US3407930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for the electrostatic sorting of granular materials
Assignee: Machines Electrostatiques SA
•
Filing: 1965-05-19
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Granted: 1968-10-29
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Expires: 1985-05-19
Abstract
No abstract record available.
Inventors
- 👤 Morel Roger Clandius Marius
- 👤 Tauveron Pierre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:02
CPC Classifications
B; B03; B03C; B03C7/00; B03C7/02; B03C7/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2116613A
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US2300324A
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US2805770A
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US2889055A
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US2786635A
Cited
US2889042A
Cited
US2805769A
Cited
SU143744A1
Cited
US3291301A
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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) | 1971-10-29 | 1972-04-29 | 1972-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-29 | 1976-04-29 | 1976-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-29 | 1980-04-29 | 1980-10-29 | $7700.00 | Window Closed / Lapsed |