Polymeric polyketone derivatives
CA 1325306 C · Owner: Drent, Eit · Inventors: Drent, Eit; Wong, Pui Kwan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Polymeric polyketone derivatives obtainable by reacting at least two thirds of the ketone groups in a linear alternating polymer of carbon monoxide and an olefinically unsaturated compound of repeating formula -CO-CH2-CHZ- with an amino compound of formula H2NR and/or a 1,2-dihydroxyalkane of formula , where A, R, Z and n have specified meanings and a, process for their preparation.
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 December 14, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 14, 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.