US2637651A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing images on rigid surfaces
Assignee: Battelle Development Corp
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Filing: 1948-10-02
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Granted: 1953-05-05
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Expires: 1968-10-02
Abstract
No abstract record available.
Inventors
- 👤 Harold E Copley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:10
CPC Classifications
G; G03; G03G; G03G13/00; G03G13/14; G03G13/16; Y; Y10; Y10S; Y10S101/00; Y10S101/37
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
THE METHOD WHICH COMPRISES TRANSFERRING A POWDER IMAGE FORM AN ELECTROPHOTOGRAPHIC PLATE TO A FLEXIBLE TRANSFER SHEET BY MEANS OF AN ELECTRIC CHARGE APPLIED BY CORONA DISCHARGE TO THE TRANSFER SHEET WHILE THE LATTER IS IN CONTACT WITH THE PLATE, THEN TRANSFERRING THE POWDER IMAGE FROM SAID FLEXIBLE TRANSFER SHEET TO THE RIGID SURFACE OF A PRINTING ELEMENT BY MEANS OF AN ELECTRIC CHARGE APPLIED BY CORONA DISCHARGE TO THE TRANSFER SHEET WHILE THE LATTER IS IN CONTACT WITH THE PRINTING ELEMENT, AND FIXING THE POWDER IMAGE ON SAID PRINTING ELEMENT.
Claim 2
Independent Claim
91 words
THE METHOD WHICH COMPRISES TRANSFERRING A POWDER IMAGE FORM AN ELECTROPHOTOGRAPHIC PLATE TO A FLEXIBLE TRANSFER SHEET BY MEANS OF AN ELECTRIC CHARGE APPLIED BY CORONA DISCHARGE TO THE TRANSFER SHEET WHILE THE LATTER IS IN CONTACT WITH THE PLATE, THEN TRANSFERRING THE POWDER IMAGE FROM SAID FLEXIBLE TRANSFER SHEET TO THE RIGID SURFACE OF A PRINTING ELEMENT BY MEANS OF AN ELECTRIC CHARGE APPLIED BY CORONA DISCHARGE TO THE TRANSFER SHEET WHILE THE LATTER IS IN CONTACT WITH THE PRINTING ELEMENT, AND FIXING THE POWDER IMAGE ON SAID PRINTING ELEMENT.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-04 | 1956-11-03 | 1957-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-04 | 1960-11-03 | 1961-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-04 | 1964-11-03 | 1965-05-05 | $7700.00 | Window Closed / Lapsed |