Process for producing photographic images with photosensitive materials and products produced thereby
Abstract
Abstract THIS INVENTION RELATES TO A PROCESS OF PRODUCING PHOTOGRAPHIC IMAGES USING PHOTOSENSITIVE MATERIALS WHICH HAVE BEEN PRESENSITIZED BY EXPOSURE TO ACTIVATING RADIATION OS THAT THE PHOTOSENSITIVE SUBSTRAT BECOMES SENSITIVE TO WAVELENGTHS OF RADIATION TO WHICH THE SUBSTRATE IS USUALLY NOT SENSITIVE. THE PHOTOSENSITIVE MATERIAL WHICH BECOMES REVERSIBLY ACTIVATED UPON EXPOSURE TO ACTIVATING RADIATION BUT PREFERABLY REMAINS UNCHANGED AFTER SUCH EXPOSURE IS HEREINAFTER REFERRED TO AS A PHOTOCONDUCTOR. THE PRESENSITIZED PHOTOCONDUCTOR IS EXPOSED TO A PATTERN OF DEACTIVATION TO FORM A LATENT IMAGE THEREON CORRESPONDING TO THE PATTERN. FOR EXAMPLE, THE PRESENSITIZED PHOTOCONDUCTOR IS EXPOSED TO A PATTERN OF LGHT TO WHICH THE PRESENSITIZED PHOTOCONDUCTOR IS SENSITIZED TO FORM A LATENT IMAGE AND, AFTER DECAY OF THE LATEN IMAGE, THE PHOTOCONDUCTOR IS FLOODED WITH SIMILAR LIGHT TO FORM A POSITIVE LATEN IMAGE OF THE PATTERN WHICH IS DEVELOPED BY KNOWN METHODS, E.G. USING IMAGE-PRODUCING AGENTS, TO OBTAIN THE VISIBLE IMAGE OF THE PATTERN.
Inventors
- 👤 Gerald Matthew Fletcher
Bibliographic Details
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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) | 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 |