Thermoplastically workable starch and a method for the manufacture thereof
CA 2001587 C · Owner: Biotec Biologische Naturverpackungen Gmbh & Co. Kg · Inventors: Tomka, Ivan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In order to produce thermoplastically workable starch, an addition substance is admixed to a substantially native or natural starch and the mixture caused to melt by feeding of heat and mechanical energy. The addition substance is a substance which lowers the melting temperature of the starch so that the melting temperature of the starch together with this addition substance lies below the decomposition temperature of the starch, and furthermore the addition substance has a solubility parameter of more than 15 cal 1/2 cm -3/2. After the melting of the mixture of starch and addition substance, the melt is mixed until it is at least substantially homogeneous. The vapor pressure of 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 October 26, 1989 and granted December 14, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 26, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 26, 2011.
- 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.