Process for making ether sulfonates
CA 1095929 A · Owner: Texaco Development Corporation · Inventors: Watts, Lewis W. Jr.; Yeakey, Ernest L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
PROCESS FOR MAKING ETHER SULFONATES, (D#75,333-F) ABSTRACT OF THE DISCLOSURE, Covers a method of preparing ether sulfonates from alkoxylated alcohols by reacting said alkoxylated alcohol with an allyl halide in presence of a base to produce an allyl ether and reacting said allyl ether with sodium bisulfite to produce said ether sulfonate. -I-
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
- Granted February 17, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 17, 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.
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.