Pollution abatement system
CA 2031822 A1 · Owner: Rodberg, Joan A. · Inventors: Keller Ii, George E.; Rodberg, Joan A.; Miller, Jay F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process that deals with the sick building syndrome and building related illnesses, and solves volatile organic compound and biological pollutionproblems associated with large confined areas through which forced air is circulated, and the area is utilized for sociatary functions or activities e.g,habitation by animals and/or equipment or other materials sensitive to pollutants or contaminants utilized in a societary activity within such areas which comprises treating the circulating air in an air treatment zone (i) with ozone in a depollution catalytic zone removed from contact with humans and/or the sensitive equipment to remove pollutants and contaminants from the air, and thereafter, …
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 December 7, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 7, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 7, 2012.
- 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.