Filter forming and joining apparatus
CA 2361500 A1 · Owner: Midmac Systems, Inc · Inventors: Hedlund, Timothy R.; Jagger, Theodore W.; Blietz, Wilmer E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A filter forming and joining apparatus of the present invention automatically forms a succession of metal-free cylindrical filter elements from a pleat block of pleated filter material, each pleat block (112) having a first end pleat at a first end of the pleat block and a second end pleat at a second end of the pleat block. The apparatus including a pleat block isolator (300) for isolating successive individual pleat blocks from other pleat blocks in a succession of pleat blocks in preparation for filter formation a filter , former (400) that manipulates each isolated pleat block along a forming path into a hollow cylinder shape, the hollow cylinder-shaped isolated pleat block …
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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 February 3, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 3, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 3, 2022.
- 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.