4. Chemistry of inorganic compounds
  5. Modifying or removing component of normally gaseous mixture
  6. Organic component

Henri Louis Drean

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Material and method for treating gaseous media containing...

Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Organic component
Reexamination Certificate

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Treatment process for a gaseous medium containing...

Chemical apparatus and process disinfecting – deodorizing – preser – Process disinfecting – preserving – deodorizing – or sterilizing – A gas is substance acted upon
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