Aerial cable
CA 2043140 C · Owner: Harbrecht, Paul William · Inventors: Mullin, Francis Joseph; Riordan, James Joseph; Mitchell, David Marshall
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An aerial cable includes a transmission portion and a supporting portion. The transmission portion includes a core comprising at least one transmission medium enclosed in a relatively flexible dielectric wrapping material. The wrapping material is enclosed by two metallic shields between which is interposed a layer of a waterblocking material. An outer one of the shields is formed with overlapping longitudinal edge portions at least one of which is turned inwardly toward the core. A cavity between those edge portions is provided with a waterblocking material which inhibits the longitudinal flow of water. The supporting portion includes a longitudinally extending strand material capable of …
Read the whole patent
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 May 23, 1991 and granted November 8, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 23, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 23, 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.
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.