Polycarbonate composition having reduced tendency to splay
CA 2370029 A1 · Owner: Krishnan, Sivaram · Inventors: Tennant, Jeffrey M.; Derikart, David M.; Ebert, Wolfgang
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A transparent thermoplastic molding composition having good release properties is disclosed. The composition which contains no magnetic elements contains a polycarbonate resin and 0.01 to 0.3 percent by weight of a mold release agent. The agent is the product of a reaction of a compound represented by formula (I), where R1 denotes a C1-30-alkyl group with at least one member selected , from the group consisting of (i) where R2 and R3 independently denote C1-30alkyl or an aryl group, and (ii), where n is 1-7.
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 10, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 10, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 10, 2022.
- 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.