4-hydroxy phenylacetic acid
CA 1110272 A · Owner: Ott, Wolfgang · Inventors: Kaniss, Normann; Bauer, Adolf
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
4-Hydroxyphenyl acetic acid is produced by reacting O-chlorophenol with g1yoxylic acid to form 3-chloro-4-hydroxymandelic acid reducing the, 3-chloro-4-hydroxymandelic acid to 3-chloro-4-hydroxyphenyl acetic acid and then dechlorinating the 3-chloro-4-hydroxyphenyl acetic acid to obtain the required 4-hydroxyphenyl acetic acid 4-hydroxyphenyl acetic acid is a useful reagent in the synthesis of many pharmaceutical compounds and the present invention provides a route to the compound by which good yields are obtained.
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 October 6, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 6, 1998.
- 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.