US2564749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stainless steel pickling bath solution
Assignee: Hercules Powder Co
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Filing: 1949-08-16
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Granted: 1951-08-21
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Expires: 1969-08-16
Abstract
No abstract record available.
Inventors
- 👤 Edward A Bried
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:50
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/02; C23G1/08; C23G1/086
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
AN AQUEOUS PICKLING BATH SOLTUION FOR STAINLESS STEEL CONTAINING, IN AMOUNTS BASED ON THE WEIGHT OF THE SOLUTION, BESIDES A COMPLEMENT OF WATER ABOUT 5 TO 20% OF NITRIC ACID, ABOUT 1 TO 5% OF HYDROFLUORIC ACID AND ABOUT 0.001 TO 3% OF A GLYCOL ETHER OF AN ETHANOL ROSIN AMINE HAVING THE GENERAL FORMULA
Claim 2
Dependent Claim
55 words
AN AQUEOUS PICKLING BATH SOLTUION FOR STAINLESS STEEL CONTAINING, IN AMOUNTS BASED ON THE WEIGHT OF THE SOLUTION, BESIDES A COMPLEMENT OF WATER ABOUT 5 TO 20% OF NITRIC ACID, ABOUT 1 TO 5% OF HYDROFLUORIC ACID AND ABOUT 0.001 TO 3% OF A GLYCOL ETHER OF AN ETHANOL ROSIN AMINE HAVING THE GENERAL FORMULA
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) | 1954-08-20 | 1955-02-19 | 1955-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-20 | 1959-02-19 | 1959-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-20 | 1963-02-19 | 1963-08-21 | $7700.00 | Window Closed / Lapsed |