US2997429A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electropolishing of titanium and titanium alloys
Assignee: Westinghouse Electric Corp
•
Filing: 1959-02-26
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Granted: 1961-08-22
•
Expires: 1979-02-26
Abstract
No abstract record available.
Inventors
- 👤 Kenneth L Rohrer
- 👤 John B Diffenderfer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:59
CPC Classifications
C; C25; C25F; C25F3/00; C25F3/16; C25F3/22; C25F3/26
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
80 words
THE METHOD OF ELECTROLYTICALLY POLISHING ARTICLES OF TIANIUM AND TITANIUM BASE ALLOYS WHICH COMPRISES MAKING THE TITANIUM ARTICLE THE ANODE IN AN AQUEOUS ELECTROLYTE CONSISTING ESSENTIALLY OF, BY WEIGHT, 324 PARTS OF SULFURIC ACID, FROM ABOUT 19 PARTS TO 49 PARTS OF HYDROFLUORIC ACID, AND FROM ABOUT 4 PARTS TO 30 PARTRS OF 48% TO 50% FLUOBORIC ACID AND PASSING CURRENT THERETHROUGH OF SUFFICIENT DENSITY AND FOR A SUFFICIENT PERIOD OF TIME TO EFFECT A POLISH ON SAID TITANIUM ARTICLE.
References Cited (Backward Citations)
US2040618A
Cited
US2466095A
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US2549737A
Cited
US2542779A
Cited
US2871425A
Cited
US2780594A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-21 | 1965-02-20 | 1965-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-21 | 1969-02-20 | 1969-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-21 | 1973-02-20 | 1973-08-22 | $7700.00 | Window Closed / Lapsed |