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Expired Canadian patentCanada

Method of pulverizing cholesteric type liquid crystals

CA 1108838 A · Owner: Citation Japan Trading Co. Ltd. · Inventors: Shibanai, Ichiro

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Abstract From the Canadian patent

It is known to apply liquid crystal solutions to a substrate dry, the coating and then cover the coated substrate with a further protective coating. Such coated substrates lack sufficient adhesion between the various coatings to be useful. Additionally it is difficult to coat substrates with liquid crystals. The present seeks to provide a pulverulent liquid crystal composition useful in preparing coating composition. The present invention provides a process for preparing a pulverulent micro-encapsulated cholesteryltype liquid crystal composition comprising mixing about equal parts of a microencapsulated cholesteryl-type liquid crystal having a particle size from about 10 to about 30 microns …

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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 September 15, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 15, 1998.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 14, 1978
GrantedSeptember 15, 1981
Term endedSeptember 15, 1998
Patent numberCA 1108838 A
Classification (IPC)G02F1/13 +1 more

Timeline

Timeline From CIPO dates

1979198119831985198719891991199319951997Application filedAug 14, 1978Patent grantedSep 15, 1981Term endedSep 15, 1998

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.