US3413205A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic etching of capacitor metal
Assignee: Westinghouse Electric Corp
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Filing: 1966-02-28
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Granted: 1968-11-26
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Expires: 1986-02-28
Abstract
No abstract record available.
Inventors
- 👤 Carl C Hardman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:56
CPC Classifications
H; H01; H01G; H01G9/00; H01G9/004; H01G9/04; H01G9/048; H01G9/055; B; B23; B23H; B23H9/00; B23H9/06; C; C25; C25F; C25F3/00; C25F3/02; C25F3/08
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
97 words
A SOLUTION SUITABLE FOR ETCHING A METAL SELECTED FROM THE GROUP CONSISTING OF TITANIUM, TANTALUM, NIOBIUM AND ZIRCONIUM AND ALLOYS THEREOF, CONSISTING ESSENTIALLY OF (1) AN ANHYDROUS MONHYDRIC ALIPHATIC ALCOHOL HAVING UP TO 7 CARBON ATOMS, (2) AT LEAST ABOUT 2 GRAMS OF AT LEAST ONE SOLUBLE HALIDE SALT OF AMMONIA PER LITER OF SOLUTION, (3) UP TO 20 MILLILITERS OF WATER PER LITER OF SOLUTION, AND (4) AT LEAST ABOUT 0.5 MILLILITER OF AT LEAST ONE SOLUBLE ETCHING INHIBITOR AGENT SELECTED FROM THE GROUP CONSISTING OF ALKYLAMINES, ARYLAMINES, ALKANOLAMINES, ALKYLAMIDES AND ARYLAMIDES, PER LITER OF SOLUTION.
Claim 2
Dependent Claim
97 words
A SOLUTION SUITABLE FOR ETCHING A METAL SELECTED FROM THE GROUP CONSISTING OF TITANIUM, TANTALUM, NIOBIUM AND ZIRCONIUM AND ALLOYS THEREOF, CONSISTING ESSENTIALLY OF (1) AN ANHYDROUS MONHYDRIC ALIPHATIC ALCOHOL HAVING UP TO 7 CARBON ATOMS, (2) AT LEAST ABOUT 2 GRAMS OF AT LEAST ONE SOLUBLE HALIDE SALT OF AMMONIA PER LITER OF SOLUTION, (3) UP TO 20 MILLILITERS OF WATER PER LITER OF SOLUTION, AND (4) AT LEAST ABOUT 0.5 MILLILITER OF AT LEAST ONE SOLUBLE ETCHING INHIBITOR AGENT SELECTED FROM THE GROUP CONSISTING OF ALKYLAMINES, ARYLAMINES, ALKANOLAMINES, ALKYLAMIDES AND ARYLAMIDES, PER LITER OF SOLUTION.
Claim 3
Independent Claim
117 words
THE METHOD ELECTROLYTICALLY ETCHING A METAL SELECTED FROM THE GROUP CONSISTING OT TITANIUM, NIOBIUM, TANTALUM AND ZIRCONIUM AND ALLOYS COMPRISING AT LEAST ONE METAL OF THIS GROUP, WHICH METHOD COMPRISES THE STEPS OF MAKING THE METAL THE ANODE IN A SOLUTION CONTAINING (1) AN ANHYDROUS MONOHYDRIC LOWER ALIPHATIC ALCOHOL HAVING UP TO 7 CARBON ATOMS, (2) AT LEAST ONE HALIDE SALT SOLUBLE IN THE ALCOHOL, AND (3) AT LEAST ABOUT 0.5 MILLILITER OF AT LEAST ONE ETCHING INHIBITOR AGENT SELECTED FROM THE GROUP CONSISTING OF ALKYLAMINES, ARYLAMINES, ALKANOLAMINES, ALKYLAMIDES AND ARYLAMIDES PER LITER OF SOLUTION, AND APPLYING A PULSATING POTENTIAL TO THE ANODE TO DISSOLVE THE METAL IN A MANNER TO PRODUCE A GREATLY INCREASED SURFACE AREA.
Claim 4
Independent Claim
117 words
THE METHOD ELECTROLYTICALLY ETCHING A METAL SELECTED FROM THE GROUP CONSISTING OT TITANIUM, NIOBIUM, TANTALUM AND ZIRCONIUM AND ALLOYS COMPRISING AT LEAST ONE METAL OF THIS GROUP, WHICH METHOD COMPRISES THE STEPS OF MAKING THE METAL THE ANODE IN A SOLUTION CONTAINING (1) AN ANHYDROUS MONOHYDRIC LOWER ALIPHATIC ALCOHOL HAVING UP TO 7 CARBON ATOMS, (2) AT LEAST ONE HALIDE SALT SOLUBLE IN THE ALCOHOL, AND (3) AT LEAST ABOUT 0.5 MILLILITER OF AT LEAST ONE ETCHING INHIBITOR AGENT SELECTED FROM THE GROUP CONSISTING OF ALKYLAMINES, ARYLAMINES, ALKANOLAMINES, ALKYLAMIDES AND ARYLAMIDES PER LITER OF SOLUTION, AND APPLYING A PULSATING POTENTIAL TO THE ANODE TO DISSOLVE THE METAL IN A MANNER TO PRODUCE A GREATLY INCREASED SURFACE AREA.
References Cited (Backward Citations)
US2863811A
Cited
US3190822A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-26 | 1972-05-27 | 1972-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-26 | 1976-05-27 | 1976-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-26 | 1980-05-27 | 1980-11-26 | $7700.00 | Window Closed / Lapsed |