Patents by Inventor Thomas Barrow

Thomas Barrow 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).

  • Melting of glass
    Patent number: 6715319
    Abstract: A method of producing flat glass in which foam which appears on the surface of molten glass melted using oxy-fuel burners is dispersed by directing a diffuse, luminescent flame onto the surface of the glass carrying the foam.
    Type: Grant
    Filed: March 23, 2001
    Date of Patent: April 6, 2004
    Assignee: Pilkington plc
    Inventors: Thomas Barrow, David Alan Bird
  • Melting of glass
    Publication number: 20020134112
    Abstract: A method of producing flat glass in which foam which appears on the surface of molten glass melted using oxy-fuel burners is dispersed by directing a diffuse, luminescent flame onto the surface of the glass carrying the foam.
    Type: Application
    Filed: March 23, 2001
    Publication date: September 26, 2002
    Inventors: Thomas Barrow, David Alan Bird
  • Photochromic boro-silicate glass
    Patent number: 4290813
    Abstract: Fast-response photochromic boro-silicate glasses which have a half-fading time of not more than 145 secs, have silver halide crystals dispersed throughout the glass and are free from barium, comprise, in weight percentages:SiO.sub.2 --31 to 59%B.sub.2 O.sub.3 --18 to 28%Al.sub.2 O.sub.3 --8 to 20%R.sub.2 O--6 to 16%wherein R.sub.2 O represents one or more of Li.sub.2 O, Na.sub.2 O and K.sub.2 O in amounts within the ranges 0 to 3% Li.sub.2 O, 0 to 8% Na.sub.2 O and 0 to 16% K.sub.2 O, and where the content of silver, expressed as Ag.sub.2 O, lies within the range 0.05 to 0.4% by weight, while the content of halide lies within the range 0.13 to 1% by weight of the glass.Further optional constituents are MgO (up to 2.6%) and P.sub.2 O.sub.5 (up to 12%). Refractive index n.sub.D can be corrected to the standard ophthalmic value of 1.523 by additions of ZrO.sub.2, TiO.sub.2 and/or PbO.
    Type: Grant
    Filed: May 18, 1978
    Date of Patent: September 22, 1981
    Assignee: Pilkington Brothers Limited
    Inventors: Harry Owen, Thomas Barrow
  • Photochromic boro-silicate glass
    Patent number: 4102693
    Abstract: Fast-response photochromic boro-silicate glasses which have silver halide crystals dispersed throughout the glass and are free from barium, comprise, in weight percentages:______________________________________ SiO.sub.2 31 to 59% B.sub.2 O.sub.3 18 to 28% Al.sub.2 O.sub.3 8 to 20% R.sub.2 O 6 to 16% ______________________________________Where R.sub.2 O represents one or more of Li.sub.2 O, Na.sub.2 O and K.sub.2 O in amounts within the ranges 0 to 3% Li.sub.2 O, 0 to 8% Na.sub.2 O and 0 to 16% K.sub.2 O, and where the content of silver, expressed as Ag.sub.2 O, lies within the range 0.05 to 0.4% by weight, while the content of halide lies within the range 0.13 to 1% by weight of the glass.Further optional constituents are MgO (up to 2.6%) and P.sub.2 O.sub.5 (up to 12%). Refractive index n.sub.D can be corrected to the standard ophthalmic value of 1.523 by additions of ZrO.sub.2, TiO.sub.2 and/or PbO.
    Type: Grant
    Filed: January 31, 1977
    Date of Patent: July 25, 1978
    Assignee: Pilkington Brothers Limited
    Inventors: Harry Owen, Thomas Barrow