US3780112A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Substituted ethylene bis(phosphine oxides)
Assignee: Union Carbide Corp
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Filing: 1972-08-09
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Granted: 1973-12-18
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Expires: 1992-08-09
Abstract
Abstract A PROCESS FOR THE PRODUCTION OF SUBSTITUTED ETHYLENE BIS(PHOSPHINE OXIDES) WHICH COMPRISES CONTACTING A SUBSTITUTED PHOSPHINE HALIDE WITH DIETHYLENE GLYCOL AT A TEMPERATURE OF -25*C. TO 100*C. IN THE PRESENCE OF AN ACID ACCEPTOR TO PRODUCE THE CORRESPONDING PHOSPHINOUS TEMPERATURES OF 100* TO 400*C.
Inventors
- 👤 K Weinberg
- 👤 J Mckeon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:15
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/50; C07F9/53; C07F9/5329; C07F9/46
Claims Analysis
Total Claims: 0
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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) | 1976-12-17 | 1977-06-18 | 1977-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-17 | 1981-06-18 | 1981-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-17 | 1985-06-18 | 1985-12-18 | $7700.00 | Window Closed / Lapsed |