US3349029A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbon and water recovery
Assignee: PERTOLITE Corp
•
Filing: 1964-07-20
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Granted: 1967-10-24
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Expires: 1984-07-20
Abstract
No abstract record available.
Inventors
- 👤 Cheng Jen-Pu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:31
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/56; C09C1/58; C02; C02F; C02F1/00; C02F1/26; C01; C01P; C01P2004/00; C01P2004/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
AN IMPROVED PROCESS FOR RECOVERING FINELY DIVIDED CARBON PARTICLES FROM AN AQUEOUS MEDIUM SYSTEM CONTAINING FINELY DIVIDED CARBON PARTICLES COMPRISING (1) TREATING SAID FINELY DIVIDED CARBON PARTICLE-CONTAINING AQUEOUS MEDIUM SYSTEM WITH A SUFFICIENT AMOUNT OF A SURFACTANT CAPABLE OF RENDERING SAID CARBON PARTICLES HYDROPHOBIC, (2) CONTACTING SAID SO-RENDERED HYDROPHOBIC CARBON PARTICLES WITH SUFFICIENT WATER INSOLUBLE SOLVENT TO TRANSFORM SAID SO-RENDERED CARBON PARTICLES INTO LARGER DISCRETE CARBON UNITS, AND (3) SEPARATING SAID LARGER DISCRETE CARBON UNITS FROM SAID AQUEOUS MEDIUM SYSTEM, THEREBY PRODUCING WATER CAPABLE OF REUSE.
Claim 2
Dependent Claim
86 words
AN IMPROVED PROCESS FOR RECOVERING FINELY DIVIDED CARBON PARTICLES FROM AN AQUEOUS MEDIUM SYSTEM CONTAINING FINELY DIVIDED CARBON PARTICLES COMPRISING (1) TREATING SAID FINELY DIVIDED CARBON PARTICLE-CONTAINING AQUEOUS MEDIUM SYSTEM WITH A SUFFICIENT AMOUNT OF A SURFACTANT CAPABLE OF RENDERING SAID CARBON PARTICLES HYDROPHOBIC, (2) CONTACTING SAID SO-RENDERED HYDROPHOBIC CARBON PARTICLES WITH SUFFICIENT WATER INSOLUBLE SOLVENT TO TRANSFORM SAID SO-RENDERED CARBON PARTICLES INTO LARGER DISCRETE CARBON UNITS, AND (3) SEPARATING SAID LARGER DISCRETE CARBON UNITS FROM SAID AQUEOUS MEDIUM SYSTEM, THEREBY PRODUCING WATER CAPABLE OF REUSE.
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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) | 1970-10-23 | 1971-04-24 | 1971-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-23 | 1975-04-24 | 1975-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-23 | 1979-04-24 | 1979-10-24 | $7700.00 | Window Closed / Lapsed |