US4379768A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing perfluorosuccinyl fluoride
Assignee: AGC Inc
•
Filing: 1981-08-26
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Granted: 1983-04-12
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Expires: 2001-08-26
Abstract
Abstract Perfluorosuccinyl fluoride is produced by coupling accompanied by dehalogenation of a difluorohaloacetyl fluoride having the formula XCF.sub.2 COF wherein X represents I, Br or Cl by reacting with a trapping agent of a halogen at a temperature ranging from 100° to 500° C.
Inventors
- 👤 Masaaki Yamabe
- 👤 Seiji Munekata
- 👤 Seisaku Kumai
- 👤 Isamu Kaneko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:57
CPC Classifications
C; C07; C07C; C07C59/00; C07C59/40; C07C59/76; C07C59/88; C07C51/00; C07C51/58; C07C51/62
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
46 words
A process for producing perfluorosuccinyl fluoride which comprises coupling accompanied by dehalogenation of a difluorohaloacetyl fluoride having the formula XCF.sub.2 COF wherein X represents I, Br or Cl by reacting with a trapping agent of a halogen at a temperature ranging from 100° to 500° C.
Claim 2
Dependent Claim
46 words
A process for producing perfluorosuccinyl fluoride which comprises coupling accompanied by dehalogenation of a difluorohaloacetyl fluoride having the formula XCF.sub.2 COF wherein X represents I, Br or Cl by reacting with a trapping agent of a halogen at a temperature ranging from 100° to 500° C.
Claim 3
Dependent Claim
15 words
The process according to claim 1 wherein said trapping agent of a halogen is copper.
Claim 4
Dependent Claim
29 words
The process according to claim 1 wherein said coupling accompanied by dehalogenation is carried out in a fluidized bed in which said trapping agent of a halogen is packed.
Claim 5
Dependent Claim
34 words
The process according to claim 3 wherein said coupling accompanied with dehalogenation is carried out in the presence of a gas inert to difluorohaloacetyl fluoride, a trapping agent of a halogen and perfluorosuccinyl fluoride.
References Cited (Backward Citations)
GB2052501A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-04-11 | 1986-10-11 | 1987-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-04-11 | 1990-10-11 | 1991-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-04-11 | 1994-10-11 | 1995-04-12 | $7700.00 | Window Closed / Lapsed |