Process for the preparation of bicycloheptane derivatives, and bicycloheptane derivatives
CA 1255320 A · Owner: Shell Canada Limited · Inventors: Payne, George B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for the preparation of a 2-exo-hydroxy-7-oxabicyclo2.2.1heptane, wherein the corresponding cis 3,4-expoxycyclohexanol is cyclised by treatment with an acid in an inert, solvent. These compounds find use as intermediates in processes for the preparation of herbicides, in which the 2-exo-hydroxy group is converted into an ether, for example to provide the corresponding 2-exo-benzyloxy compound.
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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
- Granted June 6, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 6, 2006.
- 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.