Expired Canadian patentCanada
Ethylene glycol extraction process
CA 1076607 A · Owner: Union Carbide Corporation · Inventors: Bryant, David R.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There is described a process of extracting ethylene glycol from admixture with tetraglyme containing rhotium values therein using glycerine as the extraction solvent. S P E C I F I C A T I O N, 1.
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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 April 29, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 29, 1997.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedApril 29, 1980
Term endedApril 29, 1997
Patent numberCA 1076607 A
Classification (IPC)C07C31/20
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.