Patent US3389979A successfully refreshed from Google Patents.
US3389979A
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US
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Middle distillate flow improver
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1964-06-03
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Granted: 1968-06-25
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Expires: 1984-06-03
Abstract
No abstract record available.
Inventors
- 👤 Darrell W Brownawell
- 👤 Vincent P Catto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:08
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/143; C10L1/16; C10L1/1691; C10L1/18; C10L1/192; C10L1/195; C10L1/197; C10L1/1973
Claims Analysis
Total Claims: 0
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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) | 1971-06-25 | 1971-12-25 | 1972-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-25 | 1975-12-25 | 1976-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-25 | 1979-12-25 | 1980-06-25 | $7700.00 | Window Closed / Lapsed |