Air filter with horizontal filter elements
CA 2016596 C · Owner: Williams, Roger D. · Inventors: Williams, Roger D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Apparatus for filtering dust and the like entrained in a flow of transport air which includes an enclosed housing having an upper filtering portion and a lower hopper for collecting dust. A plurality of filter elements are disposed in the upper housing portion and, a specially formed inlet plenum directs the transport air with entrained foreign particles in a predetermined direction toward the hopper so that heavier particles of dust are carried directly to the hopper by inertia rather than collecting on the filter elements. The filter elements are supported solely by a cluster of support rods extending across the housing, and an access opening and closure door are provided for inserting …
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 May 11, 1990 and granted October 21, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 11, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 11, 2012.
- 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.