US4715972A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid lubricant additive for gear oils
Assignee: Acheson Industries Inc
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Filing: 1986-04-16
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Granted: 1987-12-29
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Expires: 2006-04-16
Abstract
Abstract A lubricant additive for gear oils and an improved gear oil are disclosed. The additive comprises about 0.01 to about 65 percent, by weight, of solid lubricant particles selected from the group consisting of molybdenum disulfide, graphite, cerium fluoride, zinc oxide, tungsten disulfide, mica, boron nitrate, boron nitride, borax, silver sulfate, cadmium iodide, lead iodide, barium fluoride, tin sulfide, fluorinated carbon, PTFE, intercalated graphite, zinc phosphide, zinc phosphate, and mixtures thereof; combined with about 0.1 to about 25 percent, by weight, of a stabilizing agent consisting of an ethylene-propylene copolymer; and a fluid carrier. The lubricant additive provides the gear oil with improved demulsibility, stability, and compatibility characteristics of the gear oil when contaminated with water.
Inventors
- 👤 Paula J. Pacholke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:21
CPC Classifications
C; C10; C10M; C10M161/00; C10M125/00; C10M125/02; C10M125/10; C10M125/18; C10M125/22; C10M125/24; C10M143/00; C10M143/02; C10M143/04; C10M147/00; C10M147/02; C10M2201/00; C10M2201/04; C10M2201/041; C10M2201/042; C10M2201/06; C10M2201/061; C10M2201/062; C10M2201/065; C10M2201/066; C10M2201/08; C10M2201/081; C10M2201/082; C10M2201/084; C10M2201/085; C10M2201/087; C10M2201/10; C10M2201/102; C10M2201/103; C10M2201/16; C10M2201/18; C10M2205/00; C10M2205/02; C10M2205/022; C10M2205/024; C10M2211/00; C10M2211/06; C10M2213/00; C10M2213/02; C10M2213/06; C10M2213/062; C10N; C10N2040/00; C10N2040/02; C10N2040/04; C10N2040/042; C10N2040/044; C10N2040/046
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
A method for demulsifying contaminant water out of gear oil as determined by ASTM test D-2711 by adding to said gear oil a composition consisting essentially of: about 0.01 percent to about 65 percent by weight of the additive composition of solid lubricant particles selected from the group consisting of molybdenum disulfide, graphite, cerium fluoride, zinc oxide, tungsten disulfide, mica, boron nitrate, boron nitride, borax, silver sulfate, cadmium iodide, lead iodide, barium fluoride, tin sulfide, fluorinated carbon, PTFE, intercalated graphite, zinc phosphide, zinc phosphate, and mixtures thereof; about 0.01 to about 25 percent by weight of the additive composition, of a stabilizing agent consisting essentially of an ethylene-propylene copolymer consisting of approximately equivalent proportions of ethylene and propylene monomers; and a suitable fluid carrier, and demulsifying said contaminant water.
Claim 2
Independent Claim
129 words
A method for demulsifying contaminant water out of gear oil as determined by ASTM test D-2711 by adding to said gear oil a composition consisting essentially of: about 0.01 percent to about 65 percent by weight of the additive composition of solid lubricant particles selected from the group consisting of molybdenum disulfide, graphite, cerium fluoride, zinc oxide, tungsten disulfide, mica, boron nitrate, boron nitride, borax, silver sulfate, cadmium iodide, lead iodide, barium fluoride, tin sulfide, fluorinated carbon, PTFE, intercalated graphite, zinc phosphide, zinc phosphate, and mixtures thereof; about 0.01 to about 25 percent by weight of the additive composition, of a stabilizing agent consisting essentially of an ethylene-propylene copolymer consisting of approximately equivalent proportions of ethylene and propylene monomers; and a suitable fluid carrier, and demulsifying said contaminant water.
References Cited (Backward Citations)
US3300459A
Cited
US3062741A
Cited
US3156420A
Cited
US3384580A
Cited
US3384581A
Cited
US3842009A
Cited
US4136040A
Cited
US4411804A
Cited
US4434064A
Cited
US4417991A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-12-28 | 1991-06-29 | 1991-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-12-28 | 1995-06-29 | 1995-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-12-28 | 1999-06-29 | 1999-12-29 | $7700.00 | Window Closed / Lapsed |