US3087893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymers of maleic anhydride and unsaturated esters as additives in oils
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1958-08-11
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Granted: 1963-04-30
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Expires: 1978-08-11
Abstract
No abstract record available.
Inventors
- 👤 Peter J V J Agius
- 👤 Bryan Joan Daphne
- 👤 Thomas A Garbett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:59
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C08; C08F; C08F218/00; C08F218/02; C08F218/04; C08F218/08; C08F22/00; C08F22/04; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/086; C10M2219/00; C10M2219/04; C10M2219/044; C10M2219/08; C10M2219/082; C10M2219/087; C10M2219/088; C10M2219/089; C10N; C10N2040/00; C10N2040/25; C10N2040/251; C10N2040/255; C10N2040/28; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
A COMPOSITION CONSISTING ESSENTIALLY OF AN OIL SELECTED FROM THE GROUP CONSISTING OF FUEL OILS, MINERAL LUBRICATING OILS AND ESTER LUBRICATING OILS AND AN AMOUNT, SUFFICIENT TO IMPROVE THE DETERGENCY, VISCOSITY INDEX, AND POUR POINT PROPERTIES OF THE SAID OIL, OF A POLYMER PREPARED FROM 2 TO 15 MOL PERCENT OF MALEIC ANHYDRIDE, 40 TO 70 MOL PERCENT OF VINYL ACETATE, AND 25 TO 50 MOL PERCENT OF AN ESTER DERIVED FROM A C8 TO C20 ALIPHATIC ALCOHOL AND AN ALPHA, BETA-UNSATURATED DICARBOXYLIC ACID, SAID POLYMER HAVING A STAUDINGER MOLECULAR WEIGHT IN THE RANGE OF 10,000 TO 100,000.
Claim 2
Dependent Claim
98 words
A COMPOSITION CONSISTING ESSENTIALLY OF AN OIL SELECTED FROM THE GROUP CONSISTING OF FUEL OILS, MINERAL LUBRICATING OILS AND ESTER LUBRICATING OILS AND AN AMOUNT, SUFFICIENT TO IMPROVE THE DETERGENCY, VISCOSITY INDEX, AND POUR POINT PROPERTIES OF THE SAID OIL, OF A POLYMER PREPARED FROM 2 TO 15 MOL PERCENT OF MALEIC ANHYDRIDE, 40 TO 70 MOL PERCENT OF VINYL ACETATE, AND 25 TO 50 MOL PERCENT OF AN ESTER DERIVED FROM A C8 TO C20 ALIPHATIC ALCOHOL AND AN ALPHA, BETA-UNSATURATED DICARBOXYLIC ACID, SAID POLYMER HAVING A STAUDINGER MOLECULAR WEIGHT IN THE RANGE OF 10,000 TO 100,000.
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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) | 1966-04-29 | 1966-10-29 | 1967-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-29 | 1970-10-29 | 1971-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-29 | 1974-10-29 | 1975-04-30 | $7700.00 | Window Closed / Lapsed |