Stabilized aromatic polyester compositions
CA 1309544 C · Owner: Rosenfeld, Jerold C. · Inventors: Rosenfeld, Jerold C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An aromatic polyester composition comprising an aromatic polyester derived from terephthalic acid and/or isothalic acid and a bisphenol and a stabilizer chosen from Pcontaining organic esters, O, or S-containing organic compounds or their mixtures. The composition is heat stable and can be used to prepare molded articles which are free from coloration and do not develop coloration even at high temperatures. The composition is also stable against decomposition and reduction of intrinsic viscosity at elevated temperatures.
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 October 27, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 27, 2009.
- 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.