Improved paper coating composition
CA 2017574 C · Owner: Protein Technologies International, Inc. · Inventors: Coco, Charles E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved process of cast coating and the coating-composition used therein produces a paper coating which has ~exceptional brightness, gloss, smoothness, flexibility resistance to drum, adhesions and pick resistance. The paper coating is especially effective in cast coating where extremely high smoothness and gloss is essential. The paper coating composition utilizes soy protein binder which has been modified by copolymerization to add a synthetic component to modify the properties of the soy protein.
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
- Filed May 25, 1990 and granted October 2, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 25, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 25, 2012.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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.