US3010854A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pickling solution and method
Assignee: Armco Inc
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Filing: 1954-12-31
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Granted: 1961-11-28
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Expires: 1974-12-31
Abstract
No abstract record available.
Inventors
- 👤 Walter R Satterfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:53
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/02; C23G1/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
IN THE DE-SCALING OF STAINLESS STEEL OF 2K% OR MORE TOTAL ALLOY CONTENT, THE ART WHICH COMPRISES CONDITIONING THE METAL SCALE FOR SUBSEQUENT REMOVAL BY IMMERSING THE STEEL IN A BATH OF MOLTEN SODIUM HYDRIDE, REMOVING FROM THE BATH AND WASHING IN WATER, AND THEN SUBJECTING THE STEEL TO AN AQUEOUS SOLUTION ESSENTIALLY COMPRISING 2% TO 15% OF AT LEAST ONE INORGANIC ACID AND .5% TO 40% OF AT LEAST ONE COMPOUND OF THE GROUP CONSISTING OF ION AND DERIVATES OF HYDROFLUOBORIC ACID YIELDING A BOROFLUORIDE ION.
Claim 2
Dependent Claim
31 words
AN AQUEOUS SOLUTION FOR BRIGHTENING, PICKLING AND DE-SCALING STEEL COMPRISING BY WEIGHT ABOUT 2% TO 15% NITRIC ACID, UP TO ABOUT 60% PHOSPHORIC ACID, AND ABOUT .5% TO 40% MAGNESIUM SILICOFLUORIDE.
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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) | 1964-11-27 | 1965-05-29 | 1965-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-11-27 | 1969-05-29 | 1969-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-11-27 | 1973-05-29 | 1973-11-28 | $7700.00 | Window Closed / Lapsed |