Recovery of reactants and products in production of alkenyl bridged ring compounds
CA 2180292 C · Owner: Exxonmobil Chemical Patents, Inc. · Inventors: Sanchez, Leonel Eduardo; Devoy, Bruce Charles; Becker, Christopher Lynn
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a method for using a distillation column to recover the reactants and products from the reaction of a cyclic diolefin and an olefin to produce an alkenyl bridged ring compound. In a second embodiment a pre flash column may be used to, improve recovery.
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 30, 1994 and granted February 5, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 30, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 30, 2016.
- 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.