Self reinforced composite of thermotropic liquid crystal polymers
CA 2086931 C · Owner: The University Of Akron · Inventors: Isayev, Avraam; Subramanian, Pazampalaco R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Blend of two or more thermotropic liquid crystal polymers and process for preparing same. Blends of this invention contain at least two, preferably only two, thermotropic liquid crystal polymers which are melt processable. These liquid crystal polymers are wholly aromatic polyesters. At least two polymers in the blend are processable in the melt phase and phase separated in the solid phase. Solid reinforcing agents may be present. but are not necessary and in any case must be in the solid phase at temperatures at which the blend is melt processable. Products of this invention are formed in the melt phase under high strain conditions. Polymer composites of this invention are especially …
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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 August 15, 1991 and granted June 15, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 15, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 15, 2013.
- 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.