US3676164A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of waste sulfite liquor to avoid pollution,and method of making
Assignee: Wire Sales Co
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Filing: 1970-04-20
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Granted: 1972-07-11
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Expires: 1990-04-20
Abstract
Abstract HARD BRIQUETTES SUITABLE FOR USE IN THE BUILDING ARTS CAN BE FORMED FROM THE WASTE PRODUCTS OBTAINED FROM THE TREATMENT OF WASTE SULFITE LIQUOR. USING LIME AS THE TREATING AGENT, CALCIUM SULFATE IS OBTAINED AS A BY-PRODUCT FROM THE TREATMENT OF WASTE SULFITE LIQUOR FROM PAPER PULP OPERATIONS. IRON OXIDE, MINERAL FILLERS AND A SUITABLE BINDER ARE USED TO MAKE THE BRIQUETTES.
Inventors
- 👤 Harry Silby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:43
CPC Classifications
C; C04; C04B; C04B11/00; C04B11/26; C04B11/262; C01; C01F; C01F11/00; C01F11/46; C04B18/00; C04B18/04; C04B18/0481; C04B28/00; C04B28/24; C04B28/26; C04B2111/00; C04B2111/20; C04B2111/27; C04B2111/28; C04B2111/30; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/91
Claims Analysis
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References Cited (Backward Citations)
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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) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |