Patents by Inventor Salvatore Anthony Bruno

Salvatore Anthony Bruno 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).

  • Low density silica particles and method for their preparation
    Patent number: 5976478
    Abstract: Internal porosity is created in dense SiO.sub.2 particles by heating a mixture of the particles with B.sub.2 O.sub.3 at a temperature above about 450.degree. C. Resulting SiO.sub.2 particles have altered morphology, internal porosity, and small to negative volume changes when heated.
    Type: Grant
    Filed: December 21, 1998
    Date of Patent: November 2, 1999
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Donald Keith Swanson, Salvatore Anthony Bruno
  • Hydrothermal process for making ultrafine metal oxide powders
    Patent number: 5973175
    Abstract: An ultrafine titanium dioxide powder is disclosed that can be produced by hydrothermal treating an amino titanium oxalate composition. Ultrafine titanium dioxide powders are useful in cosmetic and other applications for controlling exposure to ultraviolet (UV) light.
    Type: Grant
    Filed: February 17, 1998
    Date of Patent: October 26, 1999
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Salvatore Anthony Bruno
  • Hydrothermal process for making ultafine metal oxide powders
    Patent number: 5776239
    Abstract: An ultrafine titanium dioxide powder is disclosed that can be produced by hydrothermal treating an amino titanium oxalate composition. Ultrafine titanium dioxide powders are useful in cosmetic and other applications for controlling exposure to ultraviolet (UV) light.
    Type: Grant
    Filed: August 22, 1997
    Date of Patent: July 7, 1998
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Salvatore Anthony Bruno
  • Luminescent materials prepared by coating luminescent compositions onto substrate particles
    Patent number: 5643674
    Abstract: The present invention relates to a novel cost efficient luminescent composition comprising particles of a core material which have been coated with a luminescent material that is distributed in the form of a chemically homogeneous layer. The average diameter of the core particle is in the range of from about 0.5 to 20 microns, and the coating corresponds to between about 2 and 30 wt % of the total composition. One aspect the invention relates to a process for preparing the composition which comprises decomposing chelated metal luminescent precursors in solution at a relatively high pH while in the presence of dispersed core particles, thereby coating the core particles with hydrous metal oxides, recovering the coated particles, washing the coated particles substantially free from soluble species, drying and calcining. In another aspect, a hydrous oxide coating is converted to a sulfide coating by treating the hydrous coating with a source of active sulfur.
    Type: Grant
    Filed: June 1, 1993
    Date of Patent: July 1, 1997
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Salvatore Anthony Bruno, Donald Keith Swanson
  • 1-(4-Acyloxyalkylaminonaphthylazo)-4-nitrobenzene disperse dyes
    Patent number: 4054560
    Abstract: Disperse monoazo dyes, useful for the dyeing and printing of polyester, polyamide and cellulose acetate fibers in navy-blue shades, having the formula ##STR1## wherein R.sub.1 is Br, Cl or CN; R.sub.2 is CN or NO.sub.2 ; is C.sub.2-4 --alkylene; and R.sub.4 is a selected aliphatic, cycloaliphatic, or aromatic radical.
    Type: Grant
    Filed: December 31, 1975
    Date of Patent: October 18, 1977
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Salvatore Anthony Bruno