US2710271A
Expired / Lapsed
US
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Process for annealing and cleaning oxidized metal in a salt bath
Assignee: Huntington Alloys Corp
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Filing: 1951-08-09
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Granted: 1955-06-07
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Expires: 1971-08-09
Abstract
No abstract record available.
Inventors
- 👤 Fernsler Edward Bucke
- 👤 Tschop Harry Edwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:09
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/28; C23G1/32; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4981; Y10T29/49812
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
84 words
IN THE PROCESS FOR ANNEALING AND CLEANING AN OXIDIZED METAL ARTICLE MADE OF AN ALLOY USED FOR RESISTANCE TO HEAT AND TO CORROSION AND CHARACTERIZED BY A REFRACTORY OXIDE COATING CONTAINING PREDOMINANTLY AN OXIDE OF A METAL HAVING AN ATOMIC NUMBER FROM 24 TO 29, THE IMPROVEMENT WHICH COMPRISES IMMERSING THE OXIDIZED ARTICLE IN A SALT BATH COMPRISING ABOUT 20% TO 80% SODIUM FLUORIDE, WITH THE BALANCE ESSENTIALLY SODIUM CARBONATE, FOR AT LEAST ABOUT TWO MINUTES AT A TEMPERATURE OF ABOUT 1500* TO 2000*F.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-06-06 | 1958-12-06 | 1959-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-06-06 | 1962-12-06 | 1963-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-06-06 | 1966-12-06 | 1967-06-07 | $7700.00 | Window Closed / Lapsed |