Ink composition and a pressure sensitive reproducing material
CA 1306083 C · Owner: Adger Kogyo Co. Ltd. · Inventors: Iijima, Zenshiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The object of the present invention is to provide a new ink composition and a reproducing material without using any pigment capable of drawing or reproducing clear white colored letters or patterns on a sheet of black or dark colored paper cloth, leather, or the like, and the letters or patterns drawn or reproduced are easily erasable with the application of water when they become unnecessary. The ink composition of the present invention comprises a white colored water soluble aliphatic sulfate as a coloring matter. The white colored water soluble aliphatic sulfate which can be used in the present invention includes alkali-salt of lauryl, sulfate, myristil sulfate cetyl sulfate, stearil …
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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 August 11, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 11, 2009.
- 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.