US3615538A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photosensitive printing plates
Assignee: Printing Developments Inc
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Filing: 1968-08-02
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Granted: 1971-10-26
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Expires: 1988-08-02
Abstract
Abstract Photosensitive printing plates wherein the photosensitive resist coating is adhered to the metallic base layer by means of a silane compound to improve the physical properties of the photosensitive resist coating so it will withstand mechanical action during hand development and further wherein the photosensitive resist coating also contains a dye or a pigment to increase contrast after development, to improve reproduction characteristics and to increase mechanical resistance.
Inventors
- 👤 John E Peters
- 👤 Donald B Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:28
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/075; G03F7/0751
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
32 words
The photosensitive printing plate as defined by claim 1 wherein the silane compound is present in the photosensitive resist coating in an amount from about 2.4% to about 45% by weight thereof.
Claim 2
Dependent Claim
21 words
The photosensitive printing plate as defined by claim 2 wherein the amount of silane compound is about 31% by weight thereof.
Claim 3
Dependent Claim
29 words
The photosensitive printing plate as defined by claim 1 wherein the silane compound is present as an intermediate layer between the metallic base layer and the photosensitive resist coating.
Claim 4
Dependent Claim
41 words
The photosensitive printing plate as defined by claim 2 wherein the photosensitive resist coating also contains from about 0.2% to about 2% by weight of a dye selected from the group consisting of triarylmethane dyes, xanthene dyes and copper phthalocyanine dyes.
Claim 5
Dependent Claim
19 words
The photosensitive printing plate as defined by claim 5 wherein the amount of dye is about 1.2% by weight.
Claim 6
Dependent Claim
40 words
The photosensitive printing plate as defined by claim 4 wherein the photosensitive resist coating contains from about 0.2% to about 2% by weight of a dye selected from the group consisting of triarylmethane dyes, xanthene dyes and copper phthalocyanine dyes.
Claim 7
Dependent Claim
19 words
The photosensitive printing plate as defined by claim 7 wherein the amount of dye is about 1.2% by weight.
Claim 8
Dependent Claim
42 words
The photosensitive printing plate as defined by claim 4 wherein the photosensitive resist coating also contains from about 3% to about 20% by weight of a pigment selected from the group consisting of phosphotungstomolybdic lakes of triarylmethane dyes and copper phthalocyanine pigments.
Claim 9
Dependent Claim
19 words
The photosensitive printing plate as defined by claim 9 wherein the amount of pigment is about 12% by weight.
Claim 10
Dependent Claim
17 words
The photosensitive printing plate as defined by claim 1 wherein the silane compound is N-beta-aminoethyl-gamma-aminopropyl trimethoxy silane.
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) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |