Patent US2920256A successfully refreshed from Google Patents.
US2920256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical apparatus and solid dielectric therefor
Assignee: Westinghouse Electric Corp
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Filing: 1956-03-14
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Granted: 1960-01-05
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Expires: 1976-03-14
Abstract
No abstract record available.
Inventors
- 👤 Charles W Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:44
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/185; H01B3/48; H01B3/485; H01G; H01G4/00; H01G4/002; H01G4/018; H01G4/06; H01G4/14; H01G4/18; H01G4/183; H05; H05B; H05B33/00; H05B33/12; H05B33/20; Y; Y10; Y10S; Y10S8/00; Y10S8/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
29 words
AN ELECTRICAL CAPACITOR COMPRISING, IN COMBINATION, ELECTRODES, AND A SHEET MATERIAL SEPARATING AND INSULATING THE ELECTRODES FROM ONE ANOTHER, THE SHEET MATERIAL COMPRISING CYANOETHYL CELLULOSE CONTAINING ABOUT 13% NITROGEN.
Claim 2
Dependent Claim
29 words
AN ELECTRICAL CAPACITOR COMPRISING, IN COMBINATION, ELECTRODES, AND A SHEET MATERIAL SEPARATING AND INSULATING THE ELECTRODES FROM ONE ANOTHER, THE SHEET MATERIAL COMPRISING CYANOETHYL CELLULOSE CONTAINING ABOUT 13% NITROGEN.
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) | 1963-01-04 | 1963-07-06 | 1964-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-04 | 1967-07-06 | 1968-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-04 | 1971-07-06 | 1972-01-05 | $7700.00 | Window Closed / Lapsed |