Patent US3399765A successfully refreshed from Google Patents.
US3399765A
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Oil phase separation
Assignee: National Research Council Canada
•
Filing: 1964-04-06
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Granted: 1968-09-03
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Expires: 1984-04-06
Abstract
No abstract record available.
Inventors
- 👤 Ira E Puddington
- 👤 Farnand Joseph Redmond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:21
CPC Classifications
C; C10; C10C; C10C3/00; C10C3/007; C10G; C10G1/00; C10G1/002; C10G1/04; C10G1/047
Claims Analysis
Total Claims: 0
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US3153625A
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US3252662A
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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) | 1971-09-03 | 1972-03-04 | 1972-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-03 | 1976-03-04 | 1976-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-03 | 1980-03-04 | 1980-09-03 | $7700.00 | Window Closed / Lapsed |