Patent US3639644A successfully refreshed from Google Patents.
US3639644A
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Colloidal asbestos polyethylene grease
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1969-03-19
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Granted: 1972-02-01
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Expires: 1989-03-19
Abstract
Abstract A LUBRICATING GREASE COMPRISING A MAJOR AMOUNT OF LUBRICATING OIL, ABOUT 3.0 TO 20.0 WT. PERCENT OF A POLYETHYLENE OF A NUMBER AVERAGE MOLECULAR WEIGHT OF 10,000 TO 50,000 AND ABOUT 1 TO 25.0 WT. PERCENT OF COLLOIDAL ASBESTOS ESHIBITS A MARKEDLY LONG LUBRICATION LIFE AND EXCELLENT STRUCTURAL STABILITY. A PARTICULARLY SUITABLE POLYETHYLENE IS ONE HAVING A NUMBER AVERAGE MOLECULAR WEIGHT OF BETWEEN 14,000 AND 18,000. THE COLLOIDAL ASBESTOS IS DISTINGUISHED OVER ART-KNOWN ASBESTOS BY NATURALLY OCCURRING EXTREMELY SMALL TUBULAR FIBERS.
Inventors
- 👤 Arnold J Morway
- 👤 Albert J Bodner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:13
CPC Classifications
C; C10; C10M; C10M5/00; C10M2201/00; C10M2201/08; C10M2201/082; C10M2201/083; C10M2201/10; C10M2201/102; C10M2205/00; C10M2205/02; C10M2205/022; C10M2205/14; C10M2207/00; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2207/287; C10M2207/289; C10M2207/34; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/104; C10M2209/105; C10M2209/11; C10M2209/111; C10M2209/112; C10M2211/00; C10M2211/06; C10M2213/00; C10M2213/02; C10M2213/06; C10M2213/062; C10M2215/00; C10M2215/02; C10M2215/06; C10M2215/064; C10M2215/065; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/042; C10M2227/00; C10M2227/02; C10M2229/00; C10M2229/04; C10M2229/041; C10M2229/043; C10M2229/044; C10N; C10N2050/00; C10N2050/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-31 | 1975-08-02 | 1976-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-31 | 1979-08-02 | 1980-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-31 | 1983-08-02 | 1984-02-01 | $7700.00 | Window Closed / Lapsed |