Expandable multi-ply obliquely oriented honeycomb filter media
CA 2076911 A1 · Owner: Honeycomb Construction Services Ltd. · Inventors: Bagrin, Leonid Andreevich; Spencer, Victor Vernon (Deceased)
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Victor Vernon SPENCER (deceased), c/o his executrix Mary Spencer - and -, Leonid Andreevich BAGRIN, ABSTRACT A multi-ply expandable filter media formed of obliquely oriented honeycomb organized into a ply or run having expandable honeycomb cells with one run oriented at preferably an acute angle, of 30° to 60° relative to the cells of an adjacent run. Preferably, the respective plys or runs are arranged in relative parallel planes defining a planar space therebetween. There is provided means for collapsing the filter media into a closed compressed transportable, state, and when ready for use as a filter media to allow the, same to be expanded and pulled open and to be constrained in an …
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 August 26, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 26, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 26, 2014.
- 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.