Diallyl dimethyl ammonium chloride polymerization and products
CA 1060597 A · Owner: Nalco Chemical Company · Inventors: Connelly, Lawrence J.; Hurlock, John R.; Ballweber, Edward G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The preparation of homopolymers of diallyl dimethyl ammonium chloride (DADMAC) and copolymers thereof with acrylamide utilizing a waterin-oil emulsion polymerization technique to produce extremely stable polymer latices and subsequently inverting these emulsions in water preferably, with a suitable hydrophilic and water-soluble surfactant. These materials find use as coagulants in water clarification procedures.
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 August 14, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 14, 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.