Patent US2930754A successfully refreshed from Google Patents.
US2930754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of separating hydrocarbons
Assignee: Pan American Refining Corp
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Filing: 1954-07-16
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Granted: 1960-03-29
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Expires: 1974-07-16
Abstract
No abstract record available.
Inventors
- 👤 James M Stuckey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:31
CPC Classifications
B; B01; B01D; B01D71/00; B01D71/06; B01D71/08; B01D71/12; B01D71/14; B01D71/18; B01D61/00; B01D61/36; B01D61/364; B01D61/3641; C; C10; C10G; C10G31/00; C10G31/11
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
A PROCESS WHICH COMPRISES CONTACTING A CHARGE LIQUID HYDROCARBON MIXTURE WITH ONE SIDE OF A THIN PLASTIC MEMBRANE WHICH IS FREE FROM HOLES, WHICH HAS A THICKNESS OF ABOUT .2 TO 5 MILS, AND WHICH IS COMPRISED OF A CARBOXYLIC ACID ESTER OF CELLULOSE IN WHICH AN AVERAGE OF FROM ABOUT 1.8 TO 2.8 OF THE THREE HYDROXYL GROUPS CONTAINED PER CELLULOSE MOLECULE HAVE BEEN ESTERIFIED, THE ESTER GROUPS CONTAINING BETWEEN 2 AND 6 CARBON ATOMS PER ESTER GROUP AND AT LEAST 10% OF THE ESTER GROUPS HAVING MORE THAN 2 CARBON ATOMS PER ESTER GROUP, PERMEATING A PORTION OF THE LIQUID MIXTURE IN CONTACT WITH SAID MEMBRANE THROUGH SAID MEMBRANE, AND REMOVING FROM THE OPPOSITE SIDE OF SAID MEMBRANE A VAPORIZED PERMEATED PORTIN HAVING A COMPOSITION DIFFERENT FROM SAID CHARGE LIQUID HYDROCARBON MIXTURE.
Claim 2
Dependent Claim
134 words
A PROCESS WHICH COMPRISES CONTACTING A CHARGE LIQUID HYDROCARBON MIXTURE WITH ONE SIDE OF A THIN PLASTIC MEMBRANE WHICH IS FREE FROM HOLES, WHICH HAS A THICKNESS OF ABOUT .2 TO 5 MILS, AND WHICH IS COMPRISED OF A CARBOXYLIC ACID ESTER OF CELLULOSE IN WHICH AN AVERAGE OF FROM ABOUT 1.8 TO 2.8 OF THE THREE HYDROXYL GROUPS CONTAINED PER CELLULOSE MOLECULE HAVE BEEN ESTERIFIED, THE ESTER GROUPS CONTAINING BETWEEN 2 AND 6 CARBON ATOMS PER ESTER GROUP AND AT LEAST 10% OF THE ESTER GROUPS HAVING MORE THAN 2 CARBON ATOMS PER ESTER GROUP, PERMEATING A PORTION OF THE LIQUID MIXTURE IN CONTACT WITH SAID MEMBRANE THROUGH SAID MEMBRANE, AND REMOVING FROM THE OPPOSITE SIDE OF SAID MEMBRANE A VAPORIZED PERMEATED PORTIN HAVING A COMPOSITION DIFFERENT FROM SAID CHARGE LIQUID HYDROCARBON MIXTURE.
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) | 1963-03-29 | 1963-09-28 | 1964-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-29 | 1967-09-28 | 1968-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-29 | 1971-09-28 | 1972-03-29 | $7700.00 | Window Closed / Lapsed |