US3864228A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Moldable and heat recoverable composition comprising an admixture of vinylidene fluoride/hexafluoropropylene copolymer and a polymer of vinylidene fluoride
Assignee: Sanwa Business Credit Corp
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Filing: 1973-07-13
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Granted: 1975-02-04
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Expires: 1993-07-13
Abstract
Abstract A moldable and heat recoverable composition with improved heat aging and electrical insulating characteristics comprising an admixture of vinylidene fluoride/hexafluoropropylene copolymer and a polymer of vinylidene fluoride, which may be the homopolymer, cross-linked by exposure to from 1 to 20 megarads of ionizing radiation. The resultant composition has qualities superior to the starting components, and its flexibility can be controlled by the relative amount of each component added to the admixture.
Inventors
- 👤 Jr Louis F Rossetti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:01
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/44; H01B3/443; H01B3/445; C; C08; C08L; C08L27/00; C08L27/02; C08L27/12; C08L27/16; C08L27/20; C08L2205/00; C08L2205/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
18 words
The novel composition of claim 1 wherein said polymer of vinylidene fluoride is a homopolymer of vinylidene fluoride.
Claim 2
Dependent Claim
70 words
A molded structure comprising an admixture of vinylidene fluoride/hexafluoropropylene copolymer, containing from 70 to 30% by weight of vinylidene fluoride units and from 30 to 70% by weight of hexafluoropropene units, and a polyvinylidene fluoride, cross-linked by irradiation with high-energy electrons in a range of approximately 2-100 megarads, and wherein the ratio by weight of vinylidene fluoride/hexafluoropropylene copolymer to vinylidene fluoride polymer is in the range of 225:275 to 70:430.
References Cited (Backward Citations)
US3769371A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-03 | 1978-08-05 | 1979-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-03 | 1982-08-05 | 1983-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-03 | 1986-08-05 | 1987-02-04 | $7700.00 | Window Closed / Lapsed |