Patents by Inventor Leonard F. Laskowski

Leonard F. Laskowski 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 for preparing phosphorus trichloride
    Patent number: 5310529
    Abstract: There is disclosed an improved process for the preparation of phosphorus trichloride wherein elemental phosphorus is caused to react with chlorine. The improvement comprises continuous, high speed analysis of the contents of the reactor whereby the reaction is controlled to produce less phosphorus pentachloride and other by-products. The analysis is performed by a laser Raman spectrometer associated with an optrode having a remotely located probe head and a circulating sampling system to continuously provide fresh sample to the probe head continuously. Also disclosed is apparatus for the automatic control of the reaction by control of the reactant feed to the reactor in response to the on-line, continuous analysis of the reactor contents.
    Type: Grant
    Filed: September 28, 1992
    Date of Patent: May 10, 1994
    Assignee: Monsanto Company
    Inventors: Macaulay S. Feld, David O. Fisher, John J. Freeman, Gregory J. Gervasio, Mark A. Hochwalt, Leonard F. Laskowski, Evan E. Thomsen
  • Apparatus for preparing phosphorus trichloride
    Patent number: 5260026
    Abstract: There is disclosed an improved process for the preparation of phosphorus trichloride wherein elemental phosphorus is caused to react with chlorine. The improvement comprises continuous, high speed analysis of the contents of the reactor whereby the reaction is controlled to produce less phosphorus pentachloride and other by-products. The analysis is performed by a laser Raman spectrometer associated with an optrode having a remotely located probe head and a circulating sampling system to continuously provide fresh sample to the probe head continuously. Also disclosed is apparatus for the automatic control of the reaction by control of the reactant feed to the reactor in response to the on-line, continuous analysis of the reactor contents.
    Type: Grant
    Filed: December 16, 1991
    Date of Patent: November 9, 1993
    Assignee: Monsanto Company
    Inventors: Macaulay S. Feld, David O. Fisher, John F. Freeman, Gregory J. Gervasio, Mark A. Hochwalt, Leonard F. Laskowski, Evan E. Thomsen