US3309415A
Expired / Lapsed
US
⏱️ 0.0 years remaining
n-paraffin separation process
Assignee: Shell USA Inc
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Filing: 1964-01-27
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Granted: 1967-03-14
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Expires: 1984-01-27
Abstract
No abstract record available.
Inventors
- 👤 Eldred E Young
- 👤 George C Blytas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:23
CPC Classifications
C; C10; C10G; C10G25/00; C10G25/02; C10G25/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
IN A VAPOR PHASE PROCESS FOR THE RECOVERY OF NORMAL C11-C15 PARAFFIN FROM A KEROSENE FRACTION FEED BY PERIODIC CONTACT OF THE FEED WITH A MOLECULAR SIEVE TO EFFECT ADSORPTION OF THE NORMALS FOLLOWED BY DESORPTION OF THE NORMALS BY CONTACT WITH N-OCTANE, THE IMPROVEMENT WHICH COMPRISES EFFECTING SAID ABSORPTION AND DESORPTION AT SUBSTANTIALLY THE SAME TEMPERATURE AND WHEREIN SAID TEMPERATURE IS AT LEAST 40*C. ABOVE THE DEW POINT TEMPERATURE OF THE FEED.
Claim 2
Dependent Claim
73 words
IN A VAPOR PHASE PROCESS FOR THE RECOVERY OF NORMAL C11-C15 PARAFFIN FROM A KEROSENE FRACTION FEED BY PERIODIC CONTACT OF THE FEED WITH A MOLECULAR SIEVE TO EFFECT ADSORPTION OF THE NORMALS FOLLOWED BY DESORPTION OF THE NORMALS BY CONTACT WITH N-OCTANE, THE IMPROVEMENT WHICH COMPRISES EFFECTING SAID ABSORPTION AND DESORPTION AT SUBSTANTIALLY THE SAME TEMPERATURE AND WHEREIN SAID TEMPERATURE IS AT LEAST 40*C. ABOVE THE DEW POINT TEMPERATURE OF THE FEED.
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) | 1970-03-13 | 1970-09-12 | 1971-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-13 | 1974-09-12 | 1975-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-13 | 1978-09-12 | 1979-03-14 | $7700.00 | Window Closed / Lapsed |