US2500163A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthetic lubricants
Assignee: ExxonMobil Oil Corp
•
Filing: 1948-10-29
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Granted: 1950-03-14
•
Expires: 1968-10-29
Abstract
No abstract record available.
Inventors
- 👤 William E Garwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:52
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/02; C07C2/04; C07C2/06; C07C2/08; C07C2/14; C07C2/16; C07C2527/00; C07C2527/02; C07C2527/04; C07C2527/14; Y; Y10; Y10S; Y10S208/00; Y10S208/95
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
THE METHOD OF PREPARATION OF A VISCOUS OIL, WHICH COMPRISES: POLYMERIZING, AT A TEMPERATURE ABOVE 600*F. AND BELOW 750*F., A NORMAL, ALPHA MONO-OLEFIN HAVING FROM 5 TO 18 CARBON ATOMS WITH A MATERIAL SELECTED FROM THE GROUP CONSISTING OF A PHOSPHORUS SULFIDE, ELEMENTAL PHOSPHORUS WITH ELEMENTAL SULFUR, AND MIXTURES THEREOF, THE QUANTITY OF SAID MATERIAL BEING LESS THAN ONE PER CENT BY WEIGHT OF THE COMBINED WEIGHT OF SAID OLEFIN AND SAID MATERIAL.
Claim 2
Independent Claim
73 words
THE METHOD OF PREPARATION OF A VISCOUS OIL, WHICH COMPRISES: POLYMERIZING, AT A TEMPERATURE ABOVE 600*F. AND BELOW 750*F., A NORMAL, ALPHA MONO-OLEFIN HAVING FROM 5 TO 18 CARBON ATOMS WITH A MATERIAL SELECTED FROM THE GROUP CONSISTING OF A PHOSPHORUS SULFIDE, ELEMENTAL PHOSPHORUS WITH ELEMENTAL SULFUR, AND MIXTURES THEREOF, THE QUANTITY OF SAID MATERIAL BEING LESS THAN ONE PER CENT BY WEIGHT OF THE COMBINED WEIGHT OF SAID OLEFIN AND SAID MATERIAL.
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) | 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 |