US3622848A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Capacitor with photocrosslinked dielectric
Assignee: EIDP Inc
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Filing: 1970-03-19
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Granted: 1971-11-23
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Expires: 1990-03-19
Abstract
Abstract Films of photocrosslinked blends of linear polypropylene with 0.02 to 2 weight percent of a photo-sensitizing agent are used as dielectric spacers for capacitors. The sensitizing agent can be polymeric, e.g., a copolymer of ethylene and acryloxy benzophenone, or nonpolymeric, e.g., 2-methyl-anthraquinone. The films are advantageously oriented after extrusion and before cross-linking.
Inventors
- 👤 William Robert Hendrix
- 👤 Stanley Tocker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:15
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/44; H01B3/441; H01G; H01G4/00; H01G4/002; H01G4/018; H01G4/06; H01G4/14; H01G4/18
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
20 words
Capacitor of claim 1 wherein said blend contains up to about 20 percent of poly- Alpha -olefin other than polypropylene.
Claim 2
Dependent Claim
22 words
Capacitor of claim 2 wherein said blend contains less than 10 percent poly- Alpha -olefin and less than 1 percent photosensitizing agent.
Claim 3
Dependent Claim
9 words
Capacitor of claim 1 wherein said monomer is acryloxybenzophenone.
Claim 4
Dependent Claim
9 words
Capacitor of claim 1 wherein said monomer is methacryloxybenzophenone.
Claim 5
Dependent Claim
37 words
In a capacitor comprising at least a pair of electrodes separated with a dielectric spacer, the improvement wherein said dielectric is a photocrosslinked blend of linear polypropylene with from 0.02 to 2 weight percent of 2-methyl anthraquinone.
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) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |