Acidic indole compounds and their use as antiallergy agents
CA 1259317 A · Owner: Warner-Lambert Company · Inventors: Stabler, S. Russell; Connor, David T.; Unangst, Paul C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel acidic indole compounds having use as antiallergic asents, methods of synthesis compositions, and, uses are claimed. The novel compounds have the structure: I, wherein R1 to R4 and Q are as defined in the disclosure and claims.
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 September 12, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 12, 2006.
- 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.