Pyridothienopyridazine compounds
CA 1202306 A · Owner: Usv Pharmaceutical Corporation · Inventors: Youssefyeh, Raymond D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Provided are pyridothienopyridazine compounds of the formula, wherein, R1 is alkyl, alkenyl alkynyl, halogen, nitro, cyano, carboxy carboxyalkyl, carbalkoxy, alkanoyl, trihalomethyl, aryl, aralkyl, mercapto, mercaptoalkyl alkyl-, mercapto, hydroxy, hydroxyalkyl alkoxy, acyloxy, amino, aminoalkyl, alkylamino sulfinyl, sulfonyl or methylene-, dioxy m is an integer from 0 to 2 inclusive; n is an integer from 0 to 3 inclusive; R2 and R3 are independently hydrogen, alkyl alkenyl, alkynyl, hydroxy, hydroxyalkyl alkoxy, acyloxy, halogen, amino, aminoalkyl alkylamino, alkanoylamino, mercapto, mercaptoalkyl alkylmercapto, carboxy, carbalkoxy, alkylsulfinyl, alkylsulfonyl, arylsulfinyl or …
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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 March 25, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 25, 2003.
- 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.