US3558307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic image reproduction with pre-exposure
Assignee: Dennison Manufacturing Co
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Filing: 1966-10-07
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Granted: 1971-01-26
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Expires: 1986-10-07
Abstract
Abstract A METHOD FOR FORMING A LATENT ELECTROSTATIC IMAGE ON A PHOTOCONDUCTIVE PLATE WHEREIN THE PLATE IS UNIFORMLY PREEXPOSED TO ELECTROMAGNETIC RADIATION HAVING A LOW INTENSITY SUCH THAT THE CHARGE ACCEPTANCE OF THE PLATE TO AN APPLIED ELECTROSTATIC CHARGE IS AT LEAST ABOUT 80% OF ITS CHARGE ACCEPTANCE IF THE PLATE WERE NOT SO PRE-EXPOSED. PREFERABLY SUCH PRE-EXPOSURE SHOULD BE USED IN CONJUCTION WITH AN IMAGE EXPOSURE IN WHICH SUBSTANTIALLY ALL THE LIGHT STRUCK AREAS OF THE PLATE RETAIN A MEASURABLE AMOUNT OF CHARGE.
Inventors
- 👤 Lee A Carlson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:38
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/04
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) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |