Biaxially-oriented polypropylene film with high mechanical strength
CA 2020003 C · Owner: Wilhelm, Thomas · Inventors: Muskalla, Winfried; Crass Guenther; Wilhelm, Thomas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A biaxially-oriented film with high, mechanical strength which includes 69 to 94.99% by, weight of a polyolefin 5 to 30% by weight of a, natural or synthetic resin having a softening point in the range from 70 to 170°C, and 0. 01 to 1% by weight of a nucleating agent, based on the total weight of the film. A method for producing this film includes biaxially drawing the film at temperatures below the melting point of the polyolefin.
Read the whole patent
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, 1990 and granted January 18, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 27, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 27, 2012.
- 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.