US2618552A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Development of electrophotographic images
Assignee: Battelle Development Corp
•
Filing: 1947-07-18
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Granted: 1952-11-18
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Expires: 1967-07-18
Abstract
No abstract record available.
Inventors
- 👤 Edward N Wise
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:22
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/10; G03G15/00; G03G15/06; G03G15/08; G03G15/0801; Y; Y10; Y10S; Y10S101/00; Y10S101/37
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
152 words
A METHOD OF PRODUCING A POWDER IMAGE ON AN ELECTRICALLY CHARGED IMAGE CONSISTING OF TRANSPORTING WITHIN THE ATTRACTION RANGE OF THE CHARGED IMAGE PARTICLES OF INSULATED ATTRACTABLE PIGMENTED POWDER OF A SIZE IN THE ORDER OF .10 TO 20 MICRONS HELD ON SUBSTANTIALLY EQUIDIMENSIONAL LARGER GRANULAR CARRIER PARTICLES BY ATTRACTION, SAID CARRIER PARTICLES BEING OF A SIZE IN THE ORDER OF 30 TO 60 MESH AND HAVING LESS ATTRACTION FOR THE PIGMENTED PARTICLES THAN HAS THE CHARGED IMAGE, ROLLING SAID CARRIER PARTICLES COVERED BY INSULATED PIGMENTED PARTICLES OVER THE IMAGE TO PRESENT THE PIGMENTED PARTICLES HELD ON THE SORFACES OF THE CARRIER PARTICLES TO THE CHARGED IMAGE, THE PIGMENTED PARTICLES BEING ATTRACTED FROM THE CARRIER PARTICLES TO THE CHARGED IMAGE, AND REMOVING THE CARRIER PARTICLES LESS THAN IMAGE ADHERING PIGMENTED PARTICLES FROM THE SURFACE OF THE CHARGED IMAGE TO THEREBY PRODUCE A POWDER IMAGE SUPERIMPOSED ON AND HELD BY THE CHARGED IMAGE.
Claim 2
Independent Claim
152 words
A METHOD OF PRODUCING A POWDER IMAGE ON AN ELECTRICALLY CHARGED IMAGE CONSISTING OF TRANSPORTING WITHIN THE ATTRACTION RANGE OF THE CHARGED IMAGE PARTICLES OF INSULATED ATTRACTABLE PIGMENTED POWDER OF A SIZE IN THE ORDER OF .10 TO 20 MICRONS HELD ON SUBSTANTIALLY EQUIDIMENSIONAL LARGER GRANULAR CARRIER PARTICLES BY ATTRACTION, SAID CARRIER PARTICLES BEING OF A SIZE IN THE ORDER OF 30 TO 60 MESH AND HAVING LESS ATTRACTION FOR THE PIGMENTED PARTICLES THAN HAS THE CHARGED IMAGE, ROLLING SAID CARRIER PARTICLES COVERED BY INSULATED PIGMENTED PARTICLES OVER THE IMAGE TO PRESENT THE PIGMENTED PARTICLES HELD ON THE SORFACES OF THE CARRIER PARTICLES TO THE CHARGED IMAGE, THE PIGMENTED PARTICLES BEING ATTRACTED FROM THE CARRIER PARTICLES TO THE CHARGED IMAGE, AND REMOVING THE CARRIER PARTICLES LESS THAN IMAGE ADHERING PIGMENTED PARTICLES FROM THE SURFACE OF THE CHARGED IMAGE TO THEREBY PRODUCE A POWDER IMAGE SUPERIMPOSED ON AND HELD BY THE CHARGED IMAGE.
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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) | 1955-11-18 | 1956-05-19 | 1956-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-18 | 1960-05-19 | 1960-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-18 | 1964-05-19 | 1964-11-18 | $7700.00 | Window Closed / Lapsed |