Material exchange column with a packing
CA 2246828 C · Owner: Moser, Felix · Inventors: Heiniger, Fritz; Hug, Albert; Moser, Felix
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The material exchange column (1) contain; a packing (2) which can be installed in the horizontal position of the column. The column has a ring gap (12) between the packing and the column wall (10) in which collars (3) are arranged. The latter each comprise a band shaped region (30) which lies in contact with the packing. At the upper edge of the band-shaped collar regions there adjoin spring-elastically connected surface pieces (31) which produce a bridge to the wall (10) and which are provided for a return conduction of the liquid from the wall to the packing during the operation of the column. It applies at least for some of the collars that the latter have elevations (4) in their band …
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 8, 1998 and granted July 2, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 8, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 8, 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.