Development system
CA 2077817 C · Owner: Floyd, Lawrence Jr. · Inventors: Floyd, Lawrence Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus for developing an electrostatic latent image on an image support surface. A rotating advancing member advances single component developer material from a chamber to an intermediate donor roll. The intermediate donor roil transports a metered amount of developer material to the latent image where the developer material is attracted to the latent image for development thereof. The intermediate donor roll provides a means for preventing escape of developer material from the chamber to increase the life of mechanical components and to decrease background.
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 September 9, 1992 and granted April 4, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 9, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 9, 2014.
- 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.