US2970106A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aromatic separation process
Assignee: American Oil Co
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Filing: 1958-01-31
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Granted: 1961-01-31
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Expires: 1978-01-31
Abstract
No abstract record available.
Inventors
- 👤 Robert C Binning
- 👤 Jr Walker F Johnston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:06
CPC Classifications
C; C10; C10G; C10G31/00; C10G31/11; Y; Y10; Y10S; Y10S159/00; Y10S159/27
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
A PROCESS WHICH COMPRISES CONTACTING A DISTILLATE CHARGE AROMATICS-CONTAINING HYDROCARBON MIXTURE HAVING A DEFINITE BOILING RANGE WITH ONE SIDE OF A PLASTIC PERMEATION MEMBRANE WHICH PREFERENTIALLY PERMEATES AROMATICS AND NON-AROMATICS SEPARABLE THEREFROM BY DISTILLATION, PERMEATING A PORTION OF THE CHARGE MIXTURE THROUGH SAID MEMBRANCE, SAID PERMEATED PORTION COMPRISING AROMATICS AND REDUCED CONCENTRATION OF CLOSELY BOLING NON-AROMATICS, SEPARTELY RECOVERING PERMEATED AND NONPERMEATED PORTIONS HAVING HIGHER AND LOWER CONCENTRATIONS OF AROMATICS RESPECTIVELY THAN THE CHARGE MIXTURE, AND DISTILLING THE PERMEATED PORTION TO SEPARATE A LOWER BOILING FRACTION FROM A HIGHER BOILING FRACTION WHICH HIGHER BOILING FRACTION HAS A HIGHER CONCENTRATION OF AROMATICS THAN THE PERMEATED PORTION WHICH IS PASSED TO THE DISTILLATION STEP AND A HIGHER CONCENTRATION OF AROMATICS THAN COULD BE OBTAINED BY ONLY DISTILLING THE DISTILLATE CHARGE.
Claim 2
Dependent Claim
127 words
A PROCESS WHICH COMPRISES CONTACTING A DISTILLATE CHARGE AROMATICS-CONTAINING HYDROCARBON MIXTURE HAVING A DEFINITE BOILING RANGE WITH ONE SIDE OF A PLASTIC PERMEATION MEMBRANE WHICH PREFERENTIALLY PERMEATES AROMATICS AND NON-AROMATICS SEPARABLE THEREFROM BY DISTILLATION, PERMEATING A PORTION OF THE CHARGE MIXTURE THROUGH SAID MEMBRANCE, SAID PERMEATED PORTION COMPRISING AROMATICS AND REDUCED CONCENTRATION OF CLOSELY BOLING NON-AROMATICS, SEPARTELY RECOVERING PERMEATED AND NONPERMEATED PORTIONS HAVING HIGHER AND LOWER CONCENTRATIONS OF AROMATICS RESPECTIVELY THAN THE CHARGE MIXTURE, AND DISTILLING THE PERMEATED PORTION TO SEPARATE A LOWER BOILING FRACTION FROM A HIGHER BOILING FRACTION WHICH HIGHER BOILING FRACTION HAS A HIGHER CONCENTRATION OF AROMATICS THAN THE PERMEATED PORTION WHICH IS PASSED TO THE DISTILLATION STEP AND A HIGHER CONCENTRATION OF AROMATICS THAN COULD BE OBTAINED BY ONLY DISTILLING THE DISTILLATE CHARGE.
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) | 1964-01-31 | 1964-08-01 | 1965-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-31 | 1968-08-01 | 1969-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-31 | 1972-08-01 | 1973-01-31 | $7700.00 | Window Closed / Lapsed |