Patent US2544366A successfully refreshed from Google Patents.
Patent US2796366A successfully refreshed from Google Patents.
US2796366A
Expired / Lapsed
US
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Process and bath for descaling metals
Assignee: EIDP Inc
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Filing: 1955-10-31
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Granted: 1957-06-18
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Expires: 1975-10-31
Abstract
No abstract record available.
Inventors
- 👤 Giles F Carter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:05
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
THE PROCESS FOR REMOVING OXIDE SCALE FROM THE SURFACE OF AN ARTICLE FORMED FROM A METAL SUBSTANTIALLY NONREACTIVE WITH ALKALI METAL HYDROXIDES WHICH COMPRISES CONTACING SAID ARTICLE AT A TEMPERATURE BELOW THE MELTING POINT THEREOF WITH A MOLTEN COMPOSITION COMPRISING A MOLTEN ALKALI METAL HYDROXIDE TO WHICH HAS BEEN SUPPLIED ABOUT 0.3-10% BY WEIGHT, BASED ON WEIGHT OF THE TOTAL COMPOSITION, OF THE OXIDE OF AN ALKALI METAL, ABOUT 0.320% BY WEIGHT OF AN ALKALI METAL HYDRIDE, AND ABOUT 0.2-10% BY WEIGHT OF IRON DISSOLVED AS ONE OF ITS OXIDIC COMPOUNDS AND SUBSEQUENTLY REMOVING THE RESULTING REDUCED SCALE THEREFROM.
Claim 2
Dependent Claim
99 words
THE PROCESS FOR REMOVING OXIDE SCALE FROM THE SURFACE OF AN ARTICLE FORMED FROM A METAL SUBSTANTIALLY NONREACTIVE WITH ALKALI METAL HYDROXIDES WHICH COMPRISES CONTACING SAID ARTICLE AT A TEMPERATURE BELOW THE MELTING POINT THEREOF WITH A MOLTEN COMPOSITION COMPRISING A MOLTEN ALKALI METAL HYDROXIDE TO WHICH HAS BEEN SUPPLIED ABOUT 0.3-10% BY WEIGHT, BASED ON WEIGHT OF THE TOTAL COMPOSITION, OF THE OXIDE OF AN ALKALI METAL, ABOUT 0.320% BY WEIGHT OF AN ALKALI METAL HYDRIDE, AND ABOUT 0.2-10% BY WEIGHT OF IRON DISSOLVED AS ONE OF ITS OXIDIC COMPOUNDS AND SUBSEQUENTLY REMOVING THE RESULTING REDUCED SCALE THEREFROM.
References Cited (Backward Citations)
US2377876A
Cited
US2353026A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-06-17 | 1960-12-17 | 1961-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-17 | 1964-12-17 | 1965-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-17 | 1968-12-17 | 1969-06-18 | $7700.00 | Window Closed / Lapsed |