Method for filling particulate material into tubes
CA 2084261 C · Owner: Unidense Technology Gmbh · Inventors: Ryntveit, Gunne; Bayer, Kjell Roger
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a method for filling particulate material into vertical tubes. The particles are conveyed down into the tube along a line with a series of damper means arranged substantially transversely to the line and having a radial extension less than the tube's inner diameter. The line is pulled up gradually as the tube is filled with particles. The damper means can be in the form of brushes so flexible that they give gradually when the particles fall down on them. A wire can be used as the line, to which is fastened a series of substantially equidistant transversely extending brushes preferably consisting, of springs.
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 December 1, 1992 and granted February 15, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 1, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 1, 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.