Process for transforming by-products formed at low boiling points during thermal cracking of 1,2-dichloroethane
CA 2199992 C · Owner: Daire, Sylvie · Inventors: Daire, Sylvie
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention concerns a process for transforming light by-products formed during thermal cracking of 1,2-dichoroethane. The procedure which can be used in producing vinyl chloride involves chlorinating the light by-products right after processing the 1,2-dichloroethane in the presence of products resulting from that processing of 1,2-dichloroethane.
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
- Filed March 13, 1997 and granted January 8, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 13, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 13, 2019.
- 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.