Method and apparatus for decontamination of soils and other particulate materials
CA 2092322 C · Owner: Later, Roger Carson · Inventors: Later, Roger Carson
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Solid materials, such as soils, containing contaminants are treated with hydroxylradicals, in the gas phase. The hydroxyl radicals are created by hydrogen peroxide or ozone preferably a combination , of hydrogen peroxide ozone and UV light. A de-, contamination unit (10) for on-site use in the treatment of contaminated solid materials, such as contaminated soil, is a totally enclosed closed-loop system containing a soil augers (16) a first UV light port , (22), a hydrogen peroxide storage tank (24) further, augers (34, 48), a second UV light port (38) peroxide spray nozzles (28, 42) , and an air supply fan (50).
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 May 29, 1992 and granted October 21, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 29, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 29, 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.