US2879301A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the preparation of phosphine borines
Assignee: American Potash and Chemical Corp
•
Filing: 1956-02-21
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Granted: 1959-03-24
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Expires: 1976-02-21
Abstract
No abstract record available.
Inventors
- 👤 Robert D Stewart
- 👤 David R Stern
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:32
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/50; C07F9/5045
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
A PROCESS FOR THE PREPARATION OF A LOWER ALKYLSUBSTITUTED PHOSPHINE BORINE CONSISTING OF REDUCING A LOWER ALKYL-SUBSTITUTED PHOSPHINE TRIHALOBORINE WITH A HYDRIDE SELECTED FROM THE GROUP CONSISTING OF AN ALKALI METAL HYDRIDE, AN ALKALINE EARTH METAL HYDRIDE, LITHIUM ALUMINUM HYDRIDE AND SODIUM BOROHYDRIDE IN AN INERT SOLVENT FOR EACH OF SAID REACTANTS AND IN THE ABSENCE OF WATER.
Claim 2
Dependent Claim
58 words
A PROCESS FOR THE PREPARATION OF A LOWER ALKYLSUBSTITUTED PHOSPHINE BORINE CONSISTING OF REDUCING A LOWER ALKYL-SUBSTITUTED PHOSPHINE TRIHALOBORINE WITH A HYDRIDE SELECTED FROM THE GROUP CONSISTING OF AN ALKALI METAL HYDRIDE, AN ALKALINE EARTH METAL HYDRIDE, LITHIUM ALUMINUM HYDRIDE AND SODIUM BOROHYDRIDE IN AN INERT SOLVENT FOR EACH OF SAID REACTANTS AND IN THE ABSENCE OF WATER.
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) | 1962-03-23 | 1962-09-22 | 1963-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-23 | 1966-09-22 | 1967-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-23 | 1970-09-22 | 1971-03-24 | $7700.00 | Window Closed / Lapsed |