Patent US3352936A successfully refreshed from Google Patents.
US3352936A
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US
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Separation process
Assignee: Shell USA Inc
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Filing: 1964-09-30
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Granted: 1967-11-14
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Expires: 1984-09-30
Abstract
No abstract record available.
Inventors
- 👤 Robert S Slott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:16
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/04; G01N30/16; C; C07; C07C; C07C7/00; C07C7/148; C07C7/14833; C07C7/1485; G01N30/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A PROCESS FOR THE RECOVERY OF OLEFINS FROM A FIRST HYDROCARBON FEED STREAM CONTAINING OLEFINS COMPRISING: (1) INTRODUCING SAID FEED STREAM INTO A SOLUTION OF MERCURIC SALT THEREBY SELECTIVELY RETAINING OLEFINS UNRETAINED PORTION OF SAID FIRST FEED STREAM; AND (2) SUBSEQUENTLY INTRODUCING INTO SAID SOLUTION A SEDCOND STREAM CONTAINING AN EXCHANGE OLEFIN WHICH DIFFERS FROM THE OLEFINS CONTAINED IN THE FIRST FEED BY AT LEAST TWO CARBON ATOMS, WHEREBY SAID EXCHANGE OLEFIN DISPLACES OLEFINS RETAINED FROM SAID FIRST FEED STREAM BY SAID SOLUTION AND RECOVERING SAID OLEFINS FROM SAID FIRST FEED STREAM.
Claim 2
Dependent Claim
92 words
A PROCESS FOR THE RECOVERY OF OLEFINS FROM A FIRST HYDROCARBON FEED STREAM CONTAINING OLEFINS COMPRISING: (1) INTRODUCING SAID FEED STREAM INTO A SOLUTION OF MERCURIC SALT THEREBY SELECTIVELY RETAINING OLEFINS UNRETAINED PORTION OF SAID FIRST FEED STREAM; AND (2) SUBSEQUENTLY INTRODUCING INTO SAID SOLUTION A SEDCOND STREAM CONTAINING AN EXCHANGE OLEFIN WHICH DIFFERS FROM THE OLEFINS CONTAINED IN THE FIRST FEED BY AT LEAST TWO CARBON ATOMS, WHEREBY SAID EXCHANGE OLEFIN DISPLACES OLEFINS RETAINED FROM SAID FIRST FEED STREAM BY SAID SOLUTION AND RECOVERING SAID OLEFINS FROM SAID FIRST FEED STREAM.
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) | 1970-11-13 | 1971-05-15 | 1971-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-13 | 1975-05-15 | 1975-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-13 | 1979-05-15 | 1979-11-14 | $7700.00 | Window Closed / Lapsed |