Patents by Inventor Carl Nelson Cederstrand

Carl Nelson Cederstrand 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).

  • Method and apparatus for the chemiluminescent detection of HCl
    Patent number: 4081247
    Abstract: A method of measuring trace level hydrogen chloride concentration in a gas stream is disclosed. The gas stream containing hydrogen chloride is passed through a heated vitreous carbon catalyst and then mixed with ozone in a point source reaction chamber. The light emitted in the chemical reaction is measured by a sensitive amplifier and the output is displayed on a meter, recorder, or any other suitable device. Apparatus for measuring trace level hydrogen chloride concentration in a gas stream is also disclosed.
    Type: Grant
    Filed: February 2, 1976
    Date of Patent: March 28, 1978
    Assignee: Beckman Instruments, Inc.
    Inventors: Radhakrishna Murty Neti, Carl Nelson Cederstrand