Machine for measuring sizes of particles and for determining color differences in a substance
CA 2249175 C · Owner: Engel, Michael H. · Inventors: Engel, Michael H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A machine is described for performing a draw-down operation in which a carriage for supporting a scraper is mounted on the base so as to travel along it an electric motor is, coupled to the carriage for moving it and a scraper is pivotally mounted on said carriage with a means for pushing the scraper against the top of the base with a selectable force.
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 30, 1998 and granted December 26, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 30, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 30, 2020.
- 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.