Xanthine derivatives
CA 1289954 C · Owner: Kis, Zoltan L. · Inventors: Kis, Zoltan L.; Morley, John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Case 100-6955, ABSTRACT, A compound of formula I (I), wherein R1 is C1-4alkyl, C3-4alkenyl or (C3-5cycloalkyl)-methyl R2 is C1-4alkyl, hydroxy- or (C1-4alkoxy)-substituted C1-3alkyl-methyl, (C3-5cycloalkyl)-methyl tetrahydrofuran-, 2-yl-methyl or 1,3-dioxolan-2-yl-methyl R3 and R4 are each, hydrogen, hydroxymethyl methoxymethyl or N,N-dimethylcarba-, moyloxymethyl R5 is hydroxy or methoxy, R6 is hydrogen hydroxy, methoxy or halogen and R7 is in the 2- or 3-position and is hydroxy, methoxy or halogen, or together with R5 is 3,4-methylendioxy, or together with R6 is 2,3-methylenedioxy and their physiologically-hydrolysable and -acceptable esters are useful in the treatment (symptomatic and …
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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 October 1, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 1, 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.