Dideoxy-l-arabinitol derivatives as antiviral compounds
CA 2002105 C · Owner: G.D. Searle And Co. · Inventors: Koszyk, Francis J.; Mueller, Richard A.; Partis, Richard A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel antiviral compounds are disclosed having the following formula, wherein R1 is C1-C14 alkyl or C1-C14 hydroxyalkyl or C3-C12 alkanoyl or a substituted or unsubstituted aryl radical having six to ten carbon atoms; and wherein R2, R3 and R4 are the same or different and each is H or acyl having one to six carbon atoms; provided, however, that when R2, R3 and R4 are each H, then R1 is C4-C9 alkyl or C2-C5 hydroxyalkyl or C3-C12 alkanoyl.
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 2, 1989 and granted January 19, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 2, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 2, 2011.
- 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.