Flame retardant polycarbonate composition
CA 1062837 A · Owner: General Electric Company · Inventors: Mark, Victor
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A flame retardant polycarbonate composition comprising in admixture an aromatic carbonate polymer and a flame retardant additive an alkali or alkaline earth metal salt, of a sulfonic acid wherein the sulfonic acid group is attached to a non-aromatic carbon atom. Desirably the hydrocarbyl radical of the sulfonic acid is substituted by electronegative groups. Thermoplastic articles in conformity with the standard of UL-94 Burning Test grade SE-O can be prepared. Translucent or transparent articles result when the refractive index of the additive is in the range of 1.54 to 1.65.
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 September 18, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 18, 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.