|
US2485840A
|
|
Apparatus for supplying a treating gas
|
|
US2387406A
|
|
Apparatus for applying treating mediums
|
|
US2401012A
|
|
Apparatus for applying treating mediums
|
|
US2376178A
|
|
Apparatus for supplying a treating medium
|
|
US2358587A
|
|
Dosing device for gases
|
|
US2320095A
|
|
Method and apparatus for indicating dissolved oxygen in aqueous liquids
|
|
US2238747A
|
|
Apparatus for dosing liquids and gases
|
|
GB487500A
|
|
Improved apparatus for dosing liquids and gases
|
|
US2114234A
|
|
Apparatus for indicating oxidizing gases in aqueous liquids
|
|
GB412105A
|
|
A process for the preparation of aqueous solutions of hypochlorous acid
|
|
US2062231A
|
|
Treating water
|
|
GB406233A
|
|
Apparatus for introducing gases or liquids into flowing gases or liquids
|
|
US1944804A
|
|
Method and device for purifying aqueous liquids by treatment with chlorine
|
|
US1962571A
|
|
Device for making aqueous solutions of chlorine
|
|
US1944803A
|
|
Water treatment
|
|
GB367821A
|
|
A process for indicating and regulating the content of chlorine or similar water-purifying agents in flowing water or sewage
|
|
US1904246A
|
|
Art of treating sewage
|
|
US1937780A
|
|
Process for destruction of algae
|
|
GB340218A
|
|
An improved process and apparatus for the destruction of algae and fungi in water or sewage
|
|
GB300898A
|
|
Improvements in or relating to the treatment of water or sewage
|
