Improved mixed aldehyde product separation
CA 2055233 C · Owner: Sorensen, Kirk D. · Inventors: Sorensen, Kirk D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for distilling a crude aldehyde product mixture of branched chain and straight chain aldehyde in a single distillation column to concurrently obtain three separate product streams i.e. a purified branched chain aldehyde stream and two different purified straight chain aldehyde streams.
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 November 8, 1991 and granted October 10, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 8, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 8, 2013.
- 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.