US3259243A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silicon carbide recovery
Assignee: Arthur D Little Inc
•
Filing: 1963-06-28
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Granted: 1966-07-05
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Expires: 1983-06-28
Abstract
No abstract record available.
Inventors
- 👤 William I Watson
- 👤 Paul W Glaser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:19
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/006; B03D2201/00; B03D2201/02; B03D2203/00; B03D2203/02; B03D2203/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
METHOD OF RECOVERING SILICON CARBIDE FROM A WATERSOLIDS SLURRY, COMPRISING THE STEPS OF (A) ADDING TO A WATER SLURRY CONTAINING SILICON CARBIDE PARTICLES, GRANITE DUST AND IRON CHIPS, A FROTHING AGENT AND AN ORGANIC COLLECTOR CAPABLE OF SELECTIVELY COATING SAID SILICON CARBIDE PARTIELES THEREBY TO IMPART HYDROPHOBIC CHARACTERISTICS TO THEIR SURFACES; (B) ADDING TO THE RESULTING CONDITITIONED SLURRY SUFFICIENT WATER TO ADJUST THE SOLIDS CONTENT TO BETWEEN 20 AND 30%; (C) EXTENDING THE RESULTING DILUTED WATER-SOLIDS SLURRY WITH A GAS THEREBY TO FORM A FORTH HAVING ESSENTIALLY ONLY SILICON CARBIDE PARTICLES SUSPENDED THEREIN; (D) SEPARATING SAID FROTH CONTAINING SAID SILICON CARBIDE FROM THE REMAINING LIQUID; AND (E) REMOVING SAID SILICON CARBIDE PARTICLES FROM SAID FROTH.
Claim 2
Dependent Claim
115 words
METHOD OF RECOVERING SILICON CARBIDE FROM A WATERSOLIDS SLURRY, COMPRISING THE STEPS OF (A) ADDING TO A WATER SLURRY CONTAINING SILICON CARBIDE PARTICLES, GRANITE DUST AND IRON CHIPS, A FROTHING AGENT AND AN ORGANIC COLLECTOR CAPABLE OF SELECTIVELY COATING SAID SILICON CARBIDE PARTIELES THEREBY TO IMPART HYDROPHOBIC CHARACTERISTICS TO THEIR SURFACES; (B) ADDING TO THE RESULTING CONDITITIONED SLURRY SUFFICIENT WATER TO ADJUST THE SOLIDS CONTENT TO BETWEEN 20 AND 30%; (C) EXTENDING THE RESULTING DILUTED WATER-SOLIDS SLURRY WITH A GAS THEREBY TO FORM A FORTH HAVING ESSENTIALLY ONLY SILICON CARBIDE PARTICLES SUSPENDED THEREIN; (D) SEPARATING SAID FROTH CONTAINING SAID SILICON CARBIDE FROM THE REMAINING LIQUID; AND (E) REMOVING SAID SILICON CARBIDE PARTICLES FROM SAID FROTH.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-04 | 1970-01-03 | 1970-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-04 | 1974-01-03 | 1974-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-04 | 1978-01-03 | 1978-07-05 | $7700.00 | Window Closed / Lapsed |