Water absorbing polymers
CA 1293351 C · Owner: Farrar, David · Inventors: Flesher, Peter; Farrar, David; Skinner, Malcolm
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Water Absorbing Polymers, A wet particulate mass is converted to a crumbly state by mixing into the mass water absorbent synthetic polymer paricles, for instance cross linked sodium polyacrylate, which are either in the form of aggregates above 50µm formed from fines below 50µm or are in the form of a dispersion in water immiscible liquid of particles below 50µm.
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 December 24, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 24, 2008.
- 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.