Apparatus for, and methods of, operating upon a fluid
CA 1289894 C · Owner: Mehl, Ehrenfried L. · Inventors: Mehl, Ehrenfried L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, This invention provides a filter comprising a nonporous support member open at one end and a porous disc rigidly secured to the support member at an opposite preferably smaller, end. The disc may be formed from fibers preferably having a thickness of approximately 0.5-50 micrometers, or it may be formed from a plurality of particles or beads retained by a pair of membranes. When the disc is relatively small such as approximately 1 millimeter in diameter, it may be pressed into a constricted end of the support member. When the disc has an increased diameter it, may be rigidly supported by a retainer preferably made from a mesh material and welded to the support …
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 October 1, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 1, 2008.
- 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.