Process for reducing the 2-dichlorobutadiene-(1,3) and benzene contents of 1,2-dichloroethane from 1,2-dichloroethane thermally cracked into vinyl chloride

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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 August 5, 1969. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 5, 1986.
• We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.