Thermoplastic resin compositions
CA 2093835 C · Owner: Dai-Ichi Kogyo Seiyaku Co. Ltd. · Inventors: Hotta, Hiroshi; Kikuta, Manabu; Kitazawa, Naoki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A thermoplastic resin composition has a Component A, Component B, and Component C. Component A represents a polymer having a functional group which can react with an amino group. Alternatively, Component A also contains a resin. Component B represents a thermoplastic resin which is substantially non-reactive with an amino group under molding conditions, and which differs from the thermoplastic resin of Component A. Component C represents a graft polymer obtained by a graft reaction of a thermoplastic polymer with a formamide compound of the general formula (I) or a copolymer having a formamide repeating unit of the general formula (II) and a repeating unit of an ethylenic unsaturated …
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 April 13, 1993 and granted August 31, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 13, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 13, 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.