Crystalline cephem acid addition salts and processes for their preparation
CA 2018794 C · Owner: Durckheimer, Walter · Inventors: Mencke, Burkhard; Durckheimer, Walter; Isert, Dieter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Crystalline cephem acid addition salts and processes for their preparation, Crystalline cephem acid addition salts of the general formula II, pharmaceutical preparations effective against bacterial infections which contain such cephem derivatives processes , for the preparation of the cephem derivatives and the pharmaceutical preparations, and the use of the cephem derivatives for combating bacterial infections.
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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 June 12, 1990 and granted May 16, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 12, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 12, 2012.
- 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.