Expired Canadian patentCanada
Antiviral purine derivatives
CA 1339818 C · Owner: Jarvest, Richard Lewis · Inventors: Jarvest, Richard Lewis; Harnden, Michael Raymond
Overview
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Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A compound of formula (I), (see fig. I) or a salt or acyl derivative thereof, in which X represents chlorine, C1-6 alkoxy, phenoxy phenyl C1-6, alkoxy, NH2, -OH or -SH, is useful in treating viral infections.
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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 14, 1998. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 14, 2015.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 16, 1984
GrantedApril 14, 1998
Term endedApril 14, 2015
Patent numberCA 1339818 C
Classification (IPC)C07D473/32 +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.