Patent US3567639A successfully refreshed from Google Patents.
US3567639A
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US
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Hydrocarbon-containing compositions
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1967-05-08
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Granted: 1971-03-02
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Expires: 1987-05-08
Abstract
Abstract A POUR POINT DEPRESSANT FOR CRUDE OIL, SHALE OIL OR A FUEL OIL WHICH COMPRISES 35-100 WT. PERCENT OF RESIDUA FROM THE DISTILLATION OF CRUDE OR SHALE OIL IS DISCOLOSED. THE POUR POINT DEPRESSANT IS A COPOLYMER OF EHTYLENE AND A VINYL OR C1 TO C30 HYDROCARBYL SUBSTITUTED VINYL ESTER OF A C1 TO C30 SATURATED ALIPHATIC MONOCARBOXYLIC ACID, SAID COPOLYMER HAVING A NUMBER AVERAGE MOLECULAR WEIGHT OF ABOUT 4,000 TO 60,000 AND CONTAINING ABOUT 40 TO 95 WT. PERCENT ETHYLENE.
Inventors
- 👤 Colin Aaron
- 👤 Alan Harold Edwards
- 👤 Keith Campbell Tessier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:44
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/18; C10L1/192; C10L1/195; C10L1/197; C10L1/1973; C08; C08L; C08L31/00; C08L31/02; C08L31/04; C08L91/00; C10L1/16; C10L1/1625; C10L1/1633; C10L1/1641; C10L1/165; C10L1/20; C10L1/206; C10L1/207; C10L1/22; C10L1/234; C10L1/236
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |