Patent US2981647A successfully refreshed from Google Patents.
US2981647A
Expired / Lapsed
US
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Fabrication of electrolytic capacitor
Assignee: AT&T Inc
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Filing: 1958-09-04
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Granted: 1961-04-25
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Expires: 1978-09-04
Abstract
No abstract record available.
Inventors
- 👤 Schwartz Newton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:57
CPC Classifications
H; H01; H01G; H01G9/00; H01G9/15
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
IN THE FABRICATION OF AN ALUMINUM SOLID ELECTROLYTIC CAPACITOR IN WHICH THE ANODE OF SAID CAPACITOR IS COATED WITH MANGANESE DIOXIDE FORMED IN SITU BY PYROLYSIS AT A TEMPERATURE OF AT LEAST 300*C., THE STEPS OF ANNEALING THE ALUMINUM BODY DESTINED FOR USE AS THE SAID ANODE IN THE SAID CAPACITOR FOR AT LEAST TEN MINUTES AT A TEMPERATURE AT LEAST EQUAL TO THE TEMPERATURE EMPLOYED IN THE PYROLYSIS STEP IN WHICH MANGANESE DIOXIDE IS FORMED IN SITU.
Claim 2
Dependent Claim
78 words
IN THE FABRICATION OF AN ALUMINUM SOLID ELECTROLYTIC CAPACITOR IN WHICH THE ANODE OF SAID CAPACITOR IS COATED WITH MANGANESE DIOXIDE FORMED IN SITU BY PYROLYSIS AT A TEMPERATURE OF AT LEAST 300*C., THE STEPS OF ANNEALING THE ALUMINUM BODY DESTINED FOR USE AS THE SAID ANODE IN THE SAID CAPACITOR FOR AT LEAST TEN MINUTES AT A TEMPERATURE AT LEAST EQUAL TO THE TEMPERATURE EMPLOYED IN THE PYROLYSIS STEP IN WHICH MANGANESE DIOXIDE IS FORMED IN SITU.
References Cited (Backward Citations)
GB173742A
Cited
US1811298A
Cited
US1946147A
Cited
US2400804A
Cited
US2868702A
Cited
US2859148A
Cited
US2829076A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-24 | 1964-10-24 | 1965-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-24 | 1968-10-24 | 1969-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-24 | 1972-10-24 | 1973-04-25 | $7700.00 | Window Closed / Lapsed |