Radiating coaxial cable for plenum applications
CA 2113930 C · Owner: Visser, Leonard J. · Inventors: Rampalli, Sitaram; Visser, Leonard J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A radiating air-dielectric coaxial cable for plenum applications comprises an inner conductor; a dielectric spacer around the inner conductor; and a single, continuous, outer conductor surrounding the dielectric spacer in direct contact therewith. The outer conductor has apertures along its length for the passage of electromagnetic radiation; at least one layer of inert flame-retardant barrier tape, wrapped over the outer surface of the outer conductor so as to cover each of the radiating apertures of said outer conductor to prevent the dielectric spacer from flowing out through the radiating apertures when the dielectric material is melted; and a jacket of highly flame-retardant polymer …
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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 January 21, 1994 and granted September 30, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 21, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 21, 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.