15-deoxyspergualin suppository
CA 2048856 C · Owner: Nippon Kayaku Kabushiki Kaisha · Inventors: Okuma, Takaaki; Hiraga, Hironobu; Umeda, Yoshihisa
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A 15-deoxyspergualin suppository containing .beta.-form crystals of 15-deoxyspergualin trihydrochloride and a lipophylic base can give high plasma concentration of the drug when administered, and has good stability and low hygroscopicity.
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
- Filed August 9, 1991 and granted May 1, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 9, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 9, 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.