Patent US5438485A successfully refreshed from Google Patents.
US2500244A
Expired / Lapsed
US
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Polymerization of alpha olefins
Assignee: ExxonMobil Oil Corp
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Filing: 1949-04-21
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Granted: 1950-03-14
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Expires: 1969-04-21
Abstract
No abstract record available.
Inventors
- 👤 Harry G Doherty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:16
CPC Classifications
C; C07; C07C; C07C2/00; Y; Y10; Y10S; Y10S585/00; Y10S585/949; Y10S585/952
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
THE METHOD FOR PREPARING A VISCOUS OIL FROM A NORMAL, ALPHA MONO-OLEFIN HAVING FROM ABOUT SIX TO ABOUT FOURTEEN CARBON ATOMS PER MOLECULE, WHICH COMPRISES: THERMALLY AND NON-CATALYTICALLY HEATING A HYDROCARBON CHARGE CONSISTING ESSENTIALLY OF SAID OLEFIN IN THE PRESENCE OF A MINOR AND EFFECTIVE AMOUNT OF A CYCLIC HYDROCARBON, AT A TEMPERATURE GREATER THAN ABOUT 700*F. FOR A PERIOD OF TIME FROM ABOUT ONE HOUR TO ABOUT THREE HOURS, AND LESS THAN ABOUT 900*F. FOR A PERIOD OF TIME FROM ABOUT ONE-HALF HOUR TO ABOUT ONE-QUARTER HOUR.
Claim 2
Independent Claim
88 words
THE METHOD FOR PREPARING A VISCOUS OIL FROM A NORMAL, ALPHA MONO-OLEFIN HAVING FROM ABOUT SIX TO ABOUT FOURTEEN CARBON ATOMS PER MOLECULE, WHICH COMPRISES: THERMALLY AND NON-CATALYTICALLY HEATING A HYDROCARBON CHARGE CONSISTING ESSENTIALLY OF SAID OLEFIN IN THE PRESENCE OF A MINOR AND EFFECTIVE AMOUNT OF A CYCLIC HYDROCARBON, AT A TEMPERATURE GREATER THAN ABOUT 700*F. FOR A PERIOD OF TIME FROM ABOUT ONE HOUR TO ABOUT THREE HOURS, AND LESS THAN ABOUT 900*F. FOR A PERIOD OF TIME FROM ABOUT ONE-HALF HOUR TO ABOUT ONE-QUARTER HOUR.
References Cited (Backward Citations)
US2450451A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-13 | 1953-09-12 | 1954-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-13 | 1957-09-12 | 1958-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-13 | 1961-09-12 | 1962-03-14 | $7700.00 | Window Closed / Lapsed |