Emi shielding having flexible conductive envelope
CA 2136469 C · Owner: Annis, Gerald A. · Inventors: Annis, Gerald A.; Welch, Robert L.; Hoge, William C. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An electronic device such as a portable computer is shielded against electromagnetic, interference using a flexible envelope that surrounds a circuit card within the housing of the, device. The flexible envelope forms a shielding enclosure and has an electrically insulating, flexible sheet for example of polyethylene, and a sheet of conductive fibers embedded in the, flexible sheet so as to leave a nonconductive face oriented toward the circuit card. The, conductive fibers can be metallized nylon and are sufficiently dense to obtain a resistivity of 10-1, to 100-2 .OMEGA./~. The enclosure forms a hollow envelope with the conductive fibers coupled, electrically across a seam for …
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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 23, 1994 and granted July 8, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 23, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 23, 2016.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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.