US3282807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for purifying electrode surfaces
Assignee: Individual
•
Filing: 1962-03-30
•
Granted: 1966-11-01
•
Expires: 1982-03-30
Abstract
No abstract record available.
Inventors
- 👤 Burnham John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:01
CPC Classifications
H; H01; H01G; H01G9/00; H01G9/004; H01G9/04; H01G9/048; C; C25; C25D; C25D11/00; C25D11/02; C25D11/26; Y; Y10; Y10S; Y10S205/00; Y10S205/917
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A METHOD FOR REMOVING CARBON FROM THE SURFACE OF A SINTERED TANTALUM CAPACITOR ANODE WHICH INCLUDES THE STEPS OF: ELECTROLYTICALLY FORMING A TANTALUM OXIDE COATING ON SAID SURFACE; HEATING SAID ANODE UNDER A VACUUM OF FROM ABOUT 10-**6 TO ABOUT 10-**9 MM. OF MERCURY AT A TEMPERATURE OF ABOUT 1800*C. TO ABOUT 2300*C. FOR A PERIOD OF AT LEAST ABOUT FIVE MINUTES; AND COOLING THE SO-HEATED ANODE ANODE TO ABOUT ROOM TEMPERATURE.
Claim 2
Independent Claim
72 words
A METHOD FOR REMOVING CARBON FROM THE SURFACE OF A SINTERED TANTALUM CAPACITOR ANODE WHICH INCLUDES THE STEPS OF: ELECTROLYTICALLY FORMING A TANTALUM OXIDE COATING ON SAID SURFACE; HEATING SAID ANODE UNDER A VACUUM OF FROM ABOUT 10-**6 TO ABOUT 10-**9 MM. OF MERCURY AT A TEMPERATURE OF ABOUT 1800*C. TO ABOUT 2300*C. FOR A PERIOD OF AT LEAST ABOUT FIVE MINUTES; AND COOLING THE SO-HEATED ANODE ANODE TO ABOUT ROOM TEMPERATURE.
References Cited (Backward Citations)
GB857752A
Cited
US292769A
Cited
US2687994A
Cited
US2661329A
Cited
DE912634C
Cited
US2943031A
Cited
US2936514A
Cited
US2872405A
Cited
US3100329A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-31 | 1970-05-02 | 1970-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-31 | 1974-05-02 | 1974-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-31 | 1978-05-02 | 1978-11-01 | $7700.00 | Window Closed / Lapsed |