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Patent US4100081A successfully refreshed from Google Patents.
US4100081A
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Polyurea-based extreme pressure grease
Assignee: Chevron USA Inc
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Filing: 1977-03-14
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Granted: 1978-07-11
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Expires: 1997-03-14
Abstract
Abstract Polyurea-based greases containing as an extreme-pressure additive an alkali metal triborate introduced or produced in the grease in aqueous solution.
Inventors
- 👤 John L. Dreher
- 👤 Richard E. Crocker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:30
CPC Classifications
C; C10; C10M; C10M169/00; C10M169/06; C10M2201/00; C10M2201/08; C10M2201/082; C10M2201/083; C10M2201/087; C10M2203/00; C10M2203/02; C10M2203/022; C10M2203/024; C10M2203/04; C10M2203/06; C10M2205/00; C10M2205/02; C10M2205/024; C10M2205/026; C10M2207/00; C10M2207/04; C10M2207/10; C10M2207/12; C10M2207/125; C10M2207/129; C10M2207/28; C10M2207/282; C10M2207/34; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/105; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/042; C10M2215/06; C10M2215/062; C10M2215/064; C10M2215/065; C10M2215/066; C10M2215/08; C10M2215/082; C10M2215/10; C10M2215/102; C10M2215/22; C10M2215/221; C10M2215/225; C10M2215/226; C10M2215/24; C10M2215/26; C10M2215/28; C10M2215/30; C10M2217/00; C10M2217/02; C10M2217/028; C10M2217/04; C10M2217/042; C10M2217/043; C10M2217/044; C10M2217/045; C10M2217/046; C10M2217/06; C10M2219/00; C10M2219/10; C10M2219/102; C10M2219/104; C10M2219/106; C10M2219/108; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/042; C10N; C10N2010/00; C10N2010/04; C10N2010/08; C10N2050/00; C10N2050/10; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
78 words
A grease comprising a major portion of an oil of lubricating viscosity, a minor portion of polyurea, sufficient to thicken said oil to grease consistency, and a minor portion, sufficient to impart extreme-pressure properties to the grease, of a potassium or sodium triborate, said borate being introduced into the grease in aqueous solution, said polyurea comprising a water- and oil-insoluble organic compound having a molecular weight between about 375 and 2500 and having at least one ureido group.
Claim 2
Dependent Claim
78 words
A grease comprising a major portion of an oil of lubricating viscosity, a minor portion of polyurea, sufficient to thicken said oil to grease consistency, and a minor portion, sufficient to impart extreme-pressure properties to the grease, of a potassium or sodium triborate, said borate being introduced into the grease in aqueous solution, said polyurea comprising a water- and oil-insoluble organic compound having a molecular weight between about 375 and 2500 and having at least one ureido group.
Claim 3
Dependent Claim
64 words
The grease of claim 1 in which the borate is produced by reacting in the grease boric acid with an aqueous solution of alkali metal hydroxide in a ratio of about 1 mol of hydroxide to about 1 to 10 mols of boric acid, followed by heating said grease at elevated temperature for a period sufficient to substantially remove the water from the grease.
Claim 4
Dependent Claim
24 words
The grease of claim 1 wherein the grease thickener is present in the amount of about 1% to 50% by weight in the grease.
Claim 5
Dependent Claim
21 words
The grease of claim 3 wherein the grease thickener is present in the amount of about 2% to 7% by weight.
Claim 6
Dependent Claim
12 words
The grease of claim 2 wherein the alkali metal hydroxide is KOH.
Claim 7
Dependent Claim
19 words
The grease of claim 2 wherein the aqueous solution contains from about 5% to 60% of alkali metal hydroxide.
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) | 1981-07-10 | 1982-01-09 | 1982-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-10 | 1986-01-09 | 1986-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-10 | 1990-01-09 | 1990-07-11 | $7700.00 | Window Closed / Lapsed |