US3549733A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing polymeric printing plates
Assignee: EIDP Inc
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Filing: 1968-12-04
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Granted: 1970-12-22
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Expires: 1988-12-04
Abstract
Abstract 1298224 Printing plates by laser treatment of polyacetals E I DU PONT DE NEMOURS & CO 1 Dec 1969 [4 Dec 1968] 58497/69 Heading C3P [Also in Division H1] A polymeric printing plate is obtained by subjecting the surface of the plate to a focused laser beam of sufficient intensity to decompose and form depressions in the surface and controlling the position and intensity of the beam to form a pattern of predetermined shape and depth. The plate is composed of polymers containing certain structural units. They are typically polychloral, formaldehyde or ethylene oxide/hexafluoroacetone copolymers, end-capped polyoxymethylene, polythiocarbonyl fluoride, or chloral/pchlorophenylisocyanate copolymer.
Inventors
- 👤 Jack R Caddell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:47
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/039; B; B23; B23K; B23K26/00; B23K26/02; B23K26/06; B23K26/064; B23K26/066; B41; B41C; B41C1/00; B41C1/02; B41C1/04; B41C1/05
Claims Analysis
Total Claims: 0
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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) | 1973-12-21 | 1974-06-22 | 1974-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-21 | 1978-06-22 | 1978-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-21 | 1982-06-22 | 1982-12-22 | $7700.00 | Window Closed / Lapsed |