Polymers
CA 1316624 C · Owner: Drent, Eit · Inventors: Drent, Eit
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel polymers of carbon monoxide with at least two olefinically unsaturated organic compounds characterized in, that, a) they are prepared by the polymerization of carbon monoxide with one or more olefinically unsaturated hydrocarbons (A) and with one or more carboxylic acid esters (B) in which there occurs a polymerizable , group directly linked to a carbonyloxy group, b) they have a linear structure c) they are made up of units of the general formula -CO-(A')and units of the general formula -CO-(B')wherein A' and B', represent monomer units originating in monomers A and B respectively, used and, d) per unit -CO-(B')- they contain 10-400 units -CO-(A')-.
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
- Granted April 20, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 20, 2010.
- 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.