.beta.-lactam antibiotics
CA 1338670 C · Owner: E.R. Squibb & Sons, Inc. · Inventors: Floyd, David Mack; Parker, William Lawrence; Cimarusti, Christopher Michael
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
beta.-Lactams having a sulfonic acid substituent in the 1position and an amine function in the 3-position and having the formula:, wherein R1 is H or acyl derived from a carboxylic acid; R2 is H or alkoxy; R3 and R4, the same or different are H, alkyl, cycloalkyl, phenyl or substituted phenyl or one of, R3 and R4 is H and the other is alkoxycarbonyl alken-1-yl, alkyn-1-yl, 2-phenylethenyl or 2-phenylethynyl; and X is H or SO3X is SO3?M? wherein M?is a cation and the use of, said .beta.-lactams as antibiotics.
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 October 22, 1996. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 22, 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.