US3188201A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for removal of zinc from blast furnace gas wash water
Assignee: Individual
•
Filing: 1962-06-25
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Granted: 1965-06-08
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Expires: 1982-06-25
Abstract
No abstract record available.
Inventors
- 👤 Sontheimer Heinrich
- 👤 Derenk Gunter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:30
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/72; C02F1/74; C21; C21B; C21B3/00; C21B3/04; C21B7/00; C21B7/002; C22; C22B; C22B19/00; C22B19/04; C22B7/00; C22B7/02; C02F2001/007; C02F2101/00; C02F2101/10; C02F2101/20; C02F2103/00; C02F2103/16; C02F2103/18; Y; Y02; Y02P; Y02P10/00; Y02P10/20; Y02W; Y02W30/00; Y02W30/50; Y10; Y10S; Y10S75/00; Y10S75/961
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
A METHOD OF PURIFYING BLAST FURNACE GAS WASH WATER CONTAINING DISSOLVED ZINC AND CARBON DIOXIDE, COMPRISING SEPARATING SUSPENDED SOLIDS FROM THE GAS WASH WATER, THEREAFTER AERATING THE GAS WASH WATER SUBSTANTIALLY FREED OF SUSPENDED SOLIDS TO PRECIPITATE ZINC FROM SOLUTION, AND SEPARATING THE PRECIPITATED ZINC FROM THE WATER.
Claim 2
Independent Claim
48 words
A METHOD OF PURIFYING BLAST FURNACE GAS WASH WATER CONTAINING DISSOLVED ZINC AND CARBON DIOXIDE, COMPRISING SEPARATING SUSPENDED SOLIDS FROM THE GAS WASH WATER, THEREAFTER AERATING THE GAS WASH WATER SUBSTANTIALLY FREED OF SUSPENDED SOLIDS TO PRECIPITATE ZINC FROM SOLUTION, AND SEPARATING THE PRECIPITATED ZINC FROM THE WATER.
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) | 1968-06-07 | 1968-12-07 | 1969-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-07 | 1972-12-07 | 1973-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-07 | 1976-12-07 | 1977-06-08 | $7700.00 | Window Closed / Lapsed |