Thermal fixing developer material and wax for electrophotography
CA 2206973 A1 · Owner: Mitsui Chemicals, Inc. · Inventors: Sakai, Hideki; Ikeyama, Seiichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A thermal fixing developer material for electrophotography is provided. This developer material is adapted for use as a main component of an electrostatic toner, and the toner produced by using this developer material exhibits excellent release properties upon thermal fixing, and in particular, upon thermal fixing at low temperature, and therefore, is free from offset and contamination of carrier, photosensitive material heat, roller, and the like. Such a toner is also provided with high blocking resistance. The developer material of this invention comprises a wax of a propylene-based copolymer having a particular molecular weight, a particular melting point, and a particular compositional …
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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
- Filed June 3, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 3, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 3, 2019.
- 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.