US2540580A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quality of olefin polymer lubricants
Assignee: Standard Oil Development Co
•
Filing: 1947-09-11
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Granted: 1951-02-06
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Expires: 1967-09-11
Abstract
No abstract record available.
Inventors
- 👤 Raymond L Heinrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:18
CPC Classifications
C; C10; C10M; C10M177/00; C10M109/00; C10M109/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A METHOD OF PRODUCING AN IMPROVED LUBRICATING OIL WHICH INCLUDES THE STEPS OF CONTACTING A MIXTURE OF AN ALPHA OLEFIN HAVING A BOILING POINT OF LESS THAN 450* F. AND A MATERIAL SELECTED FROM THE GROUP CONSISTING OF PHOSPHORUS AND PHOSPHORUS PENTASULFIDE WITH A FRIEDEL-CRAFTS TYPE CATALYST IN THE PRESENCE OF A DILUENT AT A TEMPERATURE IN THE RANGE BETWEEN 50* AND 250* F. IN THE LIQUID PHASE FOR A TIME IN THE RANGE BETWEEN 1 AND 3 HOURS SUFFICIENT FOR THE SIMULTANEOUS POLYMERIZATION OF THE SAID OLEFIN AND FOR THE REACTION OF THE SAID OLEFIN AND ITS POLYMERS WITH THE SAID MATERIAL TO FORM A PRODUCT SUITABLE FOR USE AS A LUBRICATING OIL AND RECOVERING SAID PRODUCT.
Claim 2
Independent Claim
118 words
A METHOD OF PRODUCING AN IMPROVED LUBRICATING OIL WHICH INCLUDES THE STEPS OF CONTACTING A MIXTURE OF AN ALPHA OLEFIN HAVING A BOILING POINT OF LESS THAN 450* F. AND A MATERIAL SELECTED FROM THE GROUP CONSISTING OF PHOSPHORUS AND PHOSPHORUS PENTASULFIDE WITH A FRIEDEL-CRAFTS TYPE CATALYST IN THE PRESENCE OF A DILUENT AT A TEMPERATURE IN THE RANGE BETWEEN 50* AND 250* F. IN THE LIQUID PHASE FOR A TIME IN THE RANGE BETWEEN 1 AND 3 HOURS SUFFICIENT FOR THE SIMULTANEOUS POLYMERIZATION OF THE SAID OLEFIN AND FOR THE REACTION OF THE SAID OLEFIN AND ITS POLYMERS WITH THE SAID MATERIAL TO FORM A PRODUCT SUITABLE FOR USE AS A LUBRICATING OIL AND RECOVERING SAID PRODUCT.
References Cited (Backward Citations)
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Cited
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Cited
US2389240A
Cited
US2381907A
Cited
US2316080A
Cited
US2360699A
Cited
US2449934A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-05 | 1954-08-07 | 1955-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-05 | 1958-08-07 | 1959-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-05 | 1962-08-07 | 1963-02-06 | $7700.00 | Window Closed / Lapsed |