US3591378A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making positive-working relief plate
Assignee: Eastman Kodak Co
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Filing: 1968-07-31
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Granted: 1971-07-06
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Expires: 1988-07-31
Abstract
Abstract POSITIVE PHOTOMECHANICAL REPRODUCTION ARE PREPARED FROM NORMALLY NEGATIVE-WORKING PHOTOSENSITIVE COMPOSITIONS WHICH COMPRISE AN ORGANIC SOLVENT-SOLUBLE COLLOID AND AN OXYGEN-SENSITIVE ARYL AZIDE SENSITIZER THEREFOR, BY FIRST IMAGEWISE EXPOSING THE COMPOSITION IN THE PRESENCE OF OXYGEN, THEN OVERALL EXPOSING THE COMPOSITION IN THE ABSENCE OF OXYGEN AND DEVELOPING AN IMAGE BY REMOVING THE COMPOSITION FROM AREAS WHICH HAVE RECEIVED BOTH AN IMAGEWISE AND OVERALL EXPOSURE.
Inventors
- 👤 Joseph H Altman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:13
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/008
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) | 1974-07-05 | 1975-01-04 | 1975-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-05 | 1979-01-04 | 1979-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-05 | 1983-01-04 | 1983-07-06 | $7700.00 | Window Closed / Lapsed |