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Patent US4200542A successfully refreshed from Google Patents.
US4200542A
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Grease composition
Assignee: Mobil Oil AS
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Filing: 1979-01-24
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Granted: 1980-04-29
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Expires: 1999-01-24
Abstract
Abstract Grease compositions containing nitrites and amines form N-nitrosamines, which are suppressed by the addition to such compositions of a combination of metal ascorbate or metal isoascorbate with alpha tocopherol.
Inventors
- 👤 Michael Sedlak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:46
CPC Classifications
C; C10; C10M; C10M141/00; C10M141/06; C10M2201/00; C10M2201/06; C10M2201/062; C10M2201/063; C10M2201/065; C10M2201/066; C10M2201/08; C10M2201/082; C10M2201/083; C10M2201/10; C10M2201/102; C10M2201/103; C10M2201/105; C10M2201/14; C10M2205/00; C10M2205/02; C10M2205/024; C10M2205/028; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/025; C10M2207/04; C10M2207/044; C10M2207/10; C10M2207/12; C10M2207/121; C10M2207/122; C10M2207/124; C10M2207/125; C10M2207/129; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2207/34; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/105; C10M2211/00; C10M2211/02; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/06; C10M2215/064; C10M2215/065; C10M2215/086; C10M2215/10; C10M2215/102; C10M2215/22; C10M2215/221; C10M2215/225; C10M2215/226; C10M2215/227; C10M2215/24; C10M2215/26; C10M2215/28; C10M2215/30; C10M2227/00; C10M2227/08; C10M2227/081; C10M2229/00; C10M2229/02; C10M2229/04; C10M2229/05; C10N; C10N2010/00; C10N2010/02; C10N2010/04
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
38 words
A lubricating grease formulation comprising a lubricating vehicle, thickener, sodium nitrite, an amine and an amount of a combination of (1) metal ascorbate or metal isoascorbate with (2) an alpha tocopherol sufficient to inhibit the formation of N-nitrosamines.
Claim 2
Dependent Claim
38 words
A lubricating grease formulation comprising a lubricating vehicle, thickener, sodium nitrite, an amine and an amount of a combination of (1) metal ascorbate or metal isoascorbate with (2) an alpha tocopherol sufficient to inhibit the formation of N-nitrosamines.
Claim 3
Dependent Claim
19 words
The grease of claim 1 wherein the metal is from group IA or Group IIA of the Periodic Table.
Claim 4
Dependent Claim
12 words
The grease of claim 2 wherein the metal is from group IA.
Claim 5
Dependent Claim
10 words
The grease of claim 3 wherein the metal is soidum.
Claim 6
Dependent Claim
35 words
The grease of claim 1 wherein the amine has the formula R--Ar--NH--Ar' wherein R is C 1 -C 10 hydrocarbyl group and Ar and Ar' are aromatic groups containing from 6 to 14 carbon atoms.
Claim 7
Dependent Claim
16 words
The grease of claim 5 containing about 0.5 to about 3.0% by weight of the amine.
Claim 8
Dependent Claim
16 words
The grease of claim 6 containing about 0.5 to about 3.0% by weight of sodium nitrite.
Claim 9
Dependent Claim
24 words
The grease of claim 7 containing from about 0.1 to about 1.0 equivalent of sodium ascorbate and alpha tocopherol per equivalent of sodium nitrite.
Claim 10
Dependent Claim
24 words
The grease of claim 7 containing from about 0.1 to about 1.0 equivalent of sodium isoascorbate and alpha tocopherol per equivalent of sodium nitrite.
Claim 11
Dependent Claim
13 words
The grease of claim 1 wherein the lubricating vehicle is a mineral oil.
Claim 12
Dependent Claim
14 words
The grease of claim 1 wherein the lubricating vehicle is a synthetic hydrocarbon 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) | 1983-04-29 | 1983-10-29 | 1984-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-29 | 1987-10-29 | 1988-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-29 | 1991-10-29 | 1992-04-29 | $7700.00 | Window Closed / Lapsed |