Expired Canadian patentCanada
Stable solutions of oxytetracycline in aqueous 2-pyrrolidone
CA 1072012 A · Owner: Pfizer Limited · Inventors: Armstrong, William W.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Oxytetracycline aqueous solutions containing 2-pyrrolidone as a co-solvent suitable for pharmaceutical use and especially useful for either oral, topical or parenteral administration are disclosed.
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 February 19, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 19, 1997.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedFebruary 19, 1980
Term endedFebruary 19, 1997
Patent numberCA 1072012 A
Classification (IPC)A61K31/65 +2 more
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.