Patents by Inventor Yves Andre Henri Brocheton

Yves Andre Henri Brocheton 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).

  • Photochromic glasses
    Patent number: 6162749
    Abstract: The invention concerns photochromic glasses with improved properties having the following composition, in wt. %: SiO.sub.2 : 51-66, B.sub.2 O.sub.3 : 15-23, Al.sub.2 O.sub.3 : 3-10, ZrO.sub.2 : 2.5-11, TiO.sub.2 : 0-1, Li.sub.2 O: 3-7, Na.sub.2 O: 0-8, K.sub.2 O: 2-9, Ag: 0.080-0.30, CuO>0.0020-0.0130, Cl: 0.1-0.6, Br 0.040-0.3, MgO: 0-3, CaO: 0-3, SrO: 0-3, BaO: 0-3, Nb.sub.2 O.sub.5 : 0-1, La.sub.2 O.sub.3 : 0-8, Y.sub.2 O.sub.3 : 0-8, with 0.2<Ag/(Cl+Br).ltoreq.0.5, Br/(Cl+Br)>0.15, 0.5.ltoreq.La.sub.2 O.sub.3 +Y.sub.2 O.sub.3.ltoreq.8, TiO.sub.2 +Nb.sub.2 O.sub.5 .ltoreq.1.2, 10.ltoreq.Al.sub.2 O.sub.3 +ZrO.sub.2 .ltoreq.17, MgO+CaO+SrO+BaO.ltoreq.6. Use for the production of ophthalmic lenses.
    Type: Grant
    Filed: July 29, 1999
    Date of Patent: December 19, 2000
    Assignee: Corning S.A.
    Inventors: Yves Andre Henri Brocheton, Michel Prassas