Alkanophenones
CA 1340463 C · Owner: Ciba-Geigy Ag · Inventors: Beck, Andreas; Von Sprecher, Andreas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
1-, Substituted alkanophenones of general formula in which R1 is unsubstituted or fluorinated lower alkyl R2 is, hydrogen, or unsubstituted or fluorinated lower alkyl or lower alkenyl X is lower alkylene, oxy, thio or a direct bond alk is lower alkylene, n is 1 or 2, R3 is phenyl that is unsubstituted or is substituted by unsubstituted or fluorinated lower alkyl by etherified or esterified, hydroxy, by unsubstituted or lower alkylated amino and/or by free esterified or amidated carboxy, or is lower alkyl that is unsubstituted or fluorinated or substituted by free, esterified or amidated carboxy R4 is free, esterified or amidated carboxy or 5-tetrazolyl and R5 is, hydrogen or lower alkyl, …
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 March 23, 1999. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 23, 2016.
- 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.