Thioformamide derivatives
CA 2073240 A1 · Owner: Rhone-Poulenc Rorer S.A. · Inventors: Palfreyman, Malcolm Norman; Vicker, Nigel
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Thioformamide derivatives of formula (I) in which R represents, alkyl, Y represents methylene ethylene or a direct bond, A, represents optionally substituted phenyl or heterocyclyl and: R1 represents hydrogen, and R2 represents an N-alkylsulphonyl- or N-phenylsulphonyl-N'-alkylamidino or an aryl- or alkylsulphonyl group; R1 and R2 both independently represents alkyl- or aryl-sulphonyl groups; or R1 and R2 form together with the nitrogen atom a 3,5-dioxomorpholino group or analogue thereof; and salts thereof possess pharmacological activity and are also useful in inhibiting head hair loss.
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
- Filed January 8, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 8, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 8, 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.