Barrel injector screw
CA 2014495 C · Owner: Koenig, Larry · Inventors: Koenig, Larry
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An auger shredder and feeder system which includes a primary housing for receiving material to be ground and shredded, a primarily auger rotatably mounted within a grinding chamber formed in the housing an extrusion tube, for receiving material ground and shredded within said grinding chamber, a secondary housing having a generally tubular side wall and communicating with the extrusion tube and a secondary auger rotatably mounted within the secondary housing. Material deposited in the primary housing is crushed and shredded, then pumped by the primary auger through the extrusion tube where forms a plug of material. As the plug progresses into the secondary housing it is, further shredded …
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 April 12, 1990 and granted November 9, 1993. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 12, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 12, 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.