US3925213A
Expired / Lapsed
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Sulfur and phosphorus bearing lubricant
Assignee: OPTIMOL OLWERKE INDUSTRIE GmbH
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Filing: 1974-09-30
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Granted: 1975-12-09
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Expires: 1994-09-30
Abstract
Abstract The performance of lubricants having a mineral oil or synthetic oil base can be improved greatly by dithiophosphates of zinc, lead, tin, tungsten, molybdenum, niobium, lanthanum, antimony, bismuth, chromium, vanadium, or cadmium esterified with alkyl, aryl, or alkyl-aryl groups in synergistic cooperation with additives free from heavy metals, but containing sulfur and phosphorus, such as sulfides of phosphorus and known addition agents.
Inventors
- 👤 Rasmus Froeschmann
- 👤 Friedrich Sprugel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:58
CPC Classifications
C; C10; C10M; C10M141/00; C10M141/10; C10M137/00; C10M163/00; C10M2201/00; C10M2201/06; C10M2201/065; C10M2207/00; C10M2207/28; C10M2207/282; C10M2207/34; C10M2219/00; C10M2219/06; C10M2219/062; C10M2219/066; C10M2219/068; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/045; C10M2223/047; C10M2223/12; C10M2225/00; C10M2225/04; C10N; C10N2010/00; C10N2010/04; C10N2010/06; C10N2010/08; C10N2010/10; C10N2010/12; C10N2010/14; C10N2040/00; C10N2040/02; C10N2040/04; C10N2040/042; C10N2040/044; C10N2040/046; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
57 words
IN A LUBRICANT COMPOSITION INCLUDING A BASE IOL OF MINERAL OR SYNTHETIC ORIGIN ANS A LUBRICATION-IMPROVING ADDITIVE CONTAINING CHEMICALLY BOUND PHOSPHOURS AND SULFUR WHILE FREE FROM CHEMICALLY BOUND HEAVY METAL, THE IMPROVEMENT WHICH COMPRISES: A. A METALORGANIC DITHIOPHOSPHATE IN AN AMOUNT SUFFICIENT TO ENHANCE THE LUBRICATION-IMPROVING EFFET OF SAID ADDITIVE, OR B. SAID DITHIOPHOSPHATE HAVING THE FORMULA
Claim 2
Dependent Claim
57 words
IN A LUBRICANT COMPOSITION INCLUDING A BASE IOL OF MINERAL OR SYNTHETIC ORIGIN ANS A LUBRICATION-IMPROVING ADDITIVE CONTAINING CHEMICALLY BOUND PHOSPHOURS AND SULFUR WHILE FREE FROM CHEMICALLY BOUND HEAVY METAL, THE IMPROVEMENT WHICH COMPRISES: A. A METALORGANIC DITHIOPHOSPHATE IN AN AMOUNT SUFFICIENT TO ENHANCE THE LUBRICATION-IMPROVING EFFET OF SAID ADDITIVE, OR B. SAID DITHIOPHOSPHATE HAVING THE FORMULA
Claim 3
Dependent Claim
26 words
In a composition as set forth in claim 1, the amount of said lubrication-improving additive being between one and six times the weight of said dithiophosphate.
Claim 4
Dependent Claim
21 words
In a composition as set forth in claim 2, said phosphorus being directly bound to said sulfur in said lubricationimproving additive.
Claim 5
Dependent Claim
16 words
In a composition as set forth in claim 2, said lubrication-improving additive being a phosphorus sulfide.
Claim 6
Dependent Claim
32 words
In a composition as set forth in claim 2, the combined amount of said lubrication-improving additive and of said dithiophosphate being between 0.1 and 20% of the weight of said base oil.
Claim 7
Dependent Claim
31 words
In a composition as set forth in claim 2, said lubrication-improving additive being a substance obtained by sulfurization and/or phosphorization of an organic substance containing one or more olefinic double bonds.
Claim 8
Dependent Claim
67 words
In a composition as set forth in claim 1, w being 1, x and y being zero, and z being 3 when Me is lead, bismuth, or lanthanum; w being 1, x and y being zero, and z being 2 when Me is lead, zinc, tin, or cadmium; and each of w, x, y, and z being 2 when Me is molybdenum, tungsten, chromium, vanadium, or niobium.
Claim 9
Dependent Claim
42 words
In a composition as set forth in claim 7, said additive being a member of the group consisting of sulfides and polysulfides of phosphorus, thiophosphates, and products of the sulfurization and phosphorization of organic compounds containing at least one olefinic double bond.
Claim 10
Dependent Claim
32 words
In a composition as set forth in claim 8, the combined amount of said lubrication-improving additive and of said dithiophosphate being between 0.1 and 20% of the weight of said base oil.
Claim 11
Dependent Claim
18 words
In a composition as set forth in claim 9, said metal being antimony, cadmium, lead, molybdenum, or zinc.
Claim 12
Dependent Claim
17 words
In a composition as set forth in claim 10, R1 and R2 being each amyl, octyl, 2-ethylhexyl.
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) | 1978-12-08 | 1979-06-09 | 1979-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-08 | 1983-06-09 | 1983-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-08 | 1987-06-09 | 1987-12-09 | $7700.00 | Window Closed / Lapsed |