Electrophotographic toner
CA 1316741 C · Owner: Mitsui Toatsu Chemicals, Inc. · Inventors: Hirayama, Nobuhiro; Fujiwara, Akio; Misawa, Akira
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention discloses electrophotographic toners and the methods for their preparation. The electrophotographic toners contain resin and coloring agents as primary components. The resin is a noncrosslinked polymer of vinyl monomers or its mixtures and has a number average molecular weight (Mn) of 2,000 - 15,000, a Z average molecular weight (Mz) of not less than 400,000 and Mz/Mn of 50 - 600. The electrophotographic toners exert an excellent fixing ability at high duplication speed or at lower temperatures.
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 April 27, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 27, 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.