US4335238A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluoropolymer hexafluoropropene, tetrafluorethene and 1,1-difluoroethene
Assignee: EIDP Inc
•
Filing: 1980-10-06
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Granted: 1982-06-15
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Expires: 2000-10-06
Abstract
Abstract Terpolymer consisting of 12 to 48% by weight TFE units, 7 to 24% by weight HFP units and 30 to 81% by weight VF2 units, provided that when the content of TFE units is less than 42% by weight, the content of HFP units is less than 15% by weight. Heat-stable films such as polyimide film can be coated with a coating comprising the terpolymer to provide heat-sealable film useful as wire insulation.
Inventors
- 👤 Albert L. Moore
- 👤 Clare A. Stewart, Jr.
- 👤 Isadore Swerlick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:48
CPC Classifications
C; C08; C08F; C08F214/00; C08F214/18; C08F214/22; C08F214/26; C08J; C08J7/00; C08J7/04; C08J7/0427; C08J7/052; C08J2427/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/3154
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
58 words
A terpolymer consisting of 12 to 48% by weight of polymerized tetrafluoroethylene units, 7 to 24% by weight of polymerized hexafluoropropylene units and 30 to 81% by weight of polymerized vinylidene fluoride units, provided that when the content of tetrafluoroethylene units is less than 42% by weight, the content of hexafluoropropylene units is less than 13% by weight.
Claim 2
Dependent Claim
58 words
A terpolymer consisting of 12 to 48% by weight of polymerized tetrafluoroethylene units, 7 to 24% by weight of polymerized hexafluoropropylene units and 30 to 81% by weight of polymerized vinylidene fluoride units, provided that when the content of tetrafluoroethylene units is less than 42% by weight, the content of hexafluoropropylene units is less than 13% by weight.
Claim 3
Dependent Claim
30 words
The terpolymer of claim 1 consisting of 44 to 48% by weight tetrafluoroethylene units, 20 to 24% by weight hexafluoropropylene units and 30 to 34% by weight vinylidene fluoride units.
Claim 4
Dependent Claim
30 words
The terpolymer of claim 1 consisting of 12 to 48% by weight tetrafluoroethylene units, 7 to 13% by weight hexafluoropropylene units and 39 to 81% by weight vinylidene fluoride units.
References Cited (Backward Citations)
US2968649A
Cited
US3467636A
Cited
US3801552A
Cited
US3951913A
Cited
US3962169A
Cited
US4027086A
Cited
BE844965A
Cited
US4141874A
Cited
US4123603A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-06-14 | 1985-12-14 | 1986-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-14 | 1989-12-14 | 1990-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-14 | 1993-12-14 | 1994-06-15 | $7700.00 | Window Closed / Lapsed |