US3540191A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic separator
Assignee: Individual
•
Filing: 1968-01-29
•
Granted: 1970-11-17
•
Expires: 1988-01-29
Abstract
No abstract record available.
Inventors
- 👤 Marc Victor Edgard Herman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:34
CPC Classifications
B; B03; B03C; B03C3/00; B03C3/34; B03C3/74; B03C3/76; B03C3/40; B03C3/41
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1333790A
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US1252104A
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US1791338A
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US1980521A
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US1992113A
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US2195431A
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US2547902A
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US2585777A
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US2698669A
Cited
US2726731A
Cited
US2711224A
Cited
US3158453A
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US3137550A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-16 | 1974-05-18 | 1974-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-16 | 1978-05-18 | 1978-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-16 | 1982-05-18 | 1982-11-17 | $7700.00 | Window Closed / Lapsed |