Biological materials
CA 1054521 A · Owner: Wellcome Foundation Limited (The) · Inventors: Schaeffer, Howard J.; Salvador De Miranda, Paulo M.; Hitchings, George H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Pharmaceutical preparations containing 9-(2-hydroxy -3-alkyl)adenine of formula I, (I), wherein R stands for an alkyl group having from 1 to 4 carbon atoms, inhibit adenosine deaminase. Adenosine deaminase enzyme acts on antiviral 9-.beta.-D arabinofuronosyl derivatives of 6-amino purine to inactivate them. Provided are pharmaceutical compositions comprising a compound of formula (I) together with a compound of formula (II), (II), wherein R1 is hydrogen amino, lower alkylamino or, hydroxyl, together with an acceptable carrier therefor.
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 May 15, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 15, 1996.
- 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.