Protein adhesive binder and process for forming a protein adhesive binder
CA 2201447 C · Owner: Scacciaferro, Lawrence M. · Inventors: Krinski, Thomas L.; Scacciaferro, Lawrence M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A protein adhesive is provided for use as an adhesive binder in a paper coating composition. The protein adhesive contains a protein material a divalent dispersing, agent, preferably an alkaline earth oxide or alkaline earth hydroxide and a cation, binding agent. The protein material is effective for use as an adhesive binder. The dispersing agent is combined with the protein material in an amount effective to adjust the pH of an aqueous solution of the protein material sufficiently to substantially solubilize the protein material. The cation binding agent is combined with the protein material and the dispersing agent in an amount effective to inhibit cation induced protein gel formation in …
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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
- Filed April 1, 1997 and granted December 2, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 1, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 1, 2019.
- 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.