US3345544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid aluminum capacitors having a proted dielectric oxide film
Assignee: Duracell Inc USA
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Filing: 1965-05-17
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Granted: 1967-10-03
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Expires: 1985-05-17
Abstract
No abstract record available.
Inventors
- 👤 James E Metcalfe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:32
CPC Classifications
H; H01; H01G; H01G9/00; H01G9/0029; H01G9/004; H01G9/04; H01G9/048; H01G9/055; H01G9/08; H01G9/15; H01G9/151
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
A SOLID ELECTROLYTE ALUMINUM CAPACITOR COMPRISING: (A) AN ETCHED ALUMINUM ANODE HAVING AN ANODE LEAD AFFIXED THERETO, THE SURFACE OF SAID ANODE CHARACTERIZED BY INTERCOMMUNICATING VOIDS; (B) AN ELECTROLYTICALLY FORMED DIELECTRIC ANODIC FILM OVER THE ENTIRE SURFACE OF SAID ETCHED ANODE; (C) A PROTECTIVE FILM OVER SAID ANODIC FILM, SAID PROTECTIVE FILM BEING A CONVERSION PRODUCET OF INORGANIC PHOSPHATES APPLIED TO THE ANODIC FILM FOR PREVENTING DAMAGE TO SAID ANODIC FILM; (D) A LAYER OF MANGANESE DIOXIDE IN INTIMATE CONTACT WITH SAID PROTECTIVE FILM THROUGHOUT SAID VOIDS AND INCLUDING THE EXTERIOR SURFACE OF SAID ANODE; (E) A LAYER OF GRAPHITE OVERLYING SAID LAYER OF MANGANESE DIOXIDE; (F) A CATHODE COATING IN ELECTRICAL CONTACT WITH SAID LAYER OF GRAPHITE, SAID CATHODE COATING HAVING A CATHODE LEAD ATTACHED THERETO; AND (G) A HOUSING FOR SAID CAPACITOR, SAID ANODE AND CATHODE LEADS EXTENDING THEREFROM.
Claim 2
Dependent Claim
141 words
A SOLID ELECTROLYTE ALUMINUM CAPACITOR COMPRISING: (A) AN ETCHED ALUMINUM ANODE HAVING AN ANODE LEAD AFFIXED THERETO, THE SURFACE OF SAID ANODE CHARACTERIZED BY INTERCOMMUNICATING VOIDS; (B) AN ELECTROLYTICALLY FORMED DIELECTRIC ANODIC FILM OVER THE ENTIRE SURFACE OF SAID ETCHED ANODE; (C) A PROTECTIVE FILM OVER SAID ANODIC FILM, SAID PROTECTIVE FILM BEING A CONVERSION PRODUCET OF INORGANIC PHOSPHATES APPLIED TO THE ANODIC FILM FOR PREVENTING DAMAGE TO SAID ANODIC FILM; (D) A LAYER OF MANGANESE DIOXIDE IN INTIMATE CONTACT WITH SAID PROTECTIVE FILM THROUGHOUT SAID VOIDS AND INCLUDING THE EXTERIOR SURFACE OF SAID ANODE; (E) A LAYER OF GRAPHITE OVERLYING SAID LAYER OF MANGANESE DIOXIDE; (F) A CATHODE COATING IN ELECTRICAL CONTACT WITH SAID LAYER OF GRAPHITE, SAID CATHODE COATING HAVING A CATHODE LEAD ATTACHED THERETO; AND (G) A HOUSING FOR SAID CAPACITOR, SAID ANODE AND CATHODE LEADS EXTENDING THEREFROM.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-02 | 1971-04-03 | 1971-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-02 | 1975-04-03 | 1975-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-02 | 1979-04-03 | 1979-10-03 | $7700.00 | Window Closed / Lapsed |