Patent US3798164A successfully refreshed from Google Patents.
US3798164A
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Polyoxyalkylene bis-thiourea extreme pressure agents and methods of use
Assignee: Richardson Co
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Filing: 1972-09-14
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Granted: 1974-03-19
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Expires: 1992-09-14
Abstract
Abstract NOVEL SUBSTITUTED AND UNSUBSTITUTED POLYOXYALKYLENE BIS-THIOUREAS HAVING THE FORMULA: R-NH-C(=S)-NH-CH(-Y)-CH2-(O-CH2-CH(-Y))X-NH-C(=S)-NH-R WHEREIN X IS A NUMBER FROM 1 TO 10, R AND R1 ARE SELECTED FROM THE GROUP CONSISTING OF HYDROGEN, ALKYL AND ALKENYL, Y IS HYDROGEN OR LOWER ALKYL, ARE USEFUL AS EXTREME PRESSURE LUBRICANTS IN METAL WORKING FLUIDS AND PARTICULARLY IN AQUEOUS TYPE FLUIDS. COMPOSITIONS COMPRISING THE THIOUREAS AND A BOUNDARY LUBRICANT PROVIDE THE ANTI-WELD AND FRICTION REDUCTION PROPERTIES NECESSARY FOR HEAVY DUTY MACHINING.
Inventors
- 👤 T Kmet
- 👤 J Loboda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:03
CPC Classifications
C; C07; C07C; C07C335/00; C07C335/04; C07C335/06; C07C335/08; C10; C10M; C10M173/00; C10M173/02; C10M2201/00; C10M2201/02; C10M2205/00; C10M2205/18; C10M2207/00; C10M2207/02; C10M2207/021; C10M2207/022; C10M2207/023; C10M2207/027; C10M2207/04; C10M2207/046; C10M2207/10; C10M2207/12; C10M2207/125; C10M2207/129; C10M2207/18; C10M2207/20; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/284; C10M2207/285; C10M2207/286; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/104; C10M2209/107; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/042; C10M2215/22; C10M2215/221; C10M2215/225; C10M2215/226; C10M2215/24; C10M2215/30; C10M2219/00; C10M2219/04; C10M2219/042; C10M2219/044; C10M2219/06; C10M2219/062; C10M2219/064; C10M2221/00; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10N; C10N2010/00; C10N2010/02; C10N2040/00; C10N2040/20; C10N2040/22; C10N2040/24; C10N2040/241; C10N2040/242; C10N2040/243; C10N2040/244; C10N2040/245; C10N2040/246; C10N2040/247; C10N2050/00; C10N2050/01
Claims Analysis
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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) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |