Resin molded body for optical parts
CA 1340146 C · Owner: Sawada, Hisashi · Inventors: Takoshima, Takehisa; Tanaka, Akira; Takahashi, Eietsu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides a resin molded body for optical parts, and comprises a solid solution of a polycarbonate and a polyester carbonate. In the resin molded body of the present invention when the amount incorporated of the polyester carbonate is increased, the light transmission loss is increased but the distortion temperature is considerably raised and a high heat resistance is obtained.
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 November 24, 1998. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 24, 2015.
- 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.