Patent US3388977A successfully refreshed from Google Patents.
US3388977A
Expired / Lapsed
US
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Pour point depressant for middle distillates
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1965-01-06
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Granted: 1968-06-18
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Expires: 1985-01-06
Abstract
No abstract record available.
Inventors
- 👤 Herbert G Burkard
- 👤 Edward N Kresge
- 👤 Irwin J Gardner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:09
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/146; C10L1/16; C10L1/1625; C10L1/1633; C10L1/1641; C10L1/1666; C10L1/18; C10L1/192; C10L1/195
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2379728A
Cited
US2387501A
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US2824131A
Cited
GB807737A
Cited
US3048479A
Cited
US3082192A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-18 | 1971-12-18 | 1972-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-18 | 1975-12-18 | 1976-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-18 | 1979-12-18 | 1980-06-18 | $7700.00 | Window Closed / Lapsed |