Toner image heat-fixing method
CA 2048036 C · Owner: Kohtaki, Takaaki · Inventors: Nagatsuka, Takayuki; Nakamura, Tatsuya; Kohtaki, Takaaki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A novel method for heat-pressure fixing color toner images in which:, (1) a toner is produced by suspension polymerization and contains a wax of a certain molecular weight and a certain melting point in a certain amount wherein the wax is enclosed in each particles by vinyl resin, and the THF soluble matters have specific molecular weight distribution; and, (2) a fixing means comprises a fixing roller and a pressure roller in mutual pressure contact and, through which the transfer medium comes out in the direction inclined toward the pressure roller wherein, the surface of the fixing roller comprises a fluorinecontaining material.
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 July 29, 1991 and granted October 4, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 29, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 29, 2013.
- 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.