SUBSTITUENT HAVING A SIGMA (PARA) CONSTANT GREATER THAN ABOUT +0.3, AND RECOVERING THE CORRESPONDING TERTIARY PHOSPHINE OXIDE.
Claim 4
Independent Claim
66 words
A METHOD OF PREPARING A TETIARY PHOSPHINE OXIDE WHICH COMPRISES REACTING, IN THE PRESENCE OF AN INERT SOLVENT, ELEMENTAL PHOSPHORUS A BASE AND WATER WITH A MEMBER SELECTED FROM THE GROUP CONSISTING OF TETRAFLUOROETHYLENE, CHLOROTRIFLUOROETHYLENE, AND A VINYL REACTANT IN WHICH THE VINYL MOIETY IS SUBSTITUTED WITH AN ELECTRONEGATIVE SUBSTITUENT HAVING A SIGMA (PARA) CONSTANT GREATER THAN ABOUT +0.3, AND RECOVERING THE CORRESPONDING TERTIARY PHOSPHINE OXIDE.
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) | 1966-07-29 | 1967-01-28 | 1967-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-07-29 | 1971-01-28 | 1971-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-07-29 | 1975-01-28 | 1975-07-30 | $7700.00 | Window Closed / Lapsed |