Tree resistant cable
CA 2275002 C · Owner: Union Carbide Chemicals & Plastics Technology Corporation · Inventors: Keogh, Michael John; Pang, Kawai Peter; Caronia, Paul Joseph
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A composition comprising: (i) polyethylene and, based on 100 parts by weight of component (i) (ii) about 0.3 to about 0.6 part by weight of 4,4'- thiobis(2-methyl-6-t-butylphenol); 4,4'-thiobis(2-t-butyl-5- methylphenol); 2,2'-thiobis(6-t-butyl-4-methylphenol); or a mixture of said compounds; and (iii) about 0.4 to about 1 part by weight of a polyethylene glycol having a molecular weight in the range of about 1000 to about 100,000.
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 15, 1999 and granted February 4, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 15, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 15, 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.