US2720491A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extreme pressure lubricant
Assignee: Standard Oil Co
•
Filing: 1954-06-28
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Granted: 1955-10-11
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Expires: 1974-06-28
Abstract
No abstract record available.
Inventors
- 👤 Beretvas Helen Sellei
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:02
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2203/00; C10M2203/10; C10M2203/102; C10M2203/104; C10M2203/106; C10M2203/108; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/10; C10M2207/12; C10M2207/121; C10M2207/123; C10M2207/124; C10M2207/125; C10M2207/129; C10M2207/16; C10M2207/18; C10M2207/22; C10M2211/00; C10M2211/02; C10M2211/022; C10M2211/06; C10M2211/08; C10M2219/00; C10M2219/02; C10M2219/022; C10M2219/024; C10M2219/08; C10M2219/082; C10M2225/00; C10M2225/04; C10M2225/041; C10N; C10N2010/00; C10N2010/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
A NORMALLY LIQUID EXTREME PRESSURE LUBRICANT COMPRISING A MINERAL LUBRICATING OIL AND A MINOR AMOUNT OF A COMPLEX DOUBLE SOAP HAVING THE GENERAL FORMULA RCOOPBOOCR'' WHEREIN R REPRESENTS A NAPHTHENIC ACID RADICAL AND R'' REPRESENTS THE ACYCLIC RADICAL OF A CARBOXYLIC ACID CONTAINING FROM 2 ABOUT 6 CARBON ATOMS WHICH CARBOXYLIC ACID IS SELECTED FROM THE GROUP CONSISTING OF UNSATURATED CARBOXYLIC ACIDS AND HYDROXY CARBOXYLIC ACIDS.
Claim 2
Dependent Claim
66 words
A NORMALLY LIQUID EXTREME PRESSURE LUBRICANT COMPRISING A MINERAL LUBRICATING OIL AND A MINOR AMOUNT OF A COMPLEX DOUBLE SOAP HAVING THE GENERAL FORMULA RCOOPBOOCR'' WHEREIN R REPRESENTS A NAPHTHENIC ACID RADICAL AND R'' REPRESENTS THE ACYCLIC RADICAL OF A CARBOXYLIC ACID CONTAINING FROM 2 ABOUT 6 CARBON ATOMS WHICH CARBOXYLIC ACID IS SELECTED FROM THE GROUP CONSISTING OF UNSATURATED CARBOXYLIC ACIDS AND HYDROXY CARBOXYLIC ACIDS.
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) | 1958-10-10 | 1959-04-11 | 1959-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-10 | 1963-04-11 | 1963-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-10 | 1967-04-11 | 1967-10-11 | $7700.00 | Window Closed / Lapsed |