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Expired Canadian patentCanada

Filter for separating substances having lipophilic and/or oleophilic and/or apolar properties from different liquids, gases and vapors

CA 1268718 C · Owner: Sorbent Products Co. Inc. · Inventors: Maurer, Gunter

CIPO record

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Abstract From the Canadian patent

A filter for separating substances having lipophilic and/or oleophilic and/or apolar properties, such as fats oils, substituted or unsubstituted hydrocarbons from different, liquids, gases and vapors such as water, (moist) air and, water vapor employing polyolefin fibers and/or filaments which have a diameter of 0.1 to 10 µm, and preferably 0.5 to 2 µm, as filter material. The filter material is present in the form of bands or strands which are of finite or infinite length, and which are formed from webs waddings or other, sheet-like structures made of such fine fibers and/or filaments and which are arranged with respect to each other in such a way that free openings and passages are in …

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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 May 8, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 8, 2007.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJanuary 7, 1986
GrantedMay 8, 1990
Term endedMay 8, 2007
Patent numberCA 1268718 C
Classification (IPC)B01D39/16 +2 more

Timeline

Timeline From CIPO dates

1987199019931996199920022005Application filedJan 7, 1986Patent grantedMay 8, 1990Term endedMay 8, 2007

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.