US2873254A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extreme pressure lubricants
Assignee: Pure Oil Co
•
Filing: 1952-08-01
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Granted: 1959-02-10
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Expires: 1972-08-01
Abstract
No abstract record available.
Inventors
- 👤 Wolfram George
- 👤 Manteuffel Allan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:13
CPC Classifications
C; C10; C10M; C10M163/00; C10M135/00; C10M135/02; C10M135/06; C10M159/00; C10M159/12; C10M159/123; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2219/00; C10M2219/02; C10M2219/024; C10M2219/08; C10M2219/082; C10M2219/083; C10M2223/00; C10M2223/12; C10M2223/121; C10N; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
AN EXTREME PRESSURE LUBRICANT ADDITIVE CONSISTING ESSENTIALLY OF (A) 3-5 PARTS BY WEIGHT OF A SULFURIZED ESTER OF TALL OIL ACIDS AND A STRAIGHT CHAIN C1-C5 ALIPHATIC, SATURATED, MONOHYDRIC ALCOHOL, SAID SULFURIZED ESTER CONTAINING 3-10% BY WEIGHT OF SULFUR, AND (B) 1 PART OF WEIGHT OF THE REACTION PRODUCT OF PHOSPHORUS SESQUSULFIDE ADN A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF GLYCERYL TRIOLEATE, ETHYLENE GLYCOL DIOLEATE, PROPYLENE GLYCOL DIOLEATE, BUTYLENE GLYCOL DIOLEATE, AND A LARD OIL CONTAINING A LOW CONTENT HAVING A PHOSPHORUS CONTENT OF 0.6-2.5 WT. PERCENT.
Claim 2
Dependent Claim
88 words
AN EXTREME PRESSURE LUBRICANT ADDITIVE CONSISTING ESSENTIALLY OF (A) 3-5 PARTS BY WEIGHT OF A SULFURIZED ESTER OF TALL OIL ACIDS AND A STRAIGHT CHAIN C1-C5 ALIPHATIC, SATURATED, MONOHYDRIC ALCOHOL, SAID SULFURIZED ESTER CONTAINING 3-10% BY WEIGHT OF SULFUR, AND (B) 1 PART OF WEIGHT OF THE REACTION PRODUCT OF PHOSPHORUS SESQUSULFIDE ADN A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF GLYCERYL TRIOLEATE, ETHYLENE GLYCOL DIOLEATE, PROPYLENE GLYCOL DIOLEATE, BUTYLENE GLYCOL DIOLEATE, AND A LARD OIL CONTAINING A LOW CONTENT HAVING A PHOSPHORUS CONTENT OF 0.6-2.5 WT. PERCENT.
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) | 1962-02-09 | 1962-08-11 | 1963-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-09 | 1966-08-11 | 1967-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-09 | 1970-08-11 | 1971-02-10 | $7700.00 | Window Closed / Lapsed |