Patent US3210282A successfully refreshed from Google Patents.
US3210282A
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Copolymer concentrate and oil composition
Assignee: Dow Chemical Co
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Filing: 1961-10-25
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Granted: 1965-10-05
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Expires: 1981-10-25
Abstract
No abstract record available.
Inventors
- 👤 Charles R Bearden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:36
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2215/00; C10M2215/02; C10M2215/06; C10M2215/064; C10M2217/00; C10M2217/02; C10M2217/028; C10M2217/06; C10M2219/00; C10M2219/06; C10M2219/062; C10M2219/066; C10M2219/068; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/045; C10N; C10N2010/00; C10N2010/04; C10N2040/00; C10N2040/25; C10N2040/251; C10N2040/255; C10N2040/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
36 words
A HYDROCARBON LUBRICATING OIL HAVING DISSOLVED THEREIN, IN AN AMOUNT TO IMPROVE THE VISCOSITY INDEX THEREOF, A COPOLYMER OF (A) 3 TO 30 PERCENT OF N-VINYL-3-MORPHOLINONE AND (B) AT LEAST ONE ACRYLIC ESTER HAVING THE FORMULA
Claim 2
Dependent Claim
36 words
A HYDROCARBON LUBRICATING OIL HAVING DISSOLVED THEREIN, IN AN AMOUNT TO IMPROVE THE VISCOSITY INDEX THEREOF, A COPOLYMER OF (A) 3 TO 30 PERCENT OF N-VINYL-3-MORPHOLINONE AND (B) AT LEAST ONE ACRYLIC ESTER HAVING THE FORMULA
References Cited (Backward Citations)
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US2892788A
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US2889282A
Cited
US2987509A
Cited
US3003845A
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US2949445A
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US3052648A
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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) | 1968-10-04 | 1969-04-05 | 1969-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-04 | 1973-04-05 | 1973-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-04 | 1977-04-05 | 1977-10-05 | $7700.00 | Window Closed / Lapsed |