US3598552A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pour depressants for middle distillates
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1968-12-13
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Granted: 1971-08-10
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Expires: 1988-12-13
Abstract
Abstract PETROLEUM MIDDLE DISTILLATE FUEL OIL CONTAINING AS A POUR POINT DESPRESSANT A POLYMER OF ETHYLENE AND C10 TO C22 ALPHA MONOOLEFIN, SAID POLYMER HAVING A MOLECULAR WEIGHT OF ABOUT 1,000 TO 50,000.
Inventors
- 👤 Charles A Cohen
- 👤 Herbert G Burkard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:09
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/16; C10L1/1625; C10L1/1633; C10L1/1641
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) | 1974-08-09 | 1975-02-08 | 1975-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-09 | 1979-02-08 | 1979-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-09 | 1983-02-08 | 1983-08-10 | $7700.00 | Window Closed / Lapsed |