Expired Canadian patentCanada
Toner compositions
CA 2279437 C · Owner: Bertrand, Jacques C. · Inventors: Pickering, Thomas R.; Ciccarelli, Roger N.; Bertrand, Jacques C.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A toner comprised of binder, colorant, and a silica containing a coating of an alkylsilane.
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 30, 1999 and granted May 28, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 30, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 30, 2021.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 30, 1999
GrantedMay 28, 2002
Term endedJuly 30, 2019
Patent numberCA 2279437 C
Classification (IPC)G03G9/09
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.