Crystalline hydrochloride of new beta-lactam antibiotic and process therefor
CA 2034592 C · Owner: Eli Lilly And Company · Inventors: Pfeiffer, Ralph R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The crystalline hydrochloride of the antibiotic 7.beta.-2'-(R)-2'-phenyl-2'-aminoacetamido-3-chloro-3-(1carbadethiacephem)-4-carboxylic acid ("LY163892") is described. The crystalline hydrochloride is an antibiotic in its own right and is a valuable intermediate to the corresponding monohydrate form of LY163892. A process for preparing LY163892 crystalline hydrochloride is also provided.
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 January 18, 1991 and granted June 5, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 18, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 18, 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.