US2863811A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of etching capacitor electrodes
Assignee: General Electric Co
•
Filing: 1955-05-09
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Granted: 1958-12-09
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Expires: 1975-05-09
Abstract
No abstract record available.
Inventors
- 👤 Ralph A Ruscetta
- 👤 Alfred L Jenny
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:51
CPC Classifications
H; H01; H01G; H01G9/00; H01G9/004; H01G9/04; H01G9/048; H01G9/055; C; C25; C25F; C25F3/00; C25F3/02; C25F3/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
THE METHOD OF ELECTROLYTICALLY ETCHING TANTALUM WHICH COMPRISES MAKING THE TANTALUM THE ANODE IN AN ELECTROLYTE SOLUTION CONSISTING ESSENTIALLY OF FROM 6.5 TO 99% BY WEIGHT OF METANOL, FROM ABOUT 87 TO 0% BY WEIGHT OF AN ORGANIC LIQUID MISCIBLE WITH METHANOL AND FROM 3000 TO 135,000 P. P. M. OF WATER, AND AT LEAST ONE METHANOL-SOLUBLE INORGANIC SALT DISSOLVED THEREIN PRODUCING A SOLUTION HAVING A CONDUCTIVITY CAPABLE OF PASSING A CURRENT THERETHROUGH AND BEING INCAPABLE OF PRODUCING A FILM ON THE METAL WHEN CURRENT IS PASSED THROUGH THE ELECTROLYTE SOLUTION, SAID ORGANIC LIQUID FORMING WITH SAID METHANOL AND WATER A COMBINED SOLVENT FOR SAID INORGANIC SALT.
Claim 2
Independent Claim
107 words
THE METHOD OF ELECTROLYTICALLY ETCHING TANTALUM WHICH COMPRISES MAKING THE TANTALUM THE ANODE IN AN ELECTROLYTE SOLUTION CONSISTING ESSENTIALLY OF FROM 6.5 TO 99% BY WEIGHT OF METANOL, FROM ABOUT 87 TO 0% BY WEIGHT OF AN ORGANIC LIQUID MISCIBLE WITH METHANOL AND FROM 3000 TO 135,000 P. P. M. OF WATER, AND AT LEAST ONE METHANOL-SOLUBLE INORGANIC SALT DISSOLVED THEREIN PRODUCING A SOLUTION HAVING A CONDUCTIVITY CAPABLE OF PASSING A CURRENT THERETHROUGH AND BEING INCAPABLE OF PRODUCING A FILM ON THE METAL WHEN CURRENT IS PASSED THROUGH THE ELECTROLYTE SOLUTION, SAID ORGANIC LIQUID FORMING WITH SAID METHANOL AND WATER A COMBINED SOLVENT FOR SAID INORGANIC SALT.
References Cited (Backward Citations)
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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) | 1961-12-08 | 1962-06-09 | 1962-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-08 | 1966-06-09 | 1966-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-08 | 1970-06-09 | 1970-12-09 | $7700.00 | Window Closed / Lapsed |