Patents by Inventor Jose Francisco Gandarillas-Lastra

Jose Francisco Gandarillas-Lastra 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).

  • Optical lenses and processes of manufacture
    Patent number: 5994248
    Abstract: The invention relates to lenses such as aspherical lenses and to a process for their manufacture. According to the invention, the lens is composed of a glass matrix including the constituents below in the following weight proportions:______________________________________ SiO.sub.2 65-85% Al.sub.2 O.sub.3 0-10% B.sub.2 O.sub.3 0-20% Li.sub.2 O + Na.sub.2 O + K.sub.2 O 3-20% CaO + MgO + BaO 1-15% FeO + Fe.sub.2 O.sub.3 0-0.1%, ______________________________________wherein the K.sub.2 O content is equal to or less than 1% and the BaO content is equal to or less than 1%.
    Type: Grant
    Filed: November 6, 1997
    Date of Patent: November 30, 1999
    Assignee: Saint-Gobain Vitrage
    Inventors: Jose Francisco Gandarillas-Lastra, Benoit Trouille