Patent US3341309A successfully refreshed from Google Patents.
US3341309A
Expired / Lapsed
US
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Terpolymer pour point depressant and method of manufacture
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1966-03-11
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Granted: 1967-09-12
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Expires: 1986-03-11
Abstract
No abstract record available.
Inventors
- 👤 Ilnyckyj Stephan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:25
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/18; C10L1/192; C10L1/195; C10L1/197; C10L1/1973; C08; C08F; C08F10/00; C10L1/196; C10L1/1966
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
A HYDROCARBON COMPOSITION HAVING IMPROVED POUR CHARACTERISTICS WHICH COMPRISES A MAJOR PROPORTION OF A PETROLEUM DISTILLATE FUEL BOILING WITHIN THE RANGE BETWEEN ABOUT 250*F. AND 750*F. AND A POUR DEPRESSING EFFECTIVE AMOUNT OF AN OIL SOLUBLE TERPOLYMER CONSISTING ESSENTIALLY OF FROM ABOUT 30 TO 85 WT. PERCENT OF ETHYLENE, FROM ABOUT 10 TO 40 WT. PERCENT OF AN OLEFINICALLY UNSATURATED C3-C5 MONOCARBOXYLIC ESTER AND FROM ABOUT 5 TO 30 WT. PERCENT OF AN ESTER OF ETHYLENEDICARBOXYLIC ACID AND A C1-C24 MONOHYDRIC ALCOHOL; SAID TERPOLYMER HAVING A MOLECULAR WEIGHT IN THE RANGE OF FROM ABOUT 1,000 TO 4,000.
Claim 2
Dependent Claim
97 words
A HYDROCARBON COMPOSITION HAVING IMPROVED POUR CHARACTERISTICS WHICH COMPRISES A MAJOR PROPORTION OF A PETROLEUM DISTILLATE FUEL BOILING WITHIN THE RANGE BETWEEN ABOUT 250*F. AND 750*F. AND A POUR DEPRESSING EFFECTIVE AMOUNT OF AN OIL SOLUBLE TERPOLYMER CONSISTING ESSENTIALLY OF FROM ABOUT 30 TO 85 WT. PERCENT OF ETHYLENE, FROM ABOUT 10 TO 40 WT. PERCENT OF AN OLEFINICALLY UNSATURATED C3-C5 MONOCARBOXYLIC ESTER AND FROM ABOUT 5 TO 30 WT. PERCENT OF AN ESTER OF ETHYLENEDICARBOXYLIC ACID AND A C1-C24 MONOHYDRIC ALCOHOL; SAID TERPOLYMER HAVING A MOLECULAR WEIGHT IN THE RANGE OF FROM ABOUT 1,000 TO 4,000.
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) | 1970-09-11 | 1971-03-13 | 1971-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-11 | 1975-03-13 | 1975-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-11 | 1979-03-13 | 1979-09-12 | $7700.00 | Window Closed / Lapsed |