Filter unit
CA 1098049 A · Owner: Millipore Corporation · Inventors: Edwards, James H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The arrangement of the disclosure comprises a filter unit having an upper, inlet chamber and a lower out-, let chamber. A hydrophilic filter separates the upper chamber from the lower chamber and a lower placed hydrophobic filter or membrane separates the lower chamber and the upper chamber. A liquid reservoir is provided in the first chamber between the filter and membrane, and a gas reservoir is provided in the second chamber between the filter and membrane. A liquid admitted to the upper inlet chamber, with a forward differential pressure that is with the pres-, sure in the upper chamber larger than that in the lower chamber will flow through the upper hydrophilic filter into the lower …
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 March 24, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 24, 1998.
- 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.