Extraction apparatus for bulk material containers
CA 2189075 C · Owner: Wilhelm, Klaus · Inventors: Fritz, Walter; Wilhelm, Klaus
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved extraction apparatus for bulk material containers, in particular for bins (1) filled with a pourable bulk material (3) , comprises a suction head which can be lowered onto the bulk material (3). According to the improvement provision is made, for the suction head (10) to be provided with a float (11), floating in or on the bulk material (3) and to be, held above it, and for the oscillation control device (35) to be arranged in such a way that the suction head (10) and/or the float (11) can be caused at least indirectly to oscillate.
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 October 2, 1995 and granted December 18, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 2, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 2, 2017.
- 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.