US4173033A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymeric dielectric for capacitors and the like consisting essentially of a vinylidene fluoride-trifluoroethylene copolymer
Assignee: Daikin Industries Ltd
•
Filing: 1978-03-22
•
Granted: 1979-10-30
•
Expires: 1998-03-22
Abstract
Abstract A polymeric dielectric having an outstanding dielectric constant, which essentially consists of a copolymer of vinylidene fluoride and triflouroethylene in a molar ratio of from about 95:5 to 10:90, preferably of from about 85:15 to 20:80, more preferably of from about 75:25 to 35:65.
Inventors
- 👤 Junichi Sako
- 👤 Masayoshi Tatemoto
- 👤 Shoji Kawachi
- 👤 Toshiharu Yagi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:57
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/44; H01B3/443; H01B3/445; C; C08; C08F; C08F214/00; C08F214/18; C08F214/22
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
32 words
A polymeric dielectric in film form having an outstanding dielectric constant, which essentially consists of a copolymer of vinylidene fluoride and trifluoroethylene in a molar ratio of from about 75:25 to 35:65.
Claim 2
Dependent Claim
32 words
A polymeric dielectric in film form having an outstanding dielectric constant, which essentially consists of a copolymer of vinylidene fluoride and trifluoroethylene in a molar ratio of from about 75:25 to 35:65.
Claim 3
Dependent Claim
37 words
A process for making an electronic apparatus comprising dielectric materials which comprises shaping a copolymer of vinylidene fluoride and trifluoroethylene in a molar ratio of from about 75:25 to 35:65 into a film for the dielectric material.
Claim 4
Dependent Claim
37 words
A process for making an electronic apparatus comprising dielectric materials which comprises shaping a copolymer of vinylidene fluoride and trifluoroethylene in a molar ratio of from about 75:25 to 35:65 into a film for the dielectric material.
Claim 5
Dependent Claim
19 words
The process according to claim 2, wherein the shaping is effected by molding the copolymer in a melt state.
Claim 6
Dependent Claim
22 words
The process according to claim 2, wherein the shaping is effected by coating the copolymer in a solution onto a substrate material.
Claim 7
Dependent Claim
13 words
A capacitor comprising a polymeric dielectric in film form according to claim 1.
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) | 1982-10-29 | 1983-04-30 | 1983-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-29 | 1987-04-30 | 1987-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-29 | 1991-04-30 | 1991-10-30 | $7700.00 | Window Closed / Lapsed |