Extended surface pocket type air filter
CA 2097274 C · Owner: Sutton, Darrel · Inventors: Sutton, Darrel; Benoit, Michael; Gagne, Daniel
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An extended pocket type air filter formed of a single rectangular frame enclosing and locking a plurality of parallel header plates each having complementary projections and grooves on opposite edges, the complementary projections of one header fitting into the grooves of an adjacent header and securing pocket type air filter medium between them. A rivet secures ends of the frame to each other about the header plates.
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 28, 1993 and granted August 24, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 28, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 28, 2015.
- 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.