US3246629A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for developing electrostatic images
Assignee: AB Dick Co
•
Filing: 1963-06-18
•
Granted: 1966-04-19
•
Expires: 1983-06-18
Abstract
No abstract record available.
Inventors
- 👤 Loren E Shelffo
- 👤 John A Harmon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:03
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/08; G03G15/09; G03G15/0921; G03G15/0928
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
67 words
AN APPLICATOR APPARATUS FOR APPLYING DEVELOPER MIX TO AN ELECTROSTATICALLY CHARGED SHEET COMPRISING A ROTATABLE HOLLOW CYLINDRICAL TUBE OF NONMAGNETIC MATERIAL, A STATIONARY MAGNET DISPOSED WITHIN SAID HOLLOW TUBE, AND A STRATUM OF IRREGULARLY SHAPED PARTICLES BONDED TO THE OUTER SURFACE OF SAID HOLLOW TUBE, SAID STRATUM HAVING AN AVERAGE THICKNESS OF 300 MICRONS AND SAID PARTICLES BEING IN THE SIZE RANGE FROM 20 TO 500 MICRONS.
References Cited (Backward Citations)
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GB330323A
Cited
US2062317A
Cited
US3003462A
Cited
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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) | 1969-04-18 | 1969-10-18 | 1970-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-18 | 1973-10-18 | 1974-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-18 | 1977-10-18 | 1978-04-19 | $7700.00 | Window Closed / Lapsed |