Patents by Inventor Franklin D. Lewandowski

Franklin D. Lewandowski 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).

  • Patent number: 4428866
    Abstract: A mixture of an alkyl amine, e.g., tri-n-propylamine and an SO.sub.3 -containing acid, preferably, sulfamic acid is injected into the flue gas stream of a coal-fired utility boiler to reduce the electrical resistivity of the fly-ash particles and to increase their mean particle size, thereby improving their recovery by electrostatic precipitation or by mechanical separation, with consequent reduction in stack emission.
    Type: Grant
    Filed: August 19, 1982
    Date of Patent: January 31, 1984
    Assignee: Dearborn Chemical Company
    Inventors: Richard L. Every, Franklin D. Lewandowski, Jerome F. Lech
  • Patent number: 4352747
    Abstract: A mixture of an alkyl amine, e.g., tri-n-propylamine and an SO.sub.3 -containing acid, preferably, sulfamic acid is injected into the flue gas stream of a coal-fired utility boiler to reduce the electrical resistivity of the fly-ash particles and to increase their mean particle size, thereby improving their recovery by electrostatic precipitation or by mechanical separation, with consequent reduction in stack emissions.
    Type: Grant
    Filed: March 30, 1979
    Date of Patent: October 5, 1982
    Assignee: Dearborn Chemical Company
    Inventors: Richard L. Every, Franklin D. Lewandowski, Jerome F. Lech