Johannes van Leeuwen

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Santpoort, NL

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Patents Grantslast 30 patents

Information Patent Grant
Apparatus for the flotation of flocculated solid material in a liquid
- Patent number 4,470,903
- Issue date Sep 11, 1984
- Esmil B.V.
- Johannes van Leeuwen
- B03 - SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES O...
Information Patent Grant
Apparatus for scraping sludge from the surface of a body of liquid
- Patent number 4,390,430
- Issue date Jun 28, 1983
- Esmil B.V.
- Johannes van Leeuwen
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL