Patent US857721A successfully refreshed from Google Patents.
Patent US3296500A successfully refreshed from Google Patents.
US3296500A
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Electrolytic capacitor with niobium anode and depolarizer in the electrolyte
Assignee: Duracell Inc USA
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Filing: 1963-06-10
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Granted: 1967-01-03
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Expires: 1983-06-10
Abstract
No abstract record available.
Inventors
- 👤 James M Booe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:23
CPC Classifications
H; H01; H01G; H01G9/00; H01G9/004; H01G9/022; H01G9/145
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
AN ELECTROLYTIC CAPACITOR COMPRISING, IN COMBINATION, A NIOBIUM ANODE HAVING A DIELECTRIC FILM THEREON, A CATHODE OF A METAL SELECTED FROM THE GROUP CONSISTING OF COPPER AND SILVER, AND ELECTROLYTE OF SULFURIC ACID HAVING A CONCENTRATION BETWEEN 5% AND 75% AND BEING SUBSTANTIALLY SATURATED WITH IONS OF THE CATHODE METAL IN CONTACT WITH SAID ANODE AND CATHODE, AND A COMPOUND OF THE CATHODE METAL IN SOLID FORM IN CONTACT WITH SAID ELECTROLYTE, SAID COMPOUND BEING SOLUBLE IN THE ELECTROLYTE AND BEING ADAPTED TO MAINTAIN THE CONCENTRATION OF IONS OF THE CATHODE METAL THEREIN AT SATURATION DURING THE OPERATIVE LIFE OF THE CAPACITOR.
Claim 2
Dependent Claim
102 words
AN ELECTROLYTIC CAPACITOR COMPRISING, IN COMBINATION, A NIOBIUM ANODE HAVING A DIELECTRIC FILM THEREON, A CATHODE OF A METAL SELECTED FROM THE GROUP CONSISTING OF COPPER AND SILVER, AND ELECTROLYTE OF SULFURIC ACID HAVING A CONCENTRATION BETWEEN 5% AND 75% AND BEING SUBSTANTIALLY SATURATED WITH IONS OF THE CATHODE METAL IN CONTACT WITH SAID ANODE AND CATHODE, AND A COMPOUND OF THE CATHODE METAL IN SOLID FORM IN CONTACT WITH SAID ELECTROLYTE, SAID COMPOUND BEING SOLUBLE IN THE ELECTROLYTE AND BEING ADAPTED TO MAINTAIN THE CONCENTRATION OF IONS OF THE CATHODE METAL THEREIN AT SATURATION DURING THE OPERATIVE LIFE OF THE CAPACITOR.
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) | 1970-01-02 | 1970-07-04 | 1971-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-02 | 1974-07-04 | 1975-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-02 | 1978-07-04 | 1979-01-03 | $7700.00 | Window Closed / Lapsed |