US3056767A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymers of vinylidene fluoride, hexafluoropropene, and perfluoro-2-butene
Assignee: EIDP Inc
•
Filing: 1960-11-14
•
Granted: 1962-10-02
•
Expires: 1980-11-14
Abstract
No abstract record available.
Inventors
- 👤 Pailthorp John Raymond
- 👤 Smith John Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:14
CPC Classifications
C; C08; C08F; C08F214/00; C08F214/18; C08F214/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
ELASTOMERIC COPOLYMERS PREPARED BY COPOLYMERIZING A MIXTURE OF MONOMERS CONSISTING ESSENTIALLY OF 1 TO 3 MOLES OF VINYLIDENE FLUORIDE WITH 0.8 TO 0.4 MOLE OF HEXAFLUOROPROPENE AND 0.2 TO 0.6 MOLE OF PERFLUORO-2BUTENE, THE MOLAR SUM OF SAID HEXAFLUOROPROPENE AND SAID PERFLUORO-2-BUTENE BEING EQUAL TO 1.0, SAID POLYMERIZATION BEING CARRIED OUT UNDER SUPERATMOSPHERIC PRESSURE AT A TEMPERATURE WITHIN THE RANGE OF FROM 50*C. TO 150*C. IN THE PRESENCE OF A FREE-RADICAL CATALYST.
Claim 2
Dependent Claim
72 words
ELASTOMERIC COPOLYMERS PREPARED BY COPOLYMERIZING A MIXTURE OF MONOMERS CONSISTING ESSENTIALLY OF 1 TO 3 MOLES OF VINYLIDENE FLUORIDE WITH 0.8 TO 0.4 MOLE OF HEXAFLUOROPROPENE AND 0.2 TO 0.6 MOLE OF PERFLUORO-2BUTENE, THE MOLAR SUM OF SAID HEXAFLUOROPROPENE AND SAID PERFLUORO-2-BUTENE BEING EQUAL TO 1.0, SAID POLYMERIZATION BEING CARRIED OUT UNDER SUPERATMOSPHERIC PRESSURE AT A TEMPERATURE WITHIN THE RANGE OF FROM 50*C. TO 150*C. IN THE PRESENCE OF A FREE-RADICAL CATALYST.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-01 | 1966-04-02 | 1966-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-01 | 1970-04-02 | 1970-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-01 | 1974-04-02 | 1974-10-02 | $7700.00 | Window Closed / Lapsed |