Alkenyl substituted stabilizers
CA 2040904 C · Owner: Odorisio, Paul A. · Inventors: Odorisio, Paul A.; Rutsch, Werner; Babiarz, Joseph E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compounds of formula I, wherein X is a group of formula Ia or Ib R1 and R2 are independently e.g, hydrogen alkyl, alkenyl, aryl or , phenylalkyl, and R3 to R7 are independently e.g. hydrogen, alkyl or substituted alkyl are very effective process, stabilizers for polymeric systems providing melt flow stabilization and resistance to dis-, coloration during processing at elevated temperatures as well as effective stabilizers for, lubricant compositions.
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 April 22, 1991 and granted January 8, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 22, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 22, 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.