Method for inhibiting adsorption of container-derived contaminants on drugs and contamination-inhibitory containers
CA 2207041 C · Owner: Izumi, Masamitsu · Inventors: Izumi, Masamitsu; Hayashi, Satoru; Inoue, Fujio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention provides a method for inhibiting adsorption of container-derived contaminants on a powdery or solid drug which comprises establishing a lower alcohol vapor phase within a container made at least in, part, of rubber or a plastic material. The method inhibits adsorption of container-derived substances on a drug to preclude development of insoluble particulate matter owing to said adsorption in an aqueous solution prepared extemporaneously without causing loss of the drug and avoiding the toxic effect of decomposition or degradation of the drug, thus insuring a long-term trouble-free stable shelf-life of the drug.
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 December 4, 1995 and granted January 29, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 4, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 4, 2017.
- 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.