Development control system
CA 2173448 C · Owner: Lior, Ishaiau · Inventors: Chatow, Ehud; Lior, Ishaiau; Lavon, Amiran
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Toning apparatus (23) for toning an electrostatic latent image, having image and background portions at different potentials on an imaging surface (16). The apparatus comprises an endless toning surface (21) coated with a layer of concentrated liquid toner and engaging the imaging surface (16) at a toning region. The apparatus additionally comprises a source of voltage connected to the toning surface (21) and electrifying the toning surface (21) to a voltage operative to selectively transfer at least a portion of the layer to image portions on the imaging surface (16). A developed mass per unit area (DMA) controller having an input indicative of the DMA on the imaging surface (16) is …
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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 February 3, 1994 and granted August 19, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 3, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 3, 2016.
- 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.