US2876144A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal pickling solutions and methods
Assignee: Crucible Steel Company of America
•
Filing: 1956-02-24
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Granted: 1959-03-03
•
Expires: 1976-02-24
Abstract
No abstract record available.
Inventors
- 👤 Howard B Bomberger
- 👤 Milton B Vordahl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:52
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/02; C23G1/10; C23G1/106
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
AN AQUEOUS SOLUTION FOR PICKLING TITANIUM, ZIRCONIUM AND ALLOYS OF EACH WITH REMOVAL OF BASIS METAL FROM THE SURFACE WITHOUT ATTENDANT HYDROGEN EMBRITTLEMENT, COMPRISING IN PERCENTAGES BY WEIGHT ABOUT: 0.5 TO 10% PHOSPHORIC ACID, 0.5 TO 10% OF FLUORIDE IONS, AND AT LEAST ONE MEMBER SELECTED FROM THE GROUP CONSISTING OF 15 TO 50% NITRIC ACID, 5 TO 35% HYDROGEN PEROXIDE, AND 2 TO 40% NITRIC ACID TOGETHER WITH 0.5 TO 30% HYDROGEN PEROXIDE.
Claim 2
Dependent Claim
74 words
AN AQUEOUS SOLUTION FOR PICKLING TITANIUM, ZIRCONIUM AND ALLOYS OF EACH WITH REMOVAL OF BASIS METAL FROM THE SURFACE WITHOUT ATTENDANT HYDROGEN EMBRITTLEMENT, COMPRISING IN PERCENTAGES BY WEIGHT ABOUT: 0.5 TO 10% PHOSPHORIC ACID, 0.5 TO 10% OF FLUORIDE IONS, AND AT LEAST ONE MEMBER SELECTED FROM THE GROUP CONSISTING OF 15 TO 50% NITRIC ACID, 5 TO 35% HYDROGEN PEROXIDE, AND 2 TO 40% NITRIC ACID TOGETHER WITH 0.5 TO 30% HYDROGEN PEROXIDE.
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) | 1962-03-02 | 1962-09-01 | 1963-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-02 | 1966-09-01 | 1967-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-02 | 1970-09-01 | 1971-03-03 | $7700.00 | Window Closed / Lapsed |