US3057801A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating oil compositions containing viscosity index improving agents
Assignee: Individual
•
Filing: 1960-06-06
•
Granted: 1962-10-09
•
Expires: 1980-06-06
Abstract
No abstract record available.
Inventors
- 👤 Donovan R Wilgus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:35
CPC Classifications
C; C07; C07C; C07C15/00; C07C15/12; C10; C10M; C10M1/00; C10M1/08; C10M2203/00; C10M2203/02; C10M2203/022; C10M2203/024; C10M2203/04; C10M2203/06; C10M2203/10; C10M2205/00; C10M2205/02; C10M2205/024; C10M2205/026; C10M2205/22; C10M2207/00; C10M2207/04; C10M2207/28; C10M2207/282; C10M2207/34; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/105; C10M2209/108; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/042; C10M2227/00; C10M2227/02; C10M2229/00; C10M2229/04; C10M2229/041; C10M2229/043; C10M2229/044; C10M2229/045; C10M2229/046; C10M2229/047; C10M2229/048
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
30 words
A LUBRICATING OIL COMPOSITION COMPRISING A MAJOR PROPORTION OF AN OIL OF LUBRICATING VISCOSITY AND, IN AN AMOUNT SUFFICIENT TO IMPROVE THE VISCOSITY INDEX THEREOF, AN AGENT OF THE FORMULA:
Claim 2
Dependent Claim
30 words
A LUBRICATING OIL COMPOSITION COMPRISING A MAJOR PROPORTION OF AN OIL OF LUBRICATING VISCOSITY AND, IN AN AMOUNT SUFFICIENT TO IMPROVE THE VISCOSITY INDEX THEREOF, AN AGENT OF THE FORMULA:
References Cited (Backward Citations)
US2231248A
Cited
US2548982A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-08 | 1966-04-09 | 1966-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-08 | 1970-04-09 | 1970-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-08 | 1974-04-09 | 1974-10-09 | $7700.00 | Window Closed / Lapsed |