Patents by Inventor Ishar D. Aggarwal

Ishar D. Aggarwal 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).

  • Hot isostatic pressing of fluoride glass materials
    Patent number: 5078768
    Abstract: Defect-free fluoride glass materials are made by hot isostatic pressing (HIP) of a fluoride glass. The process may be used to manufacture preforms or bulk fluoride glass. The external pressure applied during HIP squeezes bubbles from the glass and permits the use of a wider range of working temperatures than ordinarily available, thereby reducing crystallization defects.
    Type: Grant
    Filed: December 21, 1990
    Date of Patent: January 7, 1992
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Ishar D. Aggarwal, Barry B. Harbison