6-(aminomethyl)penicillanic acid 1,1-dioxide esters and intermediates therefor
CA 1206957 A · Owner: Pfizer Limited · Inventors: Barth, Wayne E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
6-(AMINOMETHYL)PENICILLANIC ACID l,l-, DIOXIDE ESTERS AND INTERMEDIATES THEREFOR Abstract, 6-alpha- and 6-beta-(Aminomethyl)penicillanic acid l,l-dioxide esters which are hydrolyzable under physiological conditions, particularly those wherein the ester radical is lH-isobenzofuran-3-on-l-yl or (5-methyl-l,3-dioxol-2-on-4-yl)methyl, and an improved process and intermediates used in their synthesis.
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
- Granted July 2, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 2, 2003.
- 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.