Determining the rate at which material is received by an extruder from a feed container
CA 2061393 C · Owner: Saatkamp, Richard · Inventors: Saatkamp, Richard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of determining the rate at which plastic granules are received by an extruder from a feed container having an outlet which opens into the inlet of the extruder. In which method granules are continuously fed to a supply container and consecutive charges of granules are intermittently fed to the feed container. The feed container is weighed before or at the beginning of or after or at the end of its filling operation. The time required to withdraw the material in the amount which has been determined by the weighing operations is measured and the, flow rate of the material is calculated from the amounts of material which have been received from the feed container in the measured …
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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 18, 1992 and granted October 3, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 18, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 18, 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.