Microbial transformation process for antihypertensive products
CA 2041763 A1 · Owner: Merck & Co. Inc. · Inventors: Doss, George; Chen, Sheih-Shung T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Fermentation of the microorganism Actinoplanacete sp. in the presence of the Angiotensin II (A II) receptor antagonist 9/CSQl - i - 18119IA, yields a 5-hydroxymethyl and a 7-hydroxymethyl analog, both of which are also A II antagonists useful in the treatment of hypertension and congestive heart failure and other indications known to respond to A II antagonists.
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 May 3, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 3, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 3, 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.