Patent US3243316A successfully refreshed from Google Patents.
US3243316A
Expired / Lapsed
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Method of producing electrolytic capacitor with colloidal film on cathode
Assignee: Duracell Inc USA
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Filing: 1961-05-02
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Granted: 1966-03-29
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Expires: 1981-05-02
Abstract
No abstract record available.
Inventors
- 👤 Thomas C O'nan
- 👤 Charles W Walters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:03
CPC Classifications
H; H01; H01G; H01G9/00; H01G9/004; H01G9/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
A PROCESS FOR PREPARING A METAL CONTAINER FOR USE AS THE CATHODE OF AN ELECTROLYTIC CAPACITOR HAVING A TANTALUM ANODE AND LIQUID ELECTROLYTE, SAID PROCESS COMPRISING THE STEPS OF: CHEMICALLY CLEANING THE INTERIOR SURFACE OF SAID CONTAINER; FILLING THE CLEANED CONTAINER WITH A SOLUTION CONSISTING OF COLLOIDAL CARBON IN ALCOHOL; DRAINING SAID CONTAINER IN ANINVERTED POSITION SO AS TO LEAVE A THIN UNIFORM FILM OF SAID COLLOIDAL SOLUTION OVER THE INTERIOR SURFACE THEREOF; AIR DRYING SAID CONTAINER; AND BAKING SAID CONTGAINER FOR ABOUT ONE HOUR AT ABOUT 150*C. SO AS TO EVAPORATE THE ALCOHOL AND LEAVER A TGHIN ADHERING FILM OF COLLOIDAL CARBONOVER THE INTERIOR SURFACE THEREOF.
Claim 2
Dependent Claim
107 words
A PROCESS FOR PREPARING A METAL CONTAINER FOR USE AS THE CATHODE OF AN ELECTROLYTIC CAPACITOR HAVING A TANTALUM ANODE AND LIQUID ELECTROLYTE, SAID PROCESS COMPRISING THE STEPS OF: CHEMICALLY CLEANING THE INTERIOR SURFACE OF SAID CONTAINER; FILLING THE CLEANED CONTAINER WITH A SOLUTION CONSISTING OF COLLOIDAL CARBON IN ALCOHOL; DRAINING SAID CONTAINER IN ANINVERTED POSITION SO AS TO LEAVE A THIN UNIFORM FILM OF SAID COLLOIDAL SOLUTION OVER THE INTERIOR SURFACE THEREOF; AIR DRYING SAID CONTAINER; AND BAKING SAID CONTGAINER FOR ABOUT ONE HOUR AT ABOUT 150*C. SO AS TO EVAPORATE THE ALCOHOL AND LEAVER A TGHIN ADHERING FILM OF COLLOIDAL CARBONOVER THE INTERIOR SURFACE THEREOF.
References Cited (Backward Citations)
US2085413A
Cited
US3082360A
Cited
US2798988A
Cited
US3066247A
Cited
US2936514A
Cited
US3014166A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-28 | 1969-09-27 | 1970-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-28 | 1973-09-27 | 1974-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-28 | 1977-09-27 | 1978-03-29 | $7700.00 | Window Closed / Lapsed |