Toner resin
CA 2056178 A1 · Owner: Takahiro, Syuji · Inventors: Itoh, Masahiro; Takahiro, Syuji; Ito, Hirokazu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A toner resin, which comprises a styrene component an acrylic acid ester component and/or methacrylic acid ester component, and a divinyl monomer component wherein, the glass transition temperature is 50 to 68°C and the tan .delta. which is the ratio of the dynamic loss to the dynamic elastic modulus is 0.3 to 0.7 as measured at 200°C, a toner having an excellent fixing property non-, offsetting property, and blocking resistance and able to, be used with a high-temperature high-speed copying machine, is formed from this toner resin.
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 November 26, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 26, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 26, 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.