Transfer of methine dyes
CA 2064340 A1 · Owner: Basf Aktiengesellschaft · Inventors: Sens, Ruediger; Etzbach, Karl-Heinz
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for transferring methine dyes from a transfer to plastic-coated paper by diffusion with the aid of an energy source comprises using a transfer on which there is or are located one or more dyes of the formula, K-N=B, where K is an aromatic carboxylic or heterocyclic radical and, B is the radical of an acidic CH compound.
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
- Filed March 23, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 23, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 23, 2014.
- 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.