US3023196A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of perfluoroolefin mixtures
Assignee: EIDP Inc
•
Filing: 1958-12-29
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Granted: 1962-02-27
•
Expires: 1978-12-29
Abstract
No abstract record available.
Inventors
- 👤 Bro Manville Isager
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:54
CPC Classifications
C; C08; C08F; C08F214/00; C08F214/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
A PROCESS FOR THE PREPARATION OF PERFLUOROOLEFIN COPOLYMERS WHICH COMPRISES SUBJECTING TETRAFLUOROETHYLENE TOGETHER WITH FROM 1 TO 19 TIMES ITS WEIGHT OF ANOTHER PERFLUOROMONOOLEFON OF 3 TO 9 CARBON ATOMS INCLUSIVE AND HAVING A TERMINAL PERFLUOROMETHYLENE GROUP, TO A TEMPERATURE OF AT LEAST 150*C. IN CONTACT WITH AN INITIATOR OF THE GENERAL FORMULA (X(CF2)N)2Z, WHEREIN Z IS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN AND FLUORINE, Z IS A DIVALENT RADICAL SELECTED FROM THE GROUP CONSISTING OF -S-S- AND -S-HG-S-, AND N IS A WHOLW NUMBER FROM 1 TO 12 INCLUSIVE.
Claim 2
Dependent Claim
91 words
A PROCESS FOR THE PREPARATION OF PERFLUOROOLEFIN COPOLYMERS WHICH COMPRISES SUBJECTING TETRAFLUOROETHYLENE TOGETHER WITH FROM 1 TO 19 TIMES ITS WEIGHT OF ANOTHER PERFLUOROMONOOLEFON OF 3 TO 9 CARBON ATOMS INCLUSIVE AND HAVING A TERMINAL PERFLUOROMETHYLENE GROUP, TO A TEMPERATURE OF AT LEAST 150*C. IN CONTACT WITH AN INITIATOR OF THE GENERAL FORMULA (X(CF2)N)2Z, WHEREIN Z IS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN AND FLUORINE, Z IS A DIVALENT RADICAL SELECTED FROM THE GROUP CONSISTING OF -S-S- AND -S-HG-S-, AND N IS A WHOLW NUMBER FROM 1 TO 12 INCLUSIVE.
References Cited (Backward Citations)
US2468664A
Cited
US2844614A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-26 | 1965-08-28 | 1966-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-26 | 1969-08-28 | 1970-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-26 | 1973-08-28 | 1974-02-27 | $7700.00 | Window Closed / Lapsed |