Derivatives of 5-carboxyalkyl-2-iminobarbituric and 5-carboxyalkyl-2-thioxobarbituric acid
CA 1051894 A · Owner: Spofa, United Pharmaceutical Works · Inventors: Pujman, Vojtech; Cerny, Antonin; Kotva, Rudolf
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Derivatives of 5-carboxyalkyl-2-iminobarbituric and 5-carboxyalkyl-2-thioxobarbituric acids having the general, formula:, (I), wherein R1 represents a hydrogen atom or a straight or branched chain alkyl group containing 1 to 7 carbon atoms R2 represents, hydrogen or a straight or branched chain alkyl group containing 1 to 5 carbon atoms, R3 represents hydrogen a straight or, branched chain alkyl group containing 1 to 5 carbon atoms or, an aryl group, R4 represents an imino group or a sulphur atom and n is 0 or an integer ranging from 1 to 6; and their pharmaceutically acceptable salts. These compounds are therapeutically useful in the treatment of animals with transplantable tumours.
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 April 3, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 3, 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.