2-aminopurine derivatives having anti-viral activity
CA 1262899 C · Owner: Harnden, Michael Raymond · Inventors: Harnden, Michael Raymond; Jarvest, Richard Lewis
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A compound of formula, or a salt thereof wherein R1 and R2 are each, independently hydrogen acyl or phosphate, provided, that when one of R1 or R2 is phosphate the other is, hydrogen; or R1 and R2 are joined together to form a cyclic acetal group, a cyclic carbonate group or a cyclic phosphate group, processes for their preparation and their use as pharmaceuticals in the treatment of viral infections.
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
- Granted November 14, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 14, 2006.
- 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.