Polymer composition and a method for producing packing materials with controllable decomposition
CA 2470306 A1 · Owner: Angelov, Drasimir Ivanov · Inventors: Angelov, Drasimir Ivanov; Georgiev, Ivan Vasilev
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The polymer composition is used for packing products of the chemical food and , other industries. The packing material obtained from the polymer composition has a wide range of application and controllable decomposition of the packages in water medium, ensuring environmental cleanness and recycling of the material.The polymer composition for packing materials contains polyvinylalcohol and water, and, according to the invention it also contains , polyvinylacetate dispersion methylcellulose, carboxymethylcellulose and glucose in the following proportions of the components in % by weight: polyvinylalcohol 32 - 84, polyvinylacetate dispersion 10- 57 methylcellulose , 3.0 - 5.8, …
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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 June 27, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 27, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 27, 2024.
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.