Liquid developer systems with self-replenishment of bulk conductivity
CA 2047675 C · Owner: Landa, Benzion · Inventors: Peled, Amnon; Almog, Yaacov; Landa, Benzion
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A self-replenishing liquid developer system for an electrostatic imaging system including an insulating non-polar carrier liquid. toner particles dispersed in the carrier liquid at least one charge director compound having a limited solubility in the carrier liquid and dissolved therein at its saturation concentration and excess ofthe at least one charge director compound comprised in a solid phase and being in equilibrium contact with the carrier liquid.
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 5, 1990 and granted August 11, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 5, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 5, 2012.
- 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.