Plastic compositions and method
CA 1111173 A · Owner: Northern Illinois Research Inc. · Inventors: Etes, Donald E.; Finch, James D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A plastic composition prepared by the reaction of a non-ionic water soluble acrylic polyelectrolyte and a cationic water soluble acrylic polyelectrolyte with propylene glycol and incorporating or conducting the reaction in the presence of polyvinyl pyrrolidone with or without water. In one embodiment a plastic composition adapted for use in contact with the skin especially in the form of a pad, seal or bandage is prepared by reacting a mixture of: 1) acrylamide-beta methacrylyloxyethyl trimethyl ammonium sulfate copolymer; 2) polyacrylamide; 3) propylene glycol; and 4) polyvinyl pyrrolidone. The plastic composition can contain glycerin in varying amounts to enhance the "feel" and …
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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 October 20, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 20, 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
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.