Tree resistant cable
CA 2269419 C · Owner: Keogh, Michael John · Inventors: Keogh, Michael John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure A composition comprising polyethylene and for each 100 parts by weight of polyethylene about 0.1 to about 3 parts by weight of the reaction product of (i) an aliphatic diacid anhydride or a polymer or copolymer thereof wherein the anhydride has 4 to 20 carbon atoms; and (ii) a polymer selected from the group consisting of a polycaprolactone a polyalkylene glycol, a monoalhyl ether of a polyalkylene glycol and a mixture of two or more of said polymers the weight ratio of component (ii) to component (i) being in the range of about 0.05:1 to about 1:1.
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 April 19, 1999 and granted June 10, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 19, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 19, 2021.
- 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.