US2851422A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic transmission fluid
Assignee: Pure Oil Co
•
Filing: 1952-11-07
•
Granted: 1958-09-09
•
Expires: 1972-11-07
Abstract
No abstract record available.
Inventors
- 👤 Manteuffel Allan
- 👤 Paul R Chapman
- 👤 George R Cook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:29
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; C10M2207/125; C10M2207/129; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2209/10; C10M2209/101; C10M2219/00; C10M2219/02; C10M2219/024; C10M2219/04; C10M2219/044; C10M2219/08; C10M2219/082; C10M2219/087; C10M2219/088; C10M2219/089
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A HIGH VISCOSITY INDEX LUBRICATING OIL COMPOSITION COMPRISING A MINERAL OIL BASE AND SUFFICIENT AMOUNTS OF A HIGH MOLECULAR WEIGHT POLYMERIZED ESTER OF THE ACRYLIC ACID SERIES TO IMPART HIGH VISCOSITY INDEX CHARACTERISTICS TO SAID COMPOSITION, SAID MINERAL OIL BASE COMPRISING A MAJOR PORTION OF A REFINED LUBRICATING OIL STOCK AND A MINOR PORTION OF A SOLVENT EXTRACT OBTAINED FROM THE SOLVENT REFINING OF LUBRICATING OIL STOCKS TO PRODUCE A LUBRICATING OIL HAVING AN IMPROVED VISCOSITY INDEX AND INCREASED RESISTANCE TO OXIDATION IN AN AMOUNT SUFFICIENT TO ENHANCE THE LOW TEMPERATURE FLUIDITY IMPROVING CHARACTERISTICS OF SAID HIGH MOLECULAR WEIGHT POLYMER AS INDICATED BY THE G.M. LOW TEMPERATURE FLUIDITY TEST.
Claim 2
Dependent Claim
109 words
A HIGH VISCOSITY INDEX LUBRICATING OIL COMPOSITION COMPRISING A MINERAL OIL BASE AND SUFFICIENT AMOUNTS OF A HIGH MOLECULAR WEIGHT POLYMERIZED ESTER OF THE ACRYLIC ACID SERIES TO IMPART HIGH VISCOSITY INDEX CHARACTERISTICS TO SAID COMPOSITION, SAID MINERAL OIL BASE COMPRISING A MAJOR PORTION OF A REFINED LUBRICATING OIL STOCK AND A MINOR PORTION OF A SOLVENT EXTRACT OBTAINED FROM THE SOLVENT REFINING OF LUBRICATING OIL STOCKS TO PRODUCE A LUBRICATING OIL HAVING AN IMPROVED VISCOSITY INDEX AND INCREASED RESISTANCE TO OXIDATION IN AN AMOUNT SUFFICIENT TO ENHANCE THE LOW TEMPERATURE FLUIDITY IMPROVING CHARACTERISTICS OF SAID HIGH MOLECULAR WEIGHT POLYMER AS INDICATED BY THE G.M. LOW TEMPERATURE FLUIDITY TEST.
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) | 1961-09-08 | 1962-03-10 | 1962-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-08 | 1966-03-10 | 1966-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-08 | 1970-03-10 | 1970-09-09 | $7700.00 | Window Closed / Lapsed |