Patents by Inventor Markus Oldani

Markus Oldani has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process and apparatus for removing nitrates from a water stream during the treatment of process water
    Patent number: 5094732
    Abstract: Process and apparatus for removing nitrates during the treatment of process water, based on an electrodialysis process where, through the use of suitable membranes (3, 4), a preferential migration of nitrate ions NO.sub.3.sup.-, and thus selective removal of toxic nitrates, is achieved. Anion exchange membrane (3) having a selectivity for chloride transport over sulfate transport of >1. Cation exchange membrane (4) having a selectivity for Na.sup.+ transport over Ca.sup.2+ transport of >1. The membranes (3, 4) are plastic membranes having a surface treatment.
    Type: Grant
    Filed: April 25, 1990
    Date of Patent: March 10, 1992
    Assignee: Asea Brown Boveri Ltd.
    Inventors: Markus Oldani, Alex Miquel, Gunter Schock