US3118951A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of bis-phosphines
Assignee: American Potash and Chemical Corp
•
Filing: 1959-07-08
•
Granted: 1964-01-21
•
Expires: 1979-07-08
Abstract
No abstract record available.
Inventors
- 👤 Anton B Burg
- 👤 Louis R Grant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:26
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/50; C07F9/5027; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/26
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
42 words
A PROCESS FOR THE PREPARATION OF A BIS-PHOSPHINE COMPRISING REACTING A BIPHOSPHINE OF THE GENERAL FORMULA R''"2P-PR''"2 WHEREIN R''" IS A HYDROCARBON GROUP WITH A COMPOUND SELECTED FROM THE CLASS CONSISTING OF ALKENES AND ALKYNES IN THE PRESENCE OF AN IODINE CATALYST.
Claim 2
Dependent Claim
42 words
A PROCESS FOR THE PREPARATION OF A BIS-PHOSPHINE COMPRISING REACTING A BIPHOSPHINE OF THE GENERAL FORMULA R''"2P-PR''"2 WHEREIN R''" IS A HYDROCARBON GROUP WITH A COMPOUND SELECTED FROM THE CLASS CONSISTING OF ALKENES AND ALKYNES IN THE PRESENCE OF AN IODINE CATALYST.
Claim 3
Dependent Claim
7 words
A COMPOUND OF THE GENERAL FORMULA R2PC(R''2)C(R''2)PR2
Claim 4
Dependent Claim
7 words
A COMPOUND OF THE GENERAL FORMULA R2PC(R''2)C(R''2)PR2
References Cited (Backward Citations)
US2642461A
Cited
US2879302A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-01-20 | 1967-07-22 | 1968-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-01-20 | 1971-07-22 | 1972-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-01-20 | 1975-07-22 | 1976-01-21 | $7700.00 | Window Closed / Lapsed |