Expired Canadian patentCanada
Silicate fouling control during dihydric alcohol production
CA 1108191 A · Owner: Basf Wyandotte Corporation · Inventors: Kersten, Siegfried P.; Panek, Edward J.; Moll, Werner O.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Silicate fouling on the reboilers and trays and the distillation train used for the production of dihydric alcohols is arrested by the addition of caustic to the feed stream.
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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 September 1, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 1, 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.
FiledMarch 23, 1979
GrantedSeptember 1, 1981
Term endedSeptember 1, 1998
Patent numberCA 1108191 A
Classification (IPC)C07C31/20 +2 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.