Thermotropic liquid crystal segmented block copolymer
CA 2113113 A1 · Owner: Lu, Caixia · Inventors: Kantor, Simon W.; Lenz, Robert W.; Lu, Caixia
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel segmented block copolymers comprising mesogenic (or ''rod'') blocks and flexible coil polymer blocks are disclosed which can be blended with a substantially similar flexible coil polymer matrix to improve the mechanical properties of the flexible coil matrix. For example, blends of poly(butylene terephthalate) (PBT) with a liquid crystalline block copolymer poly(tetramethylene, 4,4'-terephthaloyl-dioxydibenzoate)-b-poly(butylene terephthalate) (LCP-b-PBT) were prepared by precipitation from a common solvent dried, and melt extruded through a capillary die to produce a monofilament. In all blends, the LCP-b-PBT domains were less than 0.1 µm in size and ultrafinely and uniformly …
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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
- Filed July 7, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 7, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 7, 2014.
- 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.