Fast setting starch-based corrugating adhesive having partially hydrolyzed water soluble polyvinyl alcohol component
CA 1315435 C · Owner: Krankkala, Paul L. · Inventors: Krankkala, Paul L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Corrugating adhesives free of incompatibility problems with water soluble partially hydrolized polyvinyl alcohol comprise a major portion of water starch, strong base, a boric acid compound and a partially hydrolized water soluble polyvinyl alcohol composition.
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 March 30, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 30, 2010.
- 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.