Forming microporous polymeric articles by solvent extraction of one polymer
CA 1315930 C · Owner: Dubrow, Robert S. · Inventors: Dubrow, Robert S.; Froix, Michael F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Title: POLYMERIC ARTICLES AND METHODS OF MANUFACTURE THEREOF Abstract, Method for the preparation of an article from a blend of at least two molecularly compatible polymer by treating, the blend with a solvent which is a solvent for one of the polymers and a non-solvent for the other. The solvent can be removed while the article is restrained from undergoing substantial shrinkage in which case a microporous article is obtained. Alternatively, the solvent can be removed while the article is permitted to shrink In this case high shrinkage force, (also referred to as recovery force) results which can be utilized to apply the article to a substrate. The final and intermediate articles are …
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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 April 13, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 13, 2010.
- 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
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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.