Process for phosphorylating starch in alkali metal tripolyphosphate salts
CA 1098518 A · Owner: National Starch And Chemical Corporation · Inventors: Jarowenko, Wadym; Wurzburg, Otto B.; Patel, Jayant K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Starch is phosphorylated by an improved pollution-free process which involves forming a reagent solution of an alkali metal tripolyphosphate salt in water having 20 - 36% by weight of the salt dissolved therein, forming a starch cake containing no more than 45% by weight moisture, adding 2 - 30% by weight of the tripolyphosphate salt reagent solution to the starch cake, and drying and heat-reacting the thusimpregnated starch. In this process more efficient impregnation of the starch is achieved. The impregnation is preferably effected in a centrifuge.
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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 March 31, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 31, 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
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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.