Process for producing a sheet of color-developer for pressure-sensitive recording paper
CA 1269245 C · Owner: Naoki, Makoto · Inventors: Aoyagi, Shouzou; Naoki, Makoto
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
27 -, ABSTRACT OF THE DISCLOSURE:, Disclosed herein is a process for producing a sheet of a color-developer for a pressure-sensitive recording paper which process comprises the steps of dissolving an organic color-developer in an organic solvent, dispersing the formed solution into water, thereby forming minute liquid droplets with a diameter of 0.01 to 2 µm, removing the solvent in the liquid droplets by heating while taking care not to cause any coalescence of the droplets and also any unstabilization of the emulsion, thereby forming a slurry comprising the minute granules of the color-developer and applying the slurry on a supporting sheet.
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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 22, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 22, 2007.
- 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.