Mixed-resistance structured packing
CA 2292131 C · Owner: Air Products And Chemicals, Inc. · Inventors: Sunder, Swaminathan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A layer of mixed-resistance structured packing includes: a first structured packing, having a first packing resistance; and a second structured packing generally horizontally, adjacent the first structured packing the second structured packing having a second, packing resistance different than the first packing resistance. The layer of mixed-resistance, structured packing is used in exchange columns for exchanging heat and/or mass between, a first phase and a second phase in processes such as cryogenic air separation. Use of, the layer of mixed-resistance structured packing reduces HETP (height equivalent to a, theoretical plate) in the exchange columns and processes. A method also …
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 13, 1999 and granted May 27, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 13, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 13, 2021.
- 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.