Process for producing powdery water-soluble polymer
CA 1066835 A · Owner: Kyoritsu Yuki Co. · Inventors: Ikeda, Kazuo; Suzuki, Masayuki; Uono, Masanori
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Title of the Invention:, PROCESS FOR PRODUCING POWDERY WATER-SOLUBLE POLYMER Abstract of the Disclosure, The aqueous gel of water-soluble acrylic polymer is mixed with a water-unsaturated salt such as anhydrous sodium sulfate, and the water component of aqueous gel is dehydrated as crystal water of said salt, then the polymer is easily powdered.
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 November 20, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 20, 1996.
- 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.