US4093768A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copper foil electrical laminate with reinforced plastics
Assignee: Cook Composites and Polymers Co
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Filing: 1976-02-19
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Granted: 1978-06-06
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Expires: 1996-02-19
Abstract
Abstract Laminates of reinforced plastics and copper foil are prepared with a small quantity of benzotriazole in the plastic ingredient. The resulting laminate has excellent bond between the plastic and the copper foil and hence can be employed as an electrical circuit board.
Inventors
- 👤 Howard P. Cordts
- 👤 Robert F. Navin
- 👤 R. Charles Ross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:38
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/04; B32B15/08; B32B15/20; B32B27/00; B32B27/36; H; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0313; H05K1/0353; H05K1/0373; B32B2262/00; B32B2262/10; B32B2262/101; B32B2305/00; B32B2305/08; B32B2311/00; B32B2311/12; B32B2457/00; B32B2457/08; H05K2201/00; H05K2201/01; H05K2201/0137; H05K2201/0145; H05K2203/00; H05K2203/12; H05K2203/122; H05K2203/124; H05K3/00; H05K3/38; H05K3/389; Y; Y10; Y10S; Y10S428/00; Y10S428/901; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249924; Y10T428/24994; Y10T428/24995; Y10T428/249951; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2964; Y10T428/2967; Y10T428/2969; Y10T428/31504; Y10T428/31551; Y10T428/31616; Y10T428/31678; Y10T428/31681
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
49 words
A copper foil electrical laminate comprising a sheet of copper or copper alloy foil directly bonded to glass fiber reinforced unsaturated polyester resin containing up to about 2% by weight, based on the unsaturated polyester resin syrup of benzotriazole incorporated in said resin prior to curing of said resin.
Claim 2
Dependent Claim
49 words
A copper foil electrical laminate comprising a sheet of copper or copper alloy foil directly bonded to glass fiber reinforced unsaturated polyester resin containing up to about 2% by weight, based on the unsaturated polyester resin syrup of benzotriazole incorporated in said resin prior to curing of said resin.
Claim 3
Dependent Claim
32 words
The laminate of claim 1 wherein two copper or copper alloy foils are employed as the outer surfaces and an inner core of the glass fiber reinforced unsaturated polyester resin is presented.
Claim 4
Dependent Claim
30 words
The electrical laminate of claim 1 wherein the said unsaturated polyester resin is the reaction product of polyhydric alcohol and dicarboxylic acids consisting essentially of isophthalic acid and maleic anhydride.
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) | 1981-06-05 | 1981-12-05 | 1982-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-05 | 1985-12-05 | 1986-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-05 | 1989-12-05 | 1990-06-06 | $7700.00 | Window Closed / Lapsed |