Toner dispensing cartridge having a nonrotatable toner cup and a rotatable sleeve-cap
CA 2189583 C · Owner: International Communication Materials, Inc. · Inventors: Weed, John M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A toner dispensing cartridge having a hollow toner cap with an open end portion to which a sleeve-cap is fitted. The sleeve-cap has at least one opening forming a mouth portion. The sleeve-cap is rotatable relative to the hollow toner cup. An agitator element disposed within the hollow toner cup is connected to and rotatable by the sleeve-cap. With the hollow toner cup stationary rotation of the sleeve-cap, causes the agitator element to displace toner contained within the cartridge toward the mouth portion of the cartridge for egress of the toner through the mouth portion to toner receiving apparatus.
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 March 15, 1996 and granted November 14, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 15, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 15, 2018.
- 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.