Method of forming self-supporting pleated filter media
CA 2572307 C · Owner: Duffy, Dean R. · Inventors: Young, Donald E.; Duffy, Dean R.; Sundet, Douglas C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The method of forming pleated filter media includes providing a generally planar web of filter material (12), folding the web to form a pleated web having a plurality of fold lines, arranging the plurality of pleats (24) in a first spaced configuration defined by a first distance between adjacent pleat tips (34), applying a continuous strand of adhesive (32) to the web and , adjusting the arrangement of the plurality of pleats (24) into a second spaced configuration defined by a second distance between adjacent pleat tips (34). The web has a front face (36) and a rear face. Each fold line is intermediate oppositely sloping first and second wall surfaces (35). The plurality of fold …
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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 June 1, 2005 and granted September 10, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 1, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.