Resin compositions
CA 2030747 A1 · Owner: Kojima, Shinji · Inventors: Kubo, Junichi; Yoshikawa, Toshitsune; Kojima, Shinji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Resin compositions are made up essentially of a selected class of random copolymers and a selected class of hydrogen donors. The random copolymer results from an ethylene monomer and a styrene-based monomer whereas the, hydrogen donor is chosen from one or more hyrogenated oils of a petroleum or coal origin fractionated to boil in a specified range of temperatures. Radiation resistance is greatly enhanced. Also incorporated in the composition is a selected class of flame retardants to improve proofness to flammability.
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 November 23, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 23, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 23, 2012.
- 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.