Liquid crystal device
CA 2000210 A1 · Owner: Murata, Makoto · Inventors: Murata, Makoto; Uekita, Masakazu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A liquid crystal device containing an orientation film is disclosed, the orientation film being obtained by building up at least one mixed monomolecular film on a substrate having thereon an electrode layer said mixed, monomolecular film being obtained by spreading a mixture of (a) an amphiphilic high-molecular weight substance having a number average molecular weight of from 2,000 to 300,000 and containing a repeating unit represented by formula (I): (I), wherein at least one of R1 and R2 represents a group characterized by benzenoid unsaturation having at least 6 carbon atoms; and R3, R4, R5, and R6, which may be the same or different, each represents a hydrogen atom a substituted or, …
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 October 5, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 5, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 5, 2011.
- 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.