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US3647906A Expired / Lapsed US ⏱️ 0.0 years remaining

Alpha-olefin production

Assignee: Shell USA Inc
•
Filing: 1970-05-11
•
Granted: 1972-03-07
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Expires: 1990-05-11
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Abstract

Abstract ETHYLENE IS CONVERTED TO LINEAR A-OLEFINS OF A SELECTED RANGE OF CARBON ATOMS BY (1) OLIGOMERIZING ETHYLENE TO LINEAR A-OLEFINS, (2) SEPARATING THE LINEAR A-OLEFINS INTO A LOWER A-OLEFIN FRACTION OF THE SELECTED RANGE OF CARBON ATOMS AND A HIGHER A-OLEFIN FRACTION, (3) RECOVERING THE LOWER A-OLEFIN FRACTION AS PRODUCT, (4) ISOMERIZING THE HIGHER A-OLEFIN FRACTION TO INTERNAL OLEFINS, (5) DISPROPORTIONATING THE INTERNAL OLEFINS WITH EXCESS ETHYLENE TO PRODUCE ADDITIONAL LOWER A-OLEFINS WHICH ARE RECYCLED TO PRODUCE ADDITIONAL LOWER A-OLEFINS WHICH ARE RECYCLED TO STEP 2 FOR SEPARATION. BY A PRFERRED MODIFICATION OF THE PROCESS ETHYLENE IS CONVERTED TO AN A-OLEFIN PRODUCT MIXTURE OF A CONTROLLED MOLECULAR WEIGHT RANGE AND FREE OF LOWER OLIGOMERS, E.G., DIMERS, TRIMERS, ETC.

Inventors

  • 👤 Francis F Farley

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-26 06:27
CPC Classifications
C; C07; C07C; C07C11/00; C07C11/02

Claims Analysis

Total Claims: 0
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References Cited (Backward Citations)

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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) 1975-03-07 1975-09-06 1976-03-07 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-03-07 1979-09-06 1980-03-07 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-03-07 1983-09-06 1984-03-07 $7700.00 Window Closed / Lapsed

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