Expired Canadian patentCanada
Alkyl ethers of hydroxycumene and process for their preparation
CA 559076 A · Owner: Shawinigan Chemicals Limited · Inventors: Shaw, Thomas P. G.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
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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 17, 1958. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 17, 1975.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 17, 1955
GrantedJune 17, 1958
Term endedJune 17, 1975
Patent numberCA 559076 A
Classification (IPC)C07C41/00 +1 more
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.