US4228020A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating oil composition
Assignee: Edwin Cooper Inc
•
Filing: 1979-05-04
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Granted: 1980-10-14
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Expires: 1999-05-04
Abstract
Abstract Friction of internal combustion engines is reduced by using a crankcase motor oil containing the combination of graphite and a di-lower alkyl hydrocarbyl phosphonate, e.g. dimethyloctadecylphosphonate.
Inventors
- 👤 Andrew G. Papay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:07
CPC Classifications
C; C10; C10M; C10M141/00; C10M141/10; C10M125/00; C10M125/02; C10M137/00; C10M137/12; C10M2201/00; C10M2201/04; C10M2201/041; C10M2201/042; C10M2203/00; C10M2203/06; C10M2205/00; C10M2205/02; C10M2205/028; C10M2205/06; C10M2207/00; C10M2207/28; C10M2207/282; C10M2207/283; C10M2207/287; C10M2207/289; C10M2207/30; C10M2207/34; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/086; C10M2215/24; C10M2215/26; C10M2215/28; C10M2217/00; C10M2217/04; C10M2217/042; C10M2217/043; C10M2217/046; C10M2217/06; C10M2219/00; C10M2219/04; C10M2219/044; C10M2219/046; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/045; C10M2223/06; C10M2223/061; C10M2223/065; C10M2225/00; C10M2225/04; C10M2225/041; C10M2227/00; C10M2227/06; C10M2227/061; C10N; C10N2010/00; C10N2010/04; C10N2040/00; C10N2040/25
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
42 words
A lubricating composition suitable for use in the crankcase of an internal combustion engine, said composition comprising a major amount of a lubricating oil and a minor friction-reducing amount of the combination of graphite and a di-lower alkyl C 6-36 hydrocarbyl phosphonate.
Claim 2
Dependent Claim
42 words
A lubricating composition suitable for use in the crankcase of an internal combustion engine, said composition comprising a major amount of a lubricating oil and a minor friction-reducing amount of the combination of graphite and a di-lower alkyl C 6-36 hydrocarbyl phosphonate.
Claim 3
Dependent Claim
17 words
A lubricating composition of claim 1 wherein said phosphonate is a dimethyl C 12-36 aliphatic hydrocarbyl phosphonate.
Claim 4
Dependent Claim
15 words
A lubricating composition of claim 2 wherein said phosphonate is a dimethyl C 12-36 alkylphosphonate.
Claim 5
Dependent Claim
11 words
A lubricating composition of claim 3 wherein said phosphonate is dimethyloctadecylphosphonate.
References Cited (Backward Citations)
US4094799A
Cited
US4158633A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-10-14 | 1984-04-14 | 1984-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-14 | 1988-04-14 | 1988-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-14 | 1992-04-14 | 1992-10-14 | $7700.00 | Window Closed / Lapsed |