US2850455A
Expired / Lapsed
US
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Lubricating oil compositions and additives for lubricating oils
Assignee: Rhein Chemie Rheinau GmbH
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Filing: 1954-07-06
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Granted: 1958-09-02
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Expires: 1974-07-06
Abstract
No abstract record available.
Inventors
- 👤 Kern Rudolf
- 👤 Scheurer Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:12
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2207/00; C10M2207/02; C10M2207/021; C10M2207/023; C10M2207/026; C10M2207/04; C10M2207/046; C10M2207/10; C10M2207/16; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/104; C10M2209/105; C10M2215/00; C10M2215/02; C10M2215/06; C10M2219/00; C10M2219/04; C10M2219/042; C10M2219/044; C10M2219/08; C10M2219/082; C10M2219/086; C10M2219/10; C10M2219/104; C10M2219/108; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/042; C10M2223/045; C10M2223/047; C10M2223/12; C10M2225/00; C10M2225/04; C10N; C10N2010/00; C10N2010/02; C10N2010/04; C10N2010/06; C10N2010/08; C10N2010/10; C10N2010/12; C10N2010/14; C10N2010/16; C10N2040/00; C10N2040/25; C10N2040/252; C10N2040/253
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
65 words
A NEW PRODUCT CONSISTING ESSENTIALLY OF A HYDROCARBON LUBRICATING OIL HAVING DISSOLVED THEREIN AT LEAST ONE METAL SALT OF A SURFACE ACTIVE SULPHONIC ACID OF AT LEAST 8 CARBON ATOMS AND AT LEAST ONE SALT OF A NAPHTHENIC ACID IN AN AMOUNT SUFFICIENT TO PREVENT DEPOSITION OF RESINS, ASPHALTS AND CARBON IN THE OIL, AT LEAST ONE POLYALKYLENE GLYCOL DERIVATIVE HAVING THE FOLLOWING GENERAL FORMULA:
References Cited (Backward Citations)
US2565403A
Cited
GB676625A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-01 | 1962-03-03 | 1962-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-01 | 1966-03-03 | 1966-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-01 | 1970-03-03 | 1970-09-02 | $7700.00 | Window Closed / Lapsed |