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US3478874A
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Method for separation of tramp oil from oil-in-water emulsions
Assignee: Idreco USA Ltd
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Filing: 1965-03-03
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Granted: 1969-11-18
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Expires: 1985-03-03
Abstract
No abstract record available.
Inventors
- 👤 John O Mclean
- 👤 John R Schneider
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:58
CPC Classifications
B; B01; B01D; B01D17/00; B01D17/02; B01D17/04; B01D17/045; B01D25/00; B01D25/22; B01D25/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1658362A
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US1947709A
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US2522378A
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US2588794A
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US2611490A
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US2551175A
Cited
US2746607A
Cited
US3256997A
Cited
US3265212A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-17 | 1973-05-19 | 1973-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-17 | 1977-05-19 | 1977-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-17 | 1981-05-19 | 1981-11-18 | $7700.00 | Window Closed / Lapsed |