Patent US3216940A successfully refreshed from Google Patents.
US3216940A
Expired / Lapsed
US
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Polymeric compositions and lubricants containing them
Assignee: California Research LLC
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Filing: 1962-12-18
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Granted: 1965-11-09
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Expires: 1982-12-18
Abstract
No abstract record available.
Inventors
- 👤 Frank A Stuart
- 👤 William T Stewart
- 👤 Lowe Warren
- 👤 Frank W Kavanagh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:21
CPC Classifications
C; C10; C10M; C10M149/00; C10M149/02; C08; C08F; C08F8/00; C08F8/30; C08F8/32; C10M151/00; C10M151/02; C08F220/00; C08F220/02; C08F220/10; C08F220/26; C08F220/32; C08F220/325; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/28; C10M2207/282; C10M2207/34; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2209/10; C10M2209/103; C10M2209/104; C10M2209/105; C10M2209/108; C10M2209/109; C10M2211/00; C10M2211/06; C10M2213/00; C10M2213/02; C10M2213/06; C10M2213/062; C10M2217/00; C10M2217/04; C10M2217/042; C10M2217/043; C10M2221/00; C10M2221/02; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/045; C10M2223/12; C10M2225/00; C10M2225/02; C10M2225/04; C10M2227/00; C10M2227/02; C10N; C10N2010/00; C10N2010/04; C10N2030/00; C10N2030/08; C10N2040/00; C10N2040/12; C10N2040/13; C10N2040/25; C10N2040/251; C10N2040/255; C10N2040/28; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
155 words
A LUBRICANT COMPOSITION COMPRISING A MAJOR PORTION OF AN OIL OF LUBRICATING VISCOSITY AND A MINOR PORTION SUFFICIENT TO ENHANCE THE DETERGENT CHARACTERISTICS OF THE COMPOSITION OF AN OIL-SOLUBLE COPOLYMER OF (A) AT LEAST ONE ALKYL METHACRYLATE HAVING 4 TO 30 CARBON ATOMS IN THE ALKYL GROUP, (B) GLYCIDYL METHACRYLATE, THE EPOXY RING OF SAID GLYCIDYL PORTION OF THE POLYMER BEING REACTED WITH N-2-AMINOETHYLPIPERAZINE, THE MOLAR RATIO OF THE GLYCIDYL PORTION TO DIAMINE BEING APPROXIMATELY 1:1, AND (C) POLYETHYLENE GLYCOL MONOMETHACRYLATE OF POLYETHYLENE GLYCOLS HAVING A MOLECULAR WEIGHT BETWEEN ABOUT 220 AND 30,000 AND CONTAINING AT LEAST 5 ETHYLENE GLYCOL UNITS, SAID COPOLYMER CONTAINING FROM ABOUT 40 TO ABOUT 96% BY WEIGHT OF HYDROCARBON OIL-SOLUBILIZING GROUPS FROM SAID (A) COMPONENT, FROM ABOUT 0.05 TO 8.0% BY WEIGHT OF NITROGEN, FROM ABOUT 4 TO ABOUT 60% BY WEIGHT OF POLYGLYCOL GROUPS FROM THE (C) COMPONENT, AND HAVING A TOTAL MOLECULAR WEIGHT OF AT LEAST ABOUT 2,000.
Claim 2
Dependent Claim
155 words
A LUBRICANT COMPOSITION COMPRISING A MAJOR PORTION OF AN OIL OF LUBRICATING VISCOSITY AND A MINOR PORTION SUFFICIENT TO ENHANCE THE DETERGENT CHARACTERISTICS OF THE COMPOSITION OF AN OIL-SOLUBLE COPOLYMER OF (A) AT LEAST ONE ALKYL METHACRYLATE HAVING 4 TO 30 CARBON ATOMS IN THE ALKYL GROUP, (B) GLYCIDYL METHACRYLATE, THE EPOXY RING OF SAID GLYCIDYL PORTION OF THE POLYMER BEING REACTED WITH N-2-AMINOETHYLPIPERAZINE, THE MOLAR RATIO OF THE GLYCIDYL PORTION TO DIAMINE BEING APPROXIMATELY 1:1, AND (C) POLYETHYLENE GLYCOL MONOMETHACRYLATE OF POLYETHYLENE GLYCOLS HAVING A MOLECULAR WEIGHT BETWEEN ABOUT 220 AND 30,000 AND CONTAINING AT LEAST 5 ETHYLENE GLYCOL UNITS, SAID COPOLYMER CONTAINING FROM ABOUT 40 TO ABOUT 96% BY WEIGHT OF HYDROCARBON OIL-SOLUBILIZING GROUPS FROM SAID (A) COMPONENT, FROM ABOUT 0.05 TO 8.0% BY WEIGHT OF NITROGEN, FROM ABOUT 4 TO ABOUT 60% BY WEIGHT OF POLYGLYCOL GROUPS FROM THE (C) COMPONENT, AND HAVING A TOTAL MOLECULAR WEIGHT OF AT LEAST ABOUT 2,000.
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) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |