Patents by Inventor Alan R. Schwartz

Alan R. Schwartz 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 providing ventilatory support to a patient
    Patent number: 6457472
    Abstract: A ventilatory support system which controls the flow of breathing gas to a patient based on the physiological requirements of the patient is disclosed. Gas pressure in the trachea of the patient is measured, and the delivery of breathing gas to the patient is controlled based on the sensed gas pressure. Depending on the physiological needs of the patient, a tracheal gas pressure limit and a breathing gas flow rate value are established. When the tracheal gas pressure limit is reached, the flow of breathing gas is reduced or terminated. The flow of breathing gas is resumed, for example, after a delay period, or after the tracheal gas pressure falls to a predetermined level.
    Type: Grant
    Filed: December 11, 1997
    Date of Patent: October 1, 2002
    Assignee: The Johns Hopkins University
    Inventors: Alan R. Schwartz, Philip L. Smith
  • Method of preparing a dark body phosphor
    Patent number: 4393118
    Abstract: A pigmented phosphor is prepared by coating phosphor particles with a coating of finely powdered carbon and colloidal silica.
    Type: Grant
    Filed: November 18, 1981
    Date of Patent: July 12, 1983
    Assignee: GTE Products Corporation
    Inventors: Harry L. Marshall, Alan R. Schwartz
  • Treatment of coarse particle size zinc sulfide to improve visual and infrared transmission on hot-pressed articles
    Patent number: 4366141
    Abstract: Coarse particle size zinc sulfide is treated with a solution of alkali metal halide to make it adaptable for hot-pressing into shaped, polycrystalline windows which is more transparent in the visible to near visible and infrared spectral regions than untreated coarse particle size zinc sulfide.
    Type: Grant
    Filed: March 27, 1981
    Date of Patent: December 28, 1982
    Assignee: GTE Products Corporation
    Inventors: Brice E. Martin, Alan R. Schwartz