Patents by Inventor Robert E. Apfel

Robert E. Apfel 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).

  • Patent number: 5840276
    Abstract: Dispersions of superheated drops of immiscible liquids in aqueous continuous phase suitable for infusion into a human or other animal, the drops being vaporizable in a selected body location by ionizing radiation or ultrasound. The dispersions can be used to form diagnostic contrast agents, to improve diffusion of drugs, to occlude capillaries and to deliver drugs selectively in a localized body region.
    Type: Grant
    Filed: January 8, 1997
    Date of Patent: November 24, 1998
    Assignee: Apfel Enterprises, Inc.
    Inventor: Robert E. Apfel
  • Patent number: 5384203
    Abstract: A method of making a solid foam material including the steps of heating in a chamber a starting material that is normally solid at room temperature to a temperature that is above its melting point, injecting a blowing liquid into the melted material to produce a mixture; and rapidly decompressing the mixture to produce the solid foam material.
    Type: Grant
    Filed: February 5, 1993
    Date of Patent: January 24, 1995
    Assignee: Yale University
    Inventor: Robert E. Apfel
  • Patent number: 4350607
    Abstract: A radiation detector and dosimeter is based on the fact that a sufficiently finely-dispersed liquid suspended in a host liquid of high viscosity or gel is stable at temperatures above its normal boiling point for long periods of time provided it is protected from contact with walls, or other types of initiators which can cause volatilization or vaporization of the droplets. Radiation, and particularly neutron radiation of sufficient energy and intensity on coming in contact with such droplets can trigger volatilization. The volume of vapor evolved can then serve as a measure of radiation intensity and dosage.
    Type: Grant
    Filed: September 11, 1978
    Date of Patent: September 21, 1982
    Inventor: Robert E. Apfel
  • Patent number: 4143274
    Abstract: A radiation detector and dosimeter is based on the fact that a sufficiently finely-dispersed liquid suspended in a host liquid of high viscosity or gel is stable at temperatures above its normal boiling point for long periods of time provided it is protected from contact with walls, or other types of initiators which can cause volatilization or vaporization of the droplets. Radiation, and particularly neutron radiation of sufficient energy and intensity on coming in contact with such droplets can trigger volatilization. The volume of vapor evolved can then serve as a measure of radiation intensity and dosage.
    Type: Grant
    Filed: July 28, 1977
    Date of Patent: March 6, 1979
    Inventor: Robert E. Apfel