Patent US4123369A successfully refreshed from Google Patents.
US4123369A
Expired / Lapsed
US
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Lubricating oil composition
Assignee: ConocoPhillips Co
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Filing: 1976-12-01
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Granted: 1978-10-31
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Expires: 1996-12-01
Abstract
Abstract An extended service crankcase lubricating oil composition comprising a base oil and an additive package including a combination of alkaline earth metal sulfonate and alkaline earth metal phosphonate-phenate sulfide. This combination provides enhanced rust inhibition.
Inventors
- 👤 Edsel L. Miller
- 👤 Robert A. Krenowicz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:35
CPC Classifications
C; C10; C10M; C10M163/00; C10M159/00; C10M159/12; C10M159/20; C10M159/24; C10M2219/00; C10M2219/04; C10M2219/044; C10M2219/046; C10M2219/08; C10M2219/082; C10M2219/087; C10M2219/088; C10M2219/089; C10M2221/00; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/045; C10M2223/06; C10M2223/065; C10N; C10N2010/00; C10N2010/04; C10N2040/00; C10N2040/25; C10N2040/251; C10N2040/255; C10N2040/28
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
72 words
In a crankcase lubricating oil composition consisting of a base oil and an additive package, the improvement wherein the composition contains from 0.2 to 1.2 percent by weight active ingredient of overbased magnesium sulfonate having a base number of about 400 and from 0.2 to 2.0 percent by weight active ingredient of slightly overbased calcium phosphonate-phenate sulfide, and the ratio of magnesium sulfonate to calcium phosphonate-phenate sulfide is from 0.5:1 to 1.5:1.
Claim 2
Dependent Claim
72 words
In a crankcase lubricating oil composition consisting of a base oil and an additive package, the improvement wherein the composition contains from 0.2 to 1.2 percent by weight active ingredient of overbased magnesium sulfonate having a base number of about 400 and from 0.2 to 2.0 percent by weight active ingredient of slightly overbased calcium phosphonate-phenate sulfide, and the ratio of magnesium sulfonate to calcium phosphonate-phenate sulfide is from 0.5:1 to 1.5:1.
Claim 3
Dependent Claim
23 words
The composition of claim 1 wherein from 20 to 40 percent of the phenol hydroxy groups of said calcium phosphonate-phenate sulfide are phosphonated.
Claim 4
Dependent Claim
23 words
The composition of claim 1 wherein the composition contains 0.45 percent by weight magnesium sulfonate and 0.9 percent by weight calcium phosphonate-phenate sulfide.
Claim 5
Dependent Claim
16 words
The composition of claim 1 wherein the base oil is a solvent refined neutral base oil.
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) | 1981-10-30 | 1982-05-01 | 1982-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-30 | 1986-05-01 | 1986-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-30 | 1990-05-01 | 1990-10-31 | $7700.00 | Window Closed / Lapsed |