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Patent US3674532A successfully refreshed from Google Patents.
US3674532A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control for bias of magnetic brush and method
Assignee: Eastman Kodak Co
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Filing: 1970-07-23
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Granted: 1972-07-04
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Expires: 1990-07-23
Abstract
Abstract IMPROVED DEVELOPEMENT OF ELECTROSTATIC CHARGE PATTERNS IS ACHIEVED BY THE USE OF THE DEVELOPMENT CONTROL DEVICE DISCLOSED WHICH ELECTRICALLY BIASES A MAGNETIC BRUSH DURING DEVELOPMENT TO A VOLTAGE INITIALLY SENSED BY THE BRUSH.
Inventors
- 👤 Theodore H Morse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:15
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/065
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |