US3394064A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation process using a galvanic couple
Assignee: Shell USA Inc
•
Filing: 1964-09-11
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Granted: 1968-07-23
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Expires: 1984-09-11
Abstract
No abstract record available.
Inventors
- 👤 Frederick M Fowkes
- 👤 Jr Frank W Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:39
CPC Classifications
B; B01; B01D; B01D19/00; B01D19/02; B01D19/04; B01D17/00; B01D17/02; B01D17/04; B01D17/045; B01D17/06
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) | 1971-07-23 | 1972-01-22 | 1972-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-23 | 1976-01-22 | 1976-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-23 | 1980-01-22 | 1980-07-23 | $7700.00 | Window Closed / Lapsed |