Patent US4136615A successfully refreshed from Google Patents.
US4136615A
Expired / Lapsed
US
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Pattern plate of composite structure
Assignee: Dow Chemical Co
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Filing: 1977-09-23
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Granted: 1979-01-30
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Expires: 1997-09-23
Abstract
Abstract A pattern plate for use in printing has an etched sheet of magnesium laminated to a self-supporting, dimensionally stable, all-plastic base structure of adhesive ethylene/carboxylic acid copolymer layer and poly(ethylene terephthalate) sheet. The magnesium sheet is preferably of minimal thickness corresponding to the maximum depth of etch, e.g. 30 mils, and is bonded to the adhesive ethylene/carboxylic acid copolymer layer, e.g. ethylene/acrylic acid copolymer layer, which is bonded to the poly(ethylene terephthalate) sheet.
Inventors
- 👤 Norman J. Pozniak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:23
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/04; B32B15/08; B32B15/20; B32B23/00; B32B23/04; B32B23/042; B32B23/20; B32B23/22; B32B27/00; B32B27/28; B32B27/285; B32B27/286; B32B27/30; B32B27/302; B32B27/308; B32B27/32; B32B27/34; B32B27/36; B32B27/365; B32B7/00; B32B7/04; B32B7/12; B41; B41N; B41N1/00; B41N1/04; B41N1/06; B32B2311/00; B32B2311/20; B32B2311/24; B32B2323/00; B32B2323/04; B32B2325/00; B32B2367/00; B32B2369/00; B32B2371/00; B32B2377/00; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/31504; Y10T428/31678; Y10T428/31692; Y10T428/31786; Y10T428/31797
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A composite laminated pattern plate having an etchable sheet of magnesium having unetched thickness of approximately 30 mils bonded to a self-supporting, dimensionally stable, all-plastic base structure composed of an intermediate layer of adhesive copolymer of ethylene and acrylic acid, which intermediate layer has substantially uniform thickness in the approximate range from 0.5 to 2 mils, and a backing sheet of poly(ethylene terephthalate) having substantially uniform thickness in the approximate range from 2 to 5 mils.
Claim 2
Dependent Claim
76 words
A composite laminated pattern plate having an etchable sheet of magnesium having unetched thickness of approximately 30 mils bonded to a self-supporting, dimensionally stable, all-plastic base structure composed of an intermediate layer of adhesive copolymer of ethylene and acrylic acid, which intermediate layer has substantially uniform thickness in the approximate range from 0.5 to 2 mils, and a backing sheet of poly(ethylene terephthalate) having substantially uniform thickness in the approximate range from 2 to 5 mils.
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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) | 1982-01-29 | 1982-07-31 | 1983-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-29 | 1986-07-31 | 1987-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-29 | 1990-07-31 | 1991-01-30 | $7700.00 | Window Closed / Lapsed |