US2918501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internally unsaturated perfluoroolefins and preparation thereof
Assignee: EIDP Inc
•
Filing: 1958-02-27
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Granted: 1959-12-22
•
Expires: 1978-02-27
Abstract
No abstract record available.
Inventors
- 👤 Brehm Warren John
- 👤 Bremer Keith George
- 👤 Eleuterio Herbert Sousa
- 👤 Meschke Robert Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:03
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/26; C07C17/272; C07C17/278; C07C17/281; C07C17/35; C07C17/358; C07C21/00; C07C21/02; C07C21/18
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
10 words
INTERNALLY UNSATURATED PERFLUOROCARBONS HAVING STRUCTURES OF THE CLASS CONSISTING OF
Claim 2
Dependent Claim
10 words
INTERNALLY UNSATURATED PERFLUOROCARBONS HAVING STRUCTURES OF THE CLASS CONSISTING OF
Claim 3
Dependent Claim
112 words
THE PROCESS OF PREPARING INTERNALLY UNSATURATED PERFLUOROOLEFINS WHICH COMPRISES CONTAINING A TERMINALLY UNSATURATED PERFLUOROOLEFIN HAVING AT LEAST 3 CARBON ATOMS WITH A CATALYST-SOLVENT COMBINATION OF THE CLASS CONSISTING OF (A) HALIDES AND HYDROXIDES OF METALS OF GROUPS 1 OF THE PERIODIC TABLE OF ELEMENTS AS THE CATALYST IS COMBINATION WITH SOLVENTS OF THE CLASS CONSISTING OF N,N-DIALKYLAMIDES, N,N-DIALKYLPHENYLAMINES AND DIALKYLSULFOXIDES, AND (B) QUATERNARY AMMONIUM COMPOUNDS HAVING THE GENERAL FORMULA NR4X WHERE R IS A HYDROCARBON RADICAL AND X IS AN ANION AS THE CATALYST COMPONENT IN COMBINATION WITH INNERT SOLVENTS OF THE CLASS CONSISTING OF HYDROCARBONS, N,N-DIALKYLAMINES AND N,N-DIALKYLAMIDES AT A TEMPERATURE OF 3* TO 200*C. AND RECOVERING AN INTERNALLY UNSATURATED PURFLUOROOLEFIN.
Claim 4
Dependent Claim
112 words
THE PROCESS OF PREPARING INTERNALLY UNSATURATED PERFLUOROOLEFINS WHICH COMPRISES CONTAINING A TERMINALLY UNSATURATED PERFLUOROOLEFIN HAVING AT LEAST 3 CARBON ATOMS WITH A CATALYST-SOLVENT COMBINATION OF THE CLASS CONSISTING OF (A) HALIDES AND HYDROXIDES OF METALS OF GROUPS 1 OF THE PERIODIC TABLE OF ELEMENTS AS THE CATALYST IS COMBINATION WITH SOLVENTS OF THE CLASS CONSISTING OF N,N-DIALKYLAMIDES, N,N-DIALKYLPHENYLAMINES AND DIALKYLSULFOXIDES, AND (B) QUATERNARY AMMONIUM COMPOUNDS HAVING THE GENERAL FORMULA NR4X WHERE R IS A HYDROCARBON RADICAL AND X IS AN ANION AS THE CATALYST COMPONENT IN COMBINATION WITH INNERT SOLVENTS OF THE CLASS CONSISTING OF HYDROCARBONS, N,N-DIALKYLAMINES AND N,N-DIALKYLAMIDES AT A TEMPERATURE OF 3* TO 200*C. AND RECOVERING AN INTERNALLY UNSATURATED PURFLUOROOLEFIN.
References Cited (Backward Citations)
US2716141A
Cited
US2668864A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-21 | 1963-06-22 | 1963-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-21 | 1967-06-22 | 1967-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-21 | 1971-06-22 | 1971-12-22 | $7700.00 | Window Closed / Lapsed |