Method for the fractional condensation of a hot gas mixture containing acrylic acid or methacrylic acid and having a high proportion of non-condensable constituents
CA 2303373 A1 · Owner: Thiel, Joachim · Inventors: Proll, Theo; Eck, Bernd; Brollos, Klaus
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a method for the fractional condensation of a gas mixture which contains at least one other condensable constituent in addition to acrylic acid or methacrylic acid and which also has a high proportion of one or several non-condensable constituents. According to said method the gas , mixture is passed through a column with separation-efficient baffles and the condensable constituents are condensed out by cooling.
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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 September 10, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 10, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 10, 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.