Patent US3190822A successfully refreshed from Google Patents.
US3190822A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for electrolytically etching valve metal surfaces
Assignee: Individual
•
Filing: 1961-01-09
•
Granted: 1965-06-22
•
Expires: 1981-01-09
Abstract
No abstract record available.
Inventors
- 👤 Burnham John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:19
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
76 words
A PROCESS FOR ELECTROLYTICALLY ETCHING AN INERT VALVE METAL SELECTED FROM THE GROUP CONSISTING OF TANTALUM, NIOBIUM AND TITANIUM WHICH COMPRISES: ELECTROCHEMICALLY ETCHING AN INERT VALVE METAL MEMBER COMPRISING AN INERT VALVE METAL SELECTED FROM THE GROUP CONSISTING OF TANTALUM, NIOBIUM AND TITANIUM IN AN ELECTROLYTE INCLUDING A NON-AQUEOUS SOLVENT AND AN IONOGEN SOLUTE DISSOLVED IN SAID SOLVENT, SAID SOLUTE PROVIDING HALOGEN RADICALS IN SAID ELECTROLYTE, SAID ELECTROLYTE ALSO INCLUDING AN ADDITIVE HAVING THE GENERAL FORMULA
Claim 2
Dependent Claim
76 words
A PROCESS FOR ELECTROLYTICALLY ETCHING AN INERT VALVE METAL SELECTED FROM THE GROUP CONSISTING OF TANTALUM, NIOBIUM AND TITANIUM WHICH COMPRISES: ELECTROCHEMICALLY ETCHING AN INERT VALVE METAL MEMBER COMPRISING AN INERT VALVE METAL SELECTED FROM THE GROUP CONSISTING OF TANTALUM, NIOBIUM AND TITANIUM IN AN ELECTROLYTE INCLUDING A NON-AQUEOUS SOLVENT AND AN IONOGEN SOLUTE DISSOLVED IN SAID SOLVENT, SAID SOLUTE PROVIDING HALOGEN RADICALS IN SAID ELECTROLYTE, SAID ELECTROLYTE ALSO INCLUDING AN ADDITIVE HAVING THE GENERAL FORMULA
References Cited (Backward Citations)
CA593403A
Cited
US2443170A
Cited
US2699599A
Cited
US2742416A
Cited
US2775553A
Cited
US2863811A
Cited
US3070522A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-06-21 | 1968-12-21 | 1969-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-21 | 1972-12-21 | 1973-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-21 | 1976-12-21 | 1977-06-22 | $7700.00 | Window Closed / Lapsed |