Polymers of 3-ethyl-1-hexene
CA 2055667 C · Owner: Stricklen, Phil M. · Inventors: Drake, Charles A.; Stricklen, Phil M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A new polymer and copolymer composition comprising 3-ethyl-1-hexene is provided. This new polymer composition of 3-ethyl-1-hexene homopolymer has a crystalline melting point of about 425°C to about 435°C and is particularly useful for applications requiring high temperatures. This new polymer and copolymer composition is produced by utilizing a catalyst comprising at least one transition metal and at least one organometallic halide compound.
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 November 15, 1991 and granted March 4, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 15, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 15, 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.