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US2623849A
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Spent pickle liquor treatment
Assignee: Individual
•
Filing: 1948-03-30
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Granted: 1952-12-30
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Expires: 1968-03-30
Abstract
No abstract record available.
Inventors
- 👤 Harry L Peterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:51
CPC Classifications
C; C01; C01G; C01G49/00; C01G49/02; Y; Y10; Y10S; Y10S423/00; Y10S423/01; Y10S423/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A METHOD OF TREATING SPENT FERROUS METAL PICKLING LIQUOR CONTAINING MINERAL ACIDS WHICH CONSISTS IN NEUTRALIZING THE MINERAL ACIDS AND PRECIPITATING THE METALLIC OXIDES THEREIN BY INTRODUCING INTO THE SPENT LIQUOR A NEUTRALIZING TREATING AGENT HAVING A SAPONIFIED FAT CONTENT AND AN ALKALI CONTENT IN A QUANTITY SUFFICIENT TO EFFECT A CURD FORMATION AND REMOVING THE CURD.
Claim 2
Independent Claim
57 words
A METHOD OF TREATING SPENT FERROUS METAL PICKLING LIQUOR CONTAINING MINERAL ACIDS WHICH CONSISTS IN NEUTRALIZING THE MINERAL ACIDS AND PRECIPITATING THE METALLIC OXIDES THEREIN BY INTRODUCING INTO THE SPENT LIQUOR A NEUTRALIZING TREATING AGENT HAVING A SAPONIFIED FAT CONTENT AND AN ALKALI CONTENT IN A QUANTITY SUFFICIENT TO EFFECT A CURD FORMATION AND REMOVING THE CURD.
References Cited (Backward Citations)
US777274A
Cited
GB190824842A
Cited
GB220849A
Cited
GB299919A
Cited
US1793342A
Cited
US1829522A
Cited
US2419945A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-30 | 1956-06-30 | 1956-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-30 | 1960-06-30 | 1960-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-30 | 1964-06-30 | 1964-12-30 | $7700.00 | Window Closed / Lapsed |