Patent US3104264A successfully refreshed from Google Patents.
US3104264A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of diarylalkyl phosphine oxides
Assignee: United Kingdom Atomic Energy Authority
•
Filing: 1962-02-05
•
Granted: 1963-09-17
•
Expires: 1982-02-05
Abstract
No abstract record available.
Inventors
- 👤 Willans James Leonard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:05
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/50; C07F9/53
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
A METHOD OF MANUFACTURING A TERTIARY PHOSPHINE OXIDE OF THE GROUP CONSISTING OF THE DIARYLALKYL AND DIARYLARALKYL PHOSPHINE OXIDES COMPRISING THE STEPS OF ADDING A MIXTURE OF A DIARYLPHOSPHINE OXIDE AND A HALIDE OF THE GROUP CONSISTINGG OF THE ALKYL AND ARALKYL HALIDES TO A SOLUTION OF AN ALKALI METAL ALKOXIDE IN AN ALKANOL, AND ISOLATING THE SAID TERTIARY PHOSPHINE OXIDE FROM THE REACTION MIXTURE.
Claim 2
Independent Claim
65 words
A METHOD OF MANUFACTURING A TERTIARY PHOSPHINE OXIDE OF THE GROUP CONSISTING OF THE DIARYLALKYL AND DIARYLARALKYL PHOSPHINE OXIDES COMPRISING THE STEPS OF ADDING A MIXTURE OF A DIARYLPHOSPHINE OXIDE AND A HALIDE OF THE GROUP CONSISTINGG OF THE ALKYL AND ARALKYL HALIDES TO A SOLUTION OF AN ALKALI METAL ALKOXIDE IN AN ALKANOL, AND ISOLATING THE SAID TERTIARY PHOSPHINE OXIDE FROM THE REACTION MIXTURE.
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) | 1966-09-16 | 1967-03-18 | 1967-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-16 | 1971-03-18 | 1971-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-16 | 1975-03-18 | 1975-09-17 | $7700.00 | Window Closed / Lapsed |