Encapsulated particulate magnetic development powders containing a sublimable dyestuff
CA 1263552 C · Owner: Mehl, Wolfgang · Inventors: Mehl, Wolfgang
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A novel magnetic electrophotgraphic, development or, toner powder is provided comprising essentially spherical particles with a diameter between 5 and 50µ. The particles contain small ferromagnetic particles highly conducting carbon, at least 5% sublimable dyestuff and at least 4% of a surface active agent. The particles are preferably structured to have an inside nucleus zone containing dyestuff and surfactant and an outside shell zone which contains the magnetic material and the highly conducting carbon.
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 December 5, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 5, 2006.
- 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.