Patents by Inventor Fredrick M. Ryan

Fredrick M. Ryan 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 arrangement for measuring the optical absorptions of gaseous mixtures
    Patent number: 4998017
    Abstract: A gas analyzer arrangement for detecting the presence or quantity of a gas of interest includes a source of electromagnetic radiation for directing a light beam through a light conditioning device such that the light beam is collimated into a parallel beam of light. The conditioned light beam is then directed through a gas sample cell which contains a sample of the gas of interest. The gas of interest has associated therewith, vibrational rotational absorption lines specific to that gas and which are effective for altering the light beam according to the absorption characteristics thereof. The altered light beam is then directed to a birefringent etalon device which has been sized specifically to match those absorption lines of the gas of interest.
    Type: Grant
    Filed: May 1, 1989
    Date of Patent: March 5, 1991
    Inventors: Fredrick M. Ryan, Milton S. Gottlieb
  • Method and arrangement for measuring the optical absorptions of gaseous mixtures
    Patent number: RE35355
    Abstract: A gas analyzer arrangement for detecting the presence or quantity of a gas of interest includes a source of electromagnetic radiation for directing a light beam through a light conditioning device such that the light beam is collimated into a parallel beam of light. The conditioned light beam is then directed through a gas sample cell which contains a sample of the gas of interest. The gas of interest has associated therewith, vibrational rotational absorption lines specific to that gas and which are effective for altering the light beam according to the absorption characteristics thereof. The altered light beam is then directed to a birefringent etalon device which has been sized specifically to match those absorption lines of the gas of interest.
    Type: Grant
    Filed: March 2, 1993
    Date of Patent: October 22, 1996
    Assignee: Rosemount Analytical Inc.
    Inventors: Fredrick M. Ryan, Milton S. Gottlieb