Patent US4565665A successfully refreshed from Google Patents.
Patent US3301784A successfully refreshed from Google Patents.
US3301784A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Substituted pyrrolidinones as lubricating oil additives
Assignee: Chevron USA Inc
•
Filing: 1964-11-16
•
Granted: 1967-01-31
•
Expires: 1984-11-16
Abstract
No abstract record available.
Inventors
- 👤 Donald J Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:42
CPC Classifications
C; C07; C07D; C07D207/00; C07D207/02; C07D207/18; C07D207/22; C07D207/24; C07D207/26; C07D207/263; C07D207/267; C10; C10M; C10M1/00; C10M1/08; C10M2205/00; C10M2207/00; C10M2207/28; C10M2207/282; C10M2207/34; C10M2209/00; C10M2209/10; C10M2209/103; C10M2215/00; C10M2215/08; C10M2215/082; C10M2215/22; C10M2215/221; C10M2215/225; C10M2215/226; C10M2215/24; C10M2215/28; C10M2215/30; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/045; C10M2229/00; C10M2229/02; C10M2229/04; C10M2229/05; C10N; C10N2010/00; C10N2010/04; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A LUBRICATING OIL COMPOSITION COMPRISING AN OIL OF LUBRICATING VISCOSITY AND IN AN AMOUNT SUFFICIENT TO PROVIDE DETERGENCY A COMPOUND COMPRISING A MEMBER OF THE GROUP SELECTED FROM MONO- AND BIS-(N-HYDROCARBYL 2-PYRROLIDONONES) HAVING FROM 1 TO 4 ALKYL SUBSTITUENTS SUBSTITUTED IN THE 3- AND 5-POSITIONS, WHEREIN SAID ALKYL GROUPS ARE OF FROM 10 TO 60 CARBON ATOMS, SAID HYDROCARBYL GROUP IS FROM 1 TO 10 CARBON ATOMS AND WHEREIN THE TOTAL NUMBER OF CARBON ATOMS PER PYRROLIDINONE IS IN THE RANGE OF 20 TO 100 CARBON ATOMS.
Claim 2
Dependent Claim
87 words
A LUBRICATING OIL COMPOSITION COMPRISING AN OIL OF LUBRICATING VISCOSITY AND IN AN AMOUNT SUFFICIENT TO PROVIDE DETERGENCY A COMPOUND COMPRISING A MEMBER OF THE GROUP SELECTED FROM MONO- AND BIS-(N-HYDROCARBYL 2-PYRROLIDONONES) HAVING FROM 1 TO 4 ALKYL SUBSTITUENTS SUBSTITUTED IN THE 3- AND 5-POSITIONS, WHEREIN SAID ALKYL GROUPS ARE OF FROM 10 TO 60 CARBON ATOMS, SAID HYDROCARBYL GROUP IS FROM 1 TO 10 CARBON ATOMS AND WHEREIN THE TOTAL NUMBER OF CARBON ATOMS PER PYRROLIDINONE IS IN THE RANGE OF 20 TO 100 CARBON ATOMS.
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) | 1970-01-30 | 1970-08-01 | 1971-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-30 | 1974-08-01 | 1975-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-30 | 1978-08-01 | 1979-01-31 | $7700.00 | Window Closed / Lapsed |