Method and apparatus for measuring the water soluble strong acids suspended in air
CA 2037514 A1 · Owner: Kley, Dieter · Inventors: Volz-Thomas, Andreas; Vetter, Andreas; Kley, Dieter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Atty. Dkt.: 910084/W, ABSTRACT OF THE DISCLOSURE Measurements of acids in air can be greatly falsified by the content of carbon dioxide in the air in spite of the low solubility of carbon dioxide in water and its low dissociation constant. When the measurements are made after a simple absorption of the acid residues in the air in an absorption solution. The air separated from the absorption solution on its way to measurement is cleaned of carbon dioxide by exposure to silica gel and soda-lime and then is used to clean the absorption solution of carbon dioxide in a similar exposure of air to the liquid. The measurement of the acidity of the solution thus cleaned of carbon dioxide provides …
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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 March 4, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 4, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 4, 2013.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.