Method for manufacturing a pyroelectric mixture
CA 2193563 C · Owner: Blinov, Lev · Inventors: Blinov, Lev; Dultz, Wolfgang; Soto Bustamante, Eduardo A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a method for manufacturing a pyroelectric mixture, in particular for pyroelectric and piezoelectric elements. The method that is used to do this includes the following steps: mixing at least two compounds in a predetermined mixing ratio, one compound containing a polymerizable, preferably achiral, liquid crystalline monomer the other compound being advantageously an achiral liquid crystal polymer or copolymer. Each compound contains substituents that form hydrogen bridges. The mixture is heated above the specific glass point. Next, an electrical field is applied with the help, of which the polymerizable monomer polymerizes and the mixture is poled. With the …
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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 December 20, 1996 and granted April 22, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 20, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 20, 2018.
- 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
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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.