US3143492A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic separation
Assignee: Simpson Herbert Corp
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Filing: 1961-11-17
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Granted: 1964-08-04
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Expires: 1981-11-17
Abstract
No abstract record available.
Inventors
- 👤 Harry L Bullock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:11
CPC Classifications
B; B03; B03C; B03C7/00; B03C7/02; B03C7/12; B03C7/006; B03C7/06; B03C7/08; B03C7/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
43 words
AN ELECTROSTATIC SEPARATION APPARATUS COMPRISING: A VIBRATABLE MEMBER HAVING A DIELECTRIC SURFACE FOR SUPPORTING AND CHARGING MATERIAL TO BE SEPARATED, MEANS INCLUDNG DOWNWARDLY MOVING PORTINS OF ENDLESS SURFACES OF DIELECTRIC MATERIAL DEFINING A FREE-FALL ELECTROSTATIC SEPARATION ZONE FOR RECEIVING CHARGED MATERIAL FROM SAID
References Cited (Backward Citations)
US1222305A
Cited
DE598948C
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US2225096A
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US2786636A
Cited
US2889042A
Cited
US3012668A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-04 | 1968-02-03 | 1968-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-04 | 1972-02-03 | 1972-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-04 | 1976-02-03 | 1976-08-04 | $7700.00 | Window Closed / Lapsed |