Derivatives of guanine
CA 1285560 C · Owner: Astra Lakemedel Aktiebolag · Inventors: Johansson, Karl Nils-Gunnar; Lindborg, Bjorn Gunnar; Noren, Jan-Olof
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Antivirally active compounds of the formula I, wherein A is , (Aa) or, (Ab), wherein m is 1 or 2 n is 1 or 2, whereby m is 1 when n is 2 and m is 2 when n is 1 R? is (CH2)pOH, NHCONH2 or COR?, R? is hydrogen hydroxy or amino, p is 1 to 4, R? and R? are independently selected from hydrogen or (CH2)pOH with the proviso that at least one of R? or R? is hydrogen; or R? and R? together constitute an additional carbon-carbon bond to form an alkyne; or a physiologically acceptable salt geometric or optical isomer thereof; processes for preparation of said compounds, pharmaceutical preparations containing the compounds, methods for treatment of virus infections and the medical use of the compounds.
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 July 2, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 2, 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.
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.