Porous hydrophilic polypropylene membrane, method for production thereof, and blood plasma separation apparatus
CA 1325405 C · Owner: Seita, Yukio · Inventors: Masuoka, Toshio; Seita, Yukio; Onishi, Makoto
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A porous hydrophilic polypropylene membrane possessing a fine reticular structure, which is characterized by the fact that at least either of the opposite surfaces of membrane forms a surface layer of a reticular structure substantially equal to that in the interior of membrane, the membrane surfaces and the surfaces of pores in the membrane have a hydrophilic polymer chemically bonded thereto, and the membrane is composed substantially of a polypropylene possessing an average pore diameter in the range 0.1 to 2.0 µm a, bubble point of not more than 2.0 kg/cm2 a porosity in, the range of 60 to 85%, and a water permeability of not less than 2 ml/min.mmHg.m2, a method for the production …
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
- Granted December 21, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 21, 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
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.