Branched polycarbonates containing hydroxy-naphthoic acids or their derivatives, and process for preparing them
CA 1318452 C · Owner: Petri, Alberto · Inventors: Petri, Alberto
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
CASE 2637, "BRANCHED POLYCARBONATES CONTAINING HYDROXY-NAPHTHOIC ACIDS OR THEIR DERIVATIVES, AND PROCESS FOR PREPARING THEM", Abstract, Branched, thermoplastic polycarbonates suitable for, being processed according to the blow-molding technique are prepared by copolymerization with hydroxy-naphthoic acids or their derivatives.
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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 May 25, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 25, 2010.
- 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.