Bar screen having compound fine screen bar rack
CA 2128374 C · Owner: Brummond, Robert A. · Inventors: Brummond, Robert A.; Scheel, Roger; Heidner, James L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A bar screen for screening a flow of wastewater the, bar screen comprising a frame, a first bar rack supported by the frame and extending across the flow of wastewater the first bar, rack including a plurality of generally parallel elongated first, bars each having a top end and a bottom end the plurality of, first bars defining therebetween a plurality of upstream spaces a first bar rack top support engaged with the top end of each first bar and a first bar rack bottom support engaged with the bottom end of each first bar, a second bar rack supported by the frame and extending across the flow of wastewater the second bar, rack including a plurality of generally parallel elongated, second …
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 July 19, 1994 and granted May 11, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 19, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 19, 2016.
- 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.