Digester ventilation and utility module
CA 2067326 A1 · Owner: Ferlin, Keith · Inventors: Kemps, Morris P.; Ferlin, Keith
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to ventilation systems and more particularly to such systems as are used in industrial settings to exhaust harmful or unwanted gases present in confined space prior to commencement of repair or maintenance work hereafter called, shutdowns; or to exhaust harmful or unwanted gasses generated during shutdowns being performed in said confined space and more particularly to said conditions and work as elates to a continuous Kraft-pulp digester. The present invention also relates to utility systems and more particularly to such systems as are used in industrial settings to organize and deliver welding cables, compressed air lines power cords, oxyacetylene lines, …
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 April 27, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 27, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 27, 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.