Polymerization inhibition of acrylate esters
CA 1056148 A · Owner: Nalco Chemical Company · Inventors: Jursich, Myron J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for inhibiting the polymerization of crude acrylate ester mixtures during their purification by distillation which comprises conducting said distillation in the presence of an inhibitor combination comprising a phenolic-type polymerization inhibitor and an amine-type polymerization inhibitor combined in a weight ratio of 4:1 to 1:4 with the amount of the inhibitor combination being 0.01 to 20% by weight based on the weight of the pure acrylate eater present in the crude acrylate ester mixture.
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 June 12, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 12, 1996.
- 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.