Patent US2966431A successfully refreshed from Google Patents.
US2966431A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of filter material from carbon black
Assignee: BASF SE
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Filing: 1957-03-21
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Granted: 1960-12-27
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Expires: 1977-03-21
Abstract
No abstract record available.
Inventors
- 👤 Lorenz Lothar
- 👤 Rost Berthold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:19
CPC Classifications
B; B01; B01D; B01D41/00; B01D41/02; B01D46/00; B01D46/30; B01D46/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
A PROCESS FOR REGENERATING AN EXHAUSTED GRANULAR FILTER MATERIAL HAVING AN ACCUMULATION OF HYDROPHOBIC CARBON BLACK WHICH COMPRISES: INTRODUCING SAID EXHAUSTED FILTER MATERIAL FOR FLOTATION UPON A WATER SURFACE, IMPINGING AT LEAST ONE HIGH VELOCITY JET OF WATER AGAINST SAID FLOATING EXHAUSTED FILTER MATERIAL WITH SUFFICIENT FORCE TO LOOSEN PARTICLES OF HYDROPHOBIC CARBON BLACK THEREFROM, AND WITHDRAWING THE LOOSENED CARBON BLACK PARTICLES AND THE REGENERATED GRANULAR FILTER MATERIAL DOWNWARDLY FROM SAID WATER SURFACE AND SEPARATING THEM FROM EACH OTHER BY HYDRAULIC CLASSIFICATION.
Claim 2
Dependent Claim
82 words
A PROCESS FOR REGENERATING AN EXHAUSTED GRANULAR FILTER MATERIAL HAVING AN ACCUMULATION OF HYDROPHOBIC CARBON BLACK WHICH COMPRISES: INTRODUCING SAID EXHAUSTED FILTER MATERIAL FOR FLOTATION UPON A WATER SURFACE, IMPINGING AT LEAST ONE HIGH VELOCITY JET OF WATER AGAINST SAID FLOATING EXHAUSTED FILTER MATERIAL WITH SUFFICIENT FORCE TO LOOSEN PARTICLES OF HYDROPHOBIC CARBON BLACK THEREFROM, AND WITHDRAWING THE LOOSENED CARBON BLACK PARTICLES AND THE REGENERATED GRANULAR FILTER MATERIAL DOWNWARDLY FROM SAID WATER SURFACE AND SEPARATING THEM FROM EACH OTHER BY HYDRAULIC CLASSIFICATION.
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) | 1963-12-27 | 1964-06-27 | 1964-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-27 | 1968-06-27 | 1968-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-27 | 1972-06-27 | 1972-12-27 | $7700.00 | Window Closed / Lapsed |