Method of manufacturing plastic particles for a particle display
CA 1317425 C · Owner: Leidner, Jacob · Inventors: Leidner, Jacob
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A particle display comprises a plurality of particles which in an electrical field rotate to expose either their white or black surface depending upon the polarity of the field. The particles of the display are generally spherical and composed of first and second substantially hemispherical portions of two distinct colours. The first hemispherical portion includes a material which imparts predetermined electrical property thereto, which is different from the electrical properties of the second portion. The process for making these particles comprises adding to a heated liquid bath non-spherical particles consisting of a first layer of plastic, having a first colour and the predetermined …
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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 May 11, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 11, 2010.
- 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.