Substituted azetidinone compounds
CA 1270097 C · Owner: Yamamoto, Minoru · Inventors: Iwamoto, Hidenori; Yoshida, Makoto; Tamura, Toshinari
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Substituted Azetidinone Compounds The present invention relates to substituted azetidinone compounds, their preparation, and medicaments containing them. More particularly the present invention relates to compounds shown by general formula (I):, (I), wherein one of R1 and R2 represents a substituted lower alkyl group, an azido group, an amino group, a lower acylamino group a mercapto group or a lower alkylthio group and the other represents a hydrogen group, or, both represent hydrogen atoms or lower alkyl groups; R3 represents a hydrogen atom or a group shown by formula: (wherein X represents , or, (wherein R5 represents a hydrogen atom or a lower alkyl group) and Y represents a hydroxy …
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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 June 5, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 5, 2007.
- 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.