US3435625A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for the continuous separation of solid materials contained in a liquid
Assignee: IFP Energies nouvelles
•
Filing: 1967-03-20
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Granted: 1969-04-01
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Expires: 1987-03-20
Abstract
No abstract record available.
Inventors
- 👤 Herbert F Wiegandt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:20
CPC Classifications
B; B01; B01D; B01D9/00; B01D9/0004; B01D9/0009; B01D11/00; B01D11/02; B01D9/0036; B01D9/004; B01D9/005; C; C07; C07C; C07C7/00; C07C7/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1028304A
Cited
US3049889A
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US3160490A
Cited
US3070969A
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US3148143A
Cited
US3290891A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-31 | 1972-09-30 | 1973-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-31 | 1976-09-30 | 1977-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-31 | 1980-09-30 | 1981-04-01 | $7700.00 | Window Closed / Lapsed |