Hydroxymethyl cyclobutyl purines
CA 1340496 C · Owner: Slusarchyk, William A. · Inventors: Slusarchyk, William A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Antiviral activity is exhibited by compounds having the formula, (see fig. I), and their pharmaceutically acceptable salts. R1 is (see fig. II), (see fig. III), (see fig. IV) (see fig. V), (see fig. VI), (see fig. VII) (see fig. VIII), (see fig. IIX), (see fig. IX) (see fig. X), (see fig. XI), R2 is hydrogen -PO3H2, wherein R3 is, hydrogen, alkyl substituted alkyl, or, aryl, and R4 is alkyl.
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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 April 13, 1999. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 13, 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.
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.