US3668058A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Matrix material for production of plastic printing plates
Assignee: Tenneco Chemicals Inc
•
Filing: 1969-07-31
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Granted: 1972-06-06
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Expires: 1989-07-31
Abstract
Abstract A matrix material comprises a sheet of fibrous cellulosic material impregnated with a thermosetting resin, a coating of a thermosetting resin on one surface of said sheet, and a pre-cast sheet of polypropylene film affixed to the coated side of the impregnated cellulosic sheet with an adhesive.
Inventors
- 👤 Nicholas J Pappadakis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:57
CPC Classifications
B; B41; B41N; B41N1/00; B41N1/12; B32; B32B; B32B27/00; Y; Y10; Y10S; Y10S428/00; Y10S428/908; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/31504; Y10T428/31855; Y10T428/31859; Y10T428/31877; Y10T428/31909; Y10T428/31913; Y10T428/31917; Y10T428/31942; Y10T428/31946
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
40 words
A matrix material for the production of polyester printing plates as set forth in claim 1 wherein the sheet of fibrous material is impregnated with 45 percent to 55 percent of the amount of thermosetting resin that would saturate it.
Claim 2
Dependent Claim
27 words
A matrix material for the production of polyester printing plates as set forth in claim 1 wherein the impregnated sheet is 0.07 inch to 0.10 inch thick.
Claim 3
Dependent Claim
36 words
A matrix material for the production of polyester printing plates as set forth in claim 1 wherein the coating of thermosetting resin on one side of the impregnated sheet is 0.005 inch to 0.020 inch thick.
Claim 4
Dependent Claim
24 words
A matrix material for the production of polyester printing plates as set forth in claim 1 wherein the fibrous material consists of cellulose fibers.
Claim 5
Dependent Claim
26 words
A matrix material for the production of polyester printing plates as set forth in claim 1 wherein the fibrous sheet is impregnated with a phenol-formaldehyde resin.
Claim 6
Dependent Claim
26 words
A matrix material for the production of polyester printing plates as set forth in claim 1 wherein the impregnated sheet is coated with a phenol-formaldehyde resin.
Claim 7
Dependent Claim
27 words
A matrix material for the production of polyester printing plates as set forth in claim 1 wherein the sheet of polyolefin resin is a precast polypropylene film.
Claim 8
Dependent Claim
23 words
A matrix material for the production of polyester printing plates as set forth in claim 1 wherein the adhesive is an acrylonitrile-butadiene copolymer.
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) | 1975-06-06 | 1975-12-06 | 1976-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-06 | 1979-12-06 | 1980-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-06 | 1983-12-06 | 1984-06-06 | $7700.00 | Window Closed / Lapsed |