US2923867A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic capacitors
Assignee: Sprague Electric Co
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Filing: 1956-07-02
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Granted: 1960-02-02
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Expires: 1976-07-02
Abstract
No abstract record available.
Inventors
- 👤 Robinson Preston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:49
CPC Classifications
H; H01; H01G; H01G9/00; H01G9/004; H01G9/022
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
AN ELECTROLYTIC CAPACITOR HAVING A PLURALITY OF ELECTRODES, AT LEAST ONE OF SAID ELECTRODES BEING COMPOSED OF A VALVE METAL WITH A DILELECTRIC FILM FORMED ON THE ELECTRODE SURFACE, A DIELECTRIC FILM PRESERVING ELECTROLYTE CONTIGUOUS WITH SAID ELECTRODES COMPRISING A SOLUTE OF A SALT OF APPROXIMATELY EQUIMOLAR PROPORTIONS OF AN ALKYL AMINE HAVING THE FORMULA:
Claim 2
Dependent Claim
55 words
AN ELECTROLYTIC CAPACITOR HAVING A PLURALITY OF ELECTRODES, AT LEAST ONE OF SAID ELECTRODES BEING COMPOSED OF A VALVE METAL WITH A DILELECTRIC FILM FORMED ON THE ELECTRODE SURFACE, A DIELECTRIC FILM PRESERVING ELECTROLYTE CONTIGUOUS WITH SAID ELECTRODES COMPRISING A SOLUTE OF A SALT OF APPROXIMATELY EQUIMOLAR PROPORTIONS OF AN ALKYL AMINE HAVING THE FORMULA:
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) | 1963-02-01 | 1963-08-03 | 1964-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-01 | 1967-08-03 | 1968-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-01 | 1971-08-03 | 1972-02-02 | $7700.00 | Window Closed / Lapsed |