Expandable bed fibre filter and coalescer
CA 1297424 C · Owner: Lawrence, Anna Christine · Inventors: Chown, Philip Keith; Macfarlane, Anthony Stuart; Green, Eric Charles
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Case 6155, Case 6155, ABSTRACT OF THE DISCLOSURE EXPANDALBE BED FIBRE FILTER AND COALESCER A filter coalescer cartridge for removing contaminants from a liquid comprises:, (a) a first support at one end of the cartridge (b) a second end support tending towards the other end of the cartridge, (c) a filter coalescer element comprising a plurality of aligned fibres or bundles of fibres, each fibre or bundle being secured at one end to one end support and at the other end to the other end support, and, (d) a drive mechanism for relatively rotating and moving the end supports towards and away from each other to twist and compress and straighten and extend respectively the filter coalescer …
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 17, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 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.