US3210418A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of aliphatic dihalophosphines
Assignee: FMC Corp
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Filing: 1953-10-19
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Granted: 1965-10-05
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Expires: 1973-10-19
Abstract
No abstract record available.
Inventors
- 👤 John A Pianfetti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:46
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/50; C07F9/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
THE METHOD FOR THE PREPARATION OF AN ALIPHATIC SUBSTITUTED DIHALOPHOSPHINE BY A SUBSTITUTION REACTION, WITH HYDROGEN HALIDE AS A CO-PRODUCT, COMPRISING PREPARING A GASEOUS MIXTURE JOF A PHOSPHORUS TRIHALIDE AND A LOWER ALIPHATIC HYDROCARBON, PASSING THE MIXTURE RAPIDLY THROUGH A REACTION ZONE IN WHICH THE TEMPERATURE IS MAINTAINED BETWEEN ABOUT 300 AND 900*C., AND RECOVERING THE SUBSTITUTED DIHALOPHOSPHINE FROM THE REACTION PRODUCT.
Claim 2
Independent Claim
62 words
THE METHOD FOR THE PREPARATION OF AN ALIPHATIC SUBSTITUTED DIHALOPHOSPHINE BY A SUBSTITUTION REACTION, WITH HYDROGEN HALIDE AS A CO-PRODUCT, COMPRISING PREPARING A GASEOUS MIXTURE JOF A PHOSPHORUS TRIHALIDE AND A LOWER ALIPHATIC HYDROCARBON, PASSING THE MIXTURE RAPIDLY THROUGH A REACTION ZONE IN WHICH THE TEMPERATURE IS MAINTAINED BETWEEN ABOUT 300 AND 900*C., AND RECOVERING THE SUBSTITUTED DIHALOPHOSPHINE FROM THE REACTION PRODUCT.
References Cited (Backward Citations)
US2685602A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-04 | 1969-04-05 | 1969-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-04 | 1973-04-05 | 1973-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-04 | 1977-04-05 | 1977-10-05 | $7700.00 | Window Closed / Lapsed |