Structured packing element with bi-directional surface texture and a mass and heat transfer process using such packing element
CA 2204703 C · Owner: Air Products And Chemicals, Inc. · Inventors: Sunder, Swaminathan; Riska, Frank Jude; Pillarella, Mark Robert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides for a structured packing element the element being, corrugated with corrugations which form alternating peaks and troughs across the element the corrugations having a longitudinal axis the element having at least one band of first fluting at an angle between 0° and 180° to the longitudinal axis of the corrugations and at least one band of second fluting at an angle between 0° and 180° to the longitudinal axis of the corrugations, the first fluting being at an angle greater than zero to the second fluting. The element preferably has a plurality of holes through the element. The foregoing structured packing is suited for use in processes requiring a contact …
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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 May 7, 1997 and granted January 23, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 7, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 7, 2019.
- 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.