US2692229A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disposal of waste pickle liquor
Assignee: AO Smith Corp
•
Filing: 1952-05-05
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Granted: 1954-10-19
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Expires: 1972-05-05
Abstract
No abstract record available.
Inventors
- 👤 Heise Lorenz William
- 👤 Johnson Milton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:15
CPC Classifications
C; C01; C01G; C01G49/00; C01F; C01F11/00; C01F11/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
A PROCESS OF TREATING WASTE PICKLE LIQUOR CONTAINING SULPHURIC ACID AND IRON SALTS COMPRISING, MIXING WITH SAID LIQUOR AN ALKALINE EARTH METAL OXIDE TO SUBSTANTIALLY ENTIRELY NEUTRALIZE THE LIQUOR AND TO PRECIPITATE SAID IRON SALTS, OXIDIZING FROM ABOUT 2% TO ABOUT 5% OF THE FERROUS CONSTITUENTS IN THE PRECIPITATE TO THE FERRIC STATE
Claim 2
Dependent Claim
53 words
A PROCESS OF TREATING WASTE PICKLE LIQUOR CONTAINING SULPHURIC ACID AND IRON SALTS COMPRISING, MIXING WITH SAID LIQUOR AN ALKALINE EARTH METAL OXIDE TO SUBSTANTIALLY ENTIRELY NEUTRALIZE THE LIQUOR AND TO PRECIPITATE SAID IRON SALTS, OXIDIZING FROM ABOUT 2% TO ABOUT 5% OF THE FERROUS CONSTITUENTS IN THE PRECIPITATE TO THE FERRIC STATE
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) | 1957-10-18 | 1958-04-19 | 1958-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-10-18 | 1962-04-19 | 1962-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-10-18 | 1966-04-19 | 1966-10-19 | $7700.00 | Window Closed / Lapsed |