Crystalline cephem-acid addition salts and processes for their preparation
CA 1235690 A · Owner: Aventis Pharma Deutschland Gmbh · Inventors: Lattrell, Rudolf; Durckheimer, Walter
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 of the formula, (Ia), (Ib), and their hydrates processes for the preparation of the, acid addition salts pharmaceutical products containing, these compounds and processes for their preparation and, the use of the compounds for combating bacterial infections.
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 April 26, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 26, 2005.
- 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.