US3197341A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and composition for descaling stainless steels and related alloys
Assignee: Rohr Inc
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Filing: 1961-06-19
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Granted: 1965-07-27
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Expires: 1981-06-19
Abstract
No abstract record available.
Inventors
- 👤 Wilfred J Wallace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:45
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/02; C23G1/08; C23G1/085; C23G1/28; C23G1/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
THE METHOD OF DESCALING STAINLESS STEEL METALS AND RELATED ALLOYS THEREOF COMPRISING TREATING SAID METALS FOR FROM 3 TO 15 MINUTES IN AN AQUEOUS SOLUTION MAINTAINED AT A TEMPERATURE OF FROM 65 TO 110*F., SAID SOLUTION CONSISTING ESSENTIALLY OF FROM 16.0 TO 20.0% BY WEIGHT 42* BE. FERRIC CHLORIDE, FROM 1.0 TO 3.5% BY WEIGHT 66* BE. SULPHURIC ACID, FROM 1.2 TO 4.0% BY WEIGHT 42* BE. NITRIC ACID, AND THE REMAINDER WATER.
Claim 2
Independent Claim
73 words
THE METHOD OF DESCALING STAINLESS STEEL METALS AND RELATED ALLOYS THEREOF COMPRISING TREATING SAID METALS FOR FROM 3 TO 15 MINUTES IN AN AQUEOUS SOLUTION MAINTAINED AT A TEMPERATURE OF FROM 65 TO 110*F., SAID SOLUTION CONSISTING ESSENTIALLY OF FROM 16.0 TO 20.0% BY WEIGHT 42* BE. FERRIC CHLORIDE, FROM 1.0 TO 3.5% BY WEIGHT 66* BE. SULPHURIC ACID, FROM 1.2 TO 4.0% BY WEIGHT 42* BE. NITRIC ACID, AND THE REMAINDER WATER.
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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) | 1968-07-26 | 1969-01-25 | 1969-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-26 | 1973-01-25 | 1973-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-26 | 1977-01-25 | 1977-07-27 | $7700.00 | Window Closed / Lapsed |