Thermally stabilized polyetherimides
CA 1266539 C · Owner: General Electric Company · Inventors: Avakian, Roger W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A thermally stabilized polyetherimide is disclosed which contains a polyetherimide and a stabilizing amount of an antioxidant having a molecular weight of 400 and is selected from the group of hindered phenols arylphosphosphonites, organic phosphites thioesters or, mixtures thereof. The stabilized polyetherimides exhibit a prolonged stability under conditions of 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 March 6, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 6, 2007.
- 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.