Benzothiazepine derivatives
CA 1338417 C · Owner: E.R. Squibb & Sons, Inc. · Inventors: Atwal, Karnail Singh; Floyd, David Mack
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Calcium channel blocking activity is, exhibited by compounds having the formula or a pharmaceutically accpetable salt thereof wherein the stereochemistry at the chiral centers in the 2 and 3-positions of the benzothiazepine nucleus is cis, and wherein R1 is alkyl, aryl, arylalkyl, alkenyl or alkynyl;, R2 and R5 are each independently hydrogen alkyl of 1 to 4 carbon atoms, alkoxy of 1 to 4 carbon atoms, halogen or trifluoromethyl; and R3 and R4 are each independently alkyl or cycloalkyl or R3 and R4 together with the nitrogen atom to which they are attached are pyrrolidinyl, piperidinyl or morpholinyl.
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 June 25, 1996. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 25, 2013.
- 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.