Canadian application, no grantCanada
Laminates utilizing chemically etchable adhesives
CA 2055878 A1 · Owner: E.I. Du Pont De Nemours And Company · Inventors: Manos, Philip
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A multllayer laminate havlng a metalllc layer and a dielectric layer, such as a chemically etchable polyimide, bonded to each other with a chemically etchable adhesive contalning phenolic ester groups in the backbone. 51
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed November 20, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 20, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 20, 2013.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 20, 1991
GrantedNo grant recorded
Term endedNovember 20, 2011
Patent numberCA 2055878 A1
Classification (IPC)B32B15/08 +2 more
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.