US3478494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vortex-electrostatic separator
Assignee: General Electric Co
•
Filing: 1968-06-26
•
Granted: 1969-11-18
•
Expires: 1988-06-26
Abstract
No abstract record available.
Inventors
- 👤 Edward L Lustenader
- 👤 Frank W Van Luik Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:14
CPC Classifications
B; B03; B03C; B03C3/00; B03C3/02; B03C3/04; B03C3/14; B03C3/15; B04; B04C; B04C9/00; B04C2009/001; Y; Y10; Y10S; Y10S55/00; Y10S55/38
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB190711625A
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US895729A
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US887893A
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DE858837C
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US2594805A
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GB698874A
Cited
GB711304A
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US2667942A
Cited
GB729612A
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US3258895A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-17 | 1973-05-19 | 1973-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-17 | 1977-05-19 | 1977-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-17 | 1981-05-19 | 1981-11-18 | $7700.00 | Window Closed / Lapsed |