US3477568A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic separation of round and nonround particles
Assignee: Xerox Corp
•
Filing: 1966-11-01
•
Granted: 1969-11-11
•
Expires: 1986-11-01
Abstract
No abstract record available.
Inventors
- 👤 Robert W Madrid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:55
CPC Classifications
B; B03; B03C; B03C7/00; B03C7/02; B03C7/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US714649A
Cited
US1744967A
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US2314939A
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US2638416A
Cited
US3059772A
Cited
US3249225A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-10 | 1973-05-12 | 1973-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-10 | 1977-05-12 | 1977-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-10 | 1981-05-12 | 1981-11-11 | $7700.00 | Window Closed / Lapsed |