Patents by Inventor Jose L. Boldu

Jose L. Boldu 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 for the preparation of photochromic insulating crystals
    Patent number: 4572618
    Abstract: A method for preparing reversible-photochromic magnesium oxide (MgO) crystals. Single crystals of MgO doped with both lithium (Li) and nickel (Ni) are grown by a conventional arc fusion method. The as-grown crystals are characterized by an amber coloration. The crystals lose the amber coloration and become photochromic when they are thermochemically reduced by heating at temperatures greater than 1000.degree. K. in a hydrogen atmosphere. Alternate irradiation with UV and visible light result in rejuvenation and bleaching of the amber coloration, respectively.
    Type: Grant
    Filed: September 28, 1984
    Date of Patent: February 25, 1986
    Assignee: The United States of America as represented by the Department of Energy
    Inventors: Marvin M. Abraham, Jose L. Boldu, Yok Chen, Victor M. Orera