Patents Represented by Attorney Sandia K. Nowak

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  • Pavement marking, reflective elements, and methods of making microspheres
    Patent number: 7947616
    Abstract: Presently described are retroreflective articles, such as pavement markings, that comprise transparent microspheres partially embedded in a (e.g., polymeric) binder. Also described are (e.g., glass-ceramic) microspheres, methods of making microspheres, as well as compositions of glass materials and compositions of glass-ceramic materials. The microspheres generally comprise lanthanide series oxide(s), titanium oxide (TiO2), and optionally zirconium oxide (ZrO2).
    Type: Grant
    Filed: May 12, 2010
    Date of Patent: May 24, 2011
    Assignee: 3M Innovative Properties Company
    Inventors: Matthew H. Frey, Anatoly Z. Rosenflanz, Kenton D. Budd