US2628940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extreme pressure lubricant
Assignee: Standard Oil Development Co
•
Filing: 1949-02-03
•
Granted: 1953-02-17
•
Expires: 1969-02-03
Abstract
No abstract record available.
Inventors
- 👤 Elmer B Cyphers
- 👤 Walter E Waddey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:33
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2219/00; C10M2219/02; C10M2219/022; C10M2219/024; C10M2223/00; C10M2223/08; C10M2223/12; C10M2223/121
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
A LUBRICATING OIL ADDITIVE MATERIAL HAVING THE CHARACTERISTIC OF IMPARTING DESIRABLE EXTREME PRESSURE PROPERTIES TO A LUBRICATING OIL WITH WHICH IT IS BLENDED CONSISTING OF ABOUT 50% BY WEIGHT OF A REACTION PRODUCT OF A CHLORINATED WAX-KEROSENE MIXTURE WITH SODIUM POLYSULFIDE, ABOUT 30% BY WEIGHT OF A P4S3-TREATED SULFURIZED METHYLATED ROSIN, AND ABOUT 20% BY WEIGHT OF A P4S3-TREATED SULFURIZED SPERM OIL.
Claim 2
Dependent Claim
62 words
A LUBRICATING OIL ADDITIVE MATERIAL HAVING THE CHARACTERISTIC OF IMPARTING DESIRABLE EXTREME PRESSURE PROPERTIES TO A LUBRICATING OIL WITH WHICH IT IS BLENDED CONSISTING OF ABOUT 50% BY WEIGHT OF A REACTION PRODUCT OF A CHLORINATED WAX-KEROSENE MIXTURE WITH SODIUM POLYSULFIDE, ABOUT 30% BY WEIGHT OF A P4S3-TREATED SULFURIZED METHYLATED ROSIN, AND ABOUT 20% BY WEIGHT OF A P4S3-TREATED SULFURIZED SPERM OIL.
References Cited (Backward Citations)
US2124598A
Cited
US2424204A
Cited
US2442134A
Cited
US2392468A
Cited
US2415837A
Cited
US2488618A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-02-17 | 1956-08-18 | 1957-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-02-17 | 1960-08-18 | 1961-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-02-17 | 1964-08-18 | 1965-02-17 | $7700.00 | Window Closed / Lapsed |