Preparation of water soluble cationic polymer and product
CA 1261099 A · Owner: S.N.F. · Inventors: Larson, Eric H.; Cadel, Jeffrey S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Use of a dicarboxylic acid in the preparation of cationic water soluble polymers useful in flocculation of suspended solids in various waste waters is disclosed. The dicarboxylic acids are shown to improve stability of cationic functionality and enhance distribution of charge.
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 September 26, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 26, 2006.
- 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.