Thiophene derivative and process for preparing the same
CA 1320964 C · Owner: Tanabe Seiyaku Co. Ltd. · Inventors: Inoue, Ichizo; Yamada, Kenji; Hayashi, Kimiaki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A thiophene derivative of the formula: (I), wherein R1, R2 and R3 each represent a lower alkyl group, Ring A is a substituted or unsubstituted phenyl group, X is -OCO-, -O- or -S-, m and n each represent an integer of zero or 1, and p and q each represent an integer of zero, 1 or 2, or a salt thereof and processes for preparing the same are disclosed. The thiophene derivative of formula (I) is useful as a gastrointestinal tract motility regulator.
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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 August 3, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 3, 2010.
- 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.