US3560204A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Printing by electrical attraction of inks
Assignee: International Business Machines Corp
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Filing: 1966-11-07
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Granted: 1971-02-02
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Expires: 1986-11-07
Abstract
Abstract PRINTING IS EFFECTED BY FIRST PLACING AN ELECTRIC CHARGE OVER THE COATED SURFACE OF A ZINC OXIDE COATED WEB OF PAPER. THIS CHARGE IS NEUTRALIZED IN SELECTED IMAGE AREAS BY A PROJECTED LIGHT IMAGE. THE WEB IS THEN PASSED BETWEEN A GROUND ELECTRODE AND A SMOOTH INK BEARING CONDUCTIVE DRUM CHARGED TO A POTENTIAL ON THE ORDER OF THAT OF THE UNNEUTRALIZED PORTIONS. LIQUID INK FROM THE DRUM IS BODILY ATTRACTED FROM THE DRUM TO THE NEUTRALIZED IMAGE AREAS IN AN UNSUPPORTED COLUMN.
Inventors
- 👤 Eugene P Damm Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:04
CPC Classifications
G; G03; G03G; G03G13/00; G03G13/26; G03G15/00; G03G15/06; G03G15/10; G03G15/101; G03G15/102; G03G9/00
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) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |