Expired Canadian patentCanada
Method and compositions for making liposomes
CA 1280975 C · Owner: Allergan, Inc. · Inventors: Park, John Y.; Thompson, Shurl A.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Mixtures of a hydrating agent such as arginine or glutamic acid and liposome-forming materials provide a pre-liposome gel which spontaneously forms highly stable liposomes in aqueous solution having very high capture efficiency. b6302G 16501
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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 March 5, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 5, 2008.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 17, 1986
GrantedMarch 5, 1991
Term endedMarch 5, 2008
Patent numberCA 1280975 C
Classification (IPC)A61K9/50 +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.