Patents by Inventor Robert J. Landry

Robert J. Landry 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).

  • Photochemotherapy dosimeter
    Patent number: 5527349
    Abstract: A photochemotherapy dosimeter for monitoring cumulative photochemotherapy radiation dosage. The photochemotherapy dosimeter includes an optical fiber having a chemical cell attached at one end thereof. The chemical cell contains a photobleachable chemical which can be in a solution or incorporated into a matrix material. Changes in the absorption of the photobleachable chemical are used to monitor the cumulative photochemotherapy radiation dosage. In use, the chemical cell of the photochemotherapy dosimeter is positioned near an abnormal tissue which is subjected to photochemotherapy treatment.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: June 18, 1996
    Assignee: The United States of America as represented by the Secretary of the Department of Health and Human Services
    Inventors: Robert J. Landry, Stephanie Matchette, Glenn N. Merberg
  • Photochemotherapy dosimeter
    Patent number: 5441530
    Abstract: A photochemotherapy dosimeter for monitoring cumulative photochemotherapy radiation dosage. The photochemotherapy dosimeter includes an optical fiber having a chemical cell attached at one end thereof. The chemical cell contains a photobleachable chemical which can be in a solution or incorporated into a matrix material. Changes in the absorption of the photobleachable chemical are used to monitor the cumulative photochemotherapy radiation dosage. In use, the chemical cell of the photochemotherapy dosimeter is positioned near an abnormal tissue which is subjected to photochemotherapy treatment.
    Type: Grant
    Filed: January 25, 1994
    Date of Patent: August 15, 1995
    Assignee: The United States of America as represented by the Department of Health and Human Services
    Inventors: Robert J. Landry, Stephanie Matchette, Glenn N. Merberg
  • Semiconducting glasses and the method of preparation thereof
    Patent number: 3950176
    Abstract: Chemically stable, semiconducting glasses having a resistivity of from about 2 .times. 10.sup.7 to about 6 .times. 10.sup.8 ohm.sup.. cm contain 25 to 35 weight percent of vanadium pentoxide, 10 to 20 weight percent phosphorous pentoxide, and from 35 to 45 weight percent of molybdenum trioxide. These semiconducting glasses are melted readily, are castable into desired shapes, and offer good resistance to devitrification.
    Type: Grant
    Filed: April 24, 1974
    Date of Patent: April 13, 1976
    Assignee: American Optical Corporation
    Inventors: Emil W. Deeg, Robert E. Graf, Robert J. Landry