Liquid filter apparatus and method
CA 2051561 A1 · Owner: Bratten, Jack R. · Inventors: Bratten, Jack R.; Bratten, Jack R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A pressurized liquid filter in which a series of spaced apart, vertically extending filter plates are mounted between the sides of housing, inflatable hose seals extending across each top entrance and bottom exit. Filter media strips are draped vertically into the spaces, each disposed over a perforated sheet forming the outer layer of either side of each filter plate. The space between each pair of filter plates is subdivided into two filtering chambers by a dual element dewatering diaphragm mounted in a frame disposed centrally in each space. Liquid slurry is introduced into each chamber under pressure, flow induced to pass through the filter media strips and passing into vertical …
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
- Filed September 17, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 17, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 17, 2013.
- 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.