Processes for thermal transfer ink donor films
CA 1320398 C · Owner: Branston, Randolph E. · Inventors: Duff, James Mcconnell; Branston, Randolph E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An emulsion process for the preparation of thermal ink donor films which comprises (1) the addition of wax or soluble polymer components to a warm hydrocarbon solution; (2) adding thereto first additives that are soluble in the solution; (3) forming an emulsion thereof by adding the formed solution to an alcohol or a polar solvent which may, also contain dissolved second additives grinding the resulting emulsion, with a suitable pigment; (4) coating the product obtained on a supporting substrate; and (5) thereafter heating to enable evaporation of the hydrocarbon.
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
- Granted July 20, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 20, 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.