US3244763A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semi-permeable membrane extraction
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1960-12-29
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Granted: 1966-04-05
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Expires: 1980-12-29
Abstract
No abstract record available.
Inventors
- 👤 Robert P Cahn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:46
CPC Classifications
B; B01; B01D; B01D11/00; B01D11/04; B01D11/0415; B01D61/00; B01D61/38; C; C07; C07C; C07C7/00; C07C7/144
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
A PROCESS FOR CONTINUOUSLY REMOVING A COMPONENT FROM A MIXTURE CONTAINING SAID COMPONENT WHICH COMPRISES CONTINUOUSLY PASSING SAID MIXTURE OVER ONE SIDE OF A POROUS, ABSORBENT BARRIER CONTAINING ABSORBED SOLVENT SELECTIVE TO SAID COMPONENT, SAID SOLVENT BEING IMMISCIBLE WITH SAID MIXTURE, WHILE CONTINUOUSLY PASSING OVER THE OTHER SIDE OF SAID POROUS, ABSORBENT BARRIER A FLUID CAPABLE OF LEACHING SAID DESIRED COMPONENT FROM SAID SOLVENT, SAID FLUID BEING IMMISCIBLE WITH SAID SOLVENT, AND MAINTAINING SUFFICIENT SOLVENT ABSORBED IN THE BARRIER TO PREVENT DIRECT CONTACT BETWEEN THE MIXTURE ON ONE SIDE AND THE LEACHING FLUID ON THE OTHER.
Claim 2
Dependent Claim
96 words
A PROCESS FOR CONTINUOUSLY REMOVING A COMPONENT FROM A MIXTURE CONTAINING SAID COMPONENT WHICH COMPRISES CONTINUOUSLY PASSING SAID MIXTURE OVER ONE SIDE OF A POROUS, ABSORBENT BARRIER CONTAINING ABSORBED SOLVENT SELECTIVE TO SAID COMPONENT, SAID SOLVENT BEING IMMISCIBLE WITH SAID MIXTURE, WHILE CONTINUOUSLY PASSING OVER THE OTHER SIDE OF SAID POROUS, ABSORBENT BARRIER A FLUID CAPABLE OF LEACHING SAID DESIRED COMPONENT FROM SAID SOLVENT, SAID FLUID BEING IMMISCIBLE WITH SAID SOLVENT, AND MAINTAINING SUFFICIENT SOLVENT ABSORBED IN THE BARRIER TO PREVENT DIRECT CONTACT BETWEEN THE MIXTURE ON ONE SIDE AND THE LEACHING FLUID ON THE OTHER.
References Cited (Backward Citations)
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US2509885A
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US2736756A
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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) | 1969-04-04 | 1969-10-04 | 1970-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-04 | 1973-10-04 | 1974-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-04 | 1977-10-04 | 1978-04-05 | $7700.00 | Window Closed / Lapsed |