Cyclicdihydroxy compounds
CA 2000512 A1 · Owner: Taylor, Stephen C. · Inventors: Taylor, Stephen C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract, "Cyclicdihydroxy Compounds" Novel substituted cis-1,2-dihydroxy-cyclohexa-3,5-diene compounds, useful as intermediates in the production of phenols and catechols for use as intermediates in the production of drugs herbicides, insecticides and as chiral synthons in particular, benzyl acetate cis glycol. A process for producing the novel compounds is also claimed.
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 October 12, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 12, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 12, 2011.
- 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.