Continuous filter framing strip storable in roll form
CA 2478995 A1 · Owner: Duffy, Dean R. · Inventors: Duffy, Dean R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A continuous strip of framing material suitable for use in making filter products that can be provided of indefinite length and which is storable as a flat product capable of being wound into roll form. Moreover the continuous , strip of framing material includes features to create a three-dimensional frame structure for wrapping about filtration media in a manner to provide a strong and effective filter product assembly.
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 January 22, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 22, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 22, 2025.
- 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.