US2954334A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High vi lubricating oil and process for preparing same
Assignee: Phillips Petroleum Co
•
Filing: 1957-02-25
•
Granted: 1960-09-27
•
Expires: 1977-02-25
Abstract
No abstract record available.
Inventors
- 👤 Charles E Stoops
- 👤 James M Day
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:23
CPC Classifications
C; C08; C08F; C08F289/00; B; B01; B01J; B01J19/00; B01J19/08; B01J19/081; C08F10/00; Y; Y10; Y10S; Y10S204/00; Y10S204/902; Y10S204/907
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
A PROCESS FOR TREATING A PETROLEUM LUBRICATING OIL WHICH COMPRISES ADMIXING SAID OIL WITH AN OLEFIN HAVING 2 TO 5 CARBON ATOMS IN A RATIO OF 1-2000 PARTS OF SAID OLEFIN PER 100 PARTS OF SAID OIL, AND EXPOSING THE SAID ADMIXTURE TO A TOTAL DOSAGE OF IONIZING RADIATION OF 5X10**6 T3 5X10**9 REP UNITS, AND THEREBY FORMING AN OIL HAVING A HIGHER VISCOSITY INDEX THAN THE ORIGINAL LUBRICATING OIL, THE SAID OIL HAVING A HIGHER VISCOSITY INDEX BEING A PRODUCT OF REACTION OF SAID PETROLEUM LUBRICATING OIL WITH SAID OLEFIN.
Claim 2
Dependent Claim
91 words
A PROCESS FOR TREATING A PETROLEUM LUBRICATING OIL WHICH COMPRISES ADMIXING SAID OIL WITH AN OLEFIN HAVING 2 TO 5 CARBON ATOMS IN A RATIO OF 1-2000 PARTS OF SAID OLEFIN PER 100 PARTS OF SAID OIL, AND EXPOSING THE SAID ADMIXTURE TO A TOTAL DOSAGE OF IONIZING RADIATION OF 5X10**6 T3 5X10**9 REP UNITS, AND THEREBY FORMING AN OIL HAVING A HIGHER VISCOSITY INDEX THAN THE ORIGINAL LUBRICATING OIL, THE SAID OIL HAVING A HIGHER VISCOSITY INDEX BEING A PRODUCT OF REACTION OF SAID PETROLEUM LUBRICATING OIL WITH SAID OLEFIN.
References Cited (Backward Citations)
US2082203A
Cited
US2350330A
Cited
GB697601A
Cited
GB708901A
Cited
US2516848A
Cited
US2743223A
Cited
US2627938A
Cited
US2692258A
Cited
US2692259A
Cited
US2746925A
Cited
US2691647A
Cited
US2710854A
Cited
US2741649A
Cited
GB784624A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-27 | 1964-03-28 | 1964-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-27 | 1968-03-28 | 1968-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-27 | 1972-03-28 | 1972-09-27 | $7700.00 | Window Closed / Lapsed |