Expired Canadian patentCanada
Amphiphilic imidazolinium derivatives
CA 2176713 C · Owner: Heath, Timothy D. · Inventors: Heath, Timothy D.; Solodin, Igor
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Amphiphiles containing an imidazolinium ring system are provided that are non-toxic to the host mammal. The amphiphiles are used to produce liposomes useful as carriers for delivering macromolecules intracellularly.
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 November 17, 1994 and granted February 22, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 17, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 17, 2016.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 17, 1994
GrantedFebruary 22, 2000
Term endedNovember 17, 2014
Patent numberCA 2176713 C
Classification (IPC)C12N15/88 +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.