Telecommunications cable
CA 2019447 C · Owner: Sidi, Shiraz I. · Inventors: Guilbert, Paul A.; Plasse, Michel; Desroches, Lise A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An unshielded telecommunications cable with a nominal characteristic impedance of 100 ohms and a core with a maximum of six pairs of individually insulated conductor wires. The wire insulation is a flame retardant polyolefin base compound and the conductors of each pair are twisted together with a maximum twist lay of 2.3 inches. The core is surrounded by a flame retardant jacket.
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 June 20, 1990 and granted July 26, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 20, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 20, 2012.
- 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.