Porous polypropylene hollow fiber membrane, method for production thereof and artificial lung
CA 1310160 C · Owner: Terumo Kabushiki Kaisha · Inventors: Seita, Yukio; Nagaki, Shoichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A flat-film type porous polypropylene membrane possessing a microreticular structure is disclosed which is characterized by the fact that either or both of the opposite surface region of the porous membrane forms a surface layer possessing an average pore diameter in the range of 0.1 to 5.0µm, a bubble point of not more than 2.0kgf/cm2, a porosity in the range of 60 to 85% and a, water permeability of not less than 100 m1/min.mmHg.m2 and the membrane possesses a wall thickness in the range of 30 to 300 µm. When this flat-film type porous polypropylene membrane is used for blood plasma separtion, it effects the blood plasma separated at a high speed and sparingly entails occlusion of blood …
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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 November 17, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 17, 2009.
- 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.