Starch/latex cast coatings for paper
CA 1092737 A · Owner: Champion International Corporation · Inventors: Craig, Gerald; Evans, Wilbur G.; Potts, Everett L. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A non-proteinaceous binder is provided for cast coating of paper which comprises three primary components; a modified starch; a styrene-butadiene latex characterized by a particle size of about 800 to about 1300 angstroms a solids content of, between about 45.0 and about 47.0% a maximum 200 mesh residue of, about 0.075 gms./900 mls. a pH of between about 3.8 and 4.8 a, maximum Brookfield viscosity of about 100 and a surface tension of, between about 43.0 and about 49.0; and a second styrene-butadiene latex characterized by a particle size of about 1350 to about 1650 angstroms, a solids content of between about 47.0 and about 49.0% a maximum 200 mesh residue of about 0.05 gms./900 mls. a pH …
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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 December 30, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 30, 1997.
- 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.