Method for producing chemical compounds
CA 1180696 A · Owner: Leo Pharmaceutical Products Ltd. A/S (Lovens Kemiske Fabrik Produktionsa Ktieselskab) · Inventors: Godtfredsen, Wagn O.; Von Daehne, Welf
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Processes are provided herein for producing a crystalline hydrate of a salt of the antimicrobial agent 1,1-dioxopenicillanoyloxymethyl 6-(D-?-amino-?-phenylacetamido)penicillanate by specified alternative reactions with p-toluenesulfonic acid. More particularly the, tosylate mono- and dihydrates are provided. These tosylate hydrates are easily obtained in a crystalline state are devoid of organic solvent, residues show good stability on storage, and are effectively absorbed and hydrolyzed in vivo. Thus, they are specifically suitable for medical treatment of patients, in particular for oral administration.
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 January 8, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 8, 2002.
- 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.