Methods for manufacturing molded sheets having a high starch content
CA 2248982 C · Owner: Anderson, Per J. · Inventors: Anderson, Per J.; Hodson, Simon K.; Ong, Shaode
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compositions and methods for manufacturing sheets having a starch-bound matrix reinforced with fibers and optionally including an inorganic mineral filler. Suitable, mixtures for forming the sheets are prepared by mixing together water unmodified and, ungelatinized starch granules a cellulosic ether, fibers, and optionally an inorganic mineral, filler in the correct proportions to form a sheet having desired properties. The mixtures are, formed into sheets by passing them between one or more sets of heated rollers to form green, sheets. The heated rollers cause the cellulosic ether to form a skin on the outer surfaces of, the sheet that prevents the starch granules from causing the …
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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 9, 1997 and granted July 30, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 9, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 9, 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.