Patents by Inventor Dale W. Rinehart

Dale W. Rinehart 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).

  • Ion exchange strengthening of soda-lime-silica glass
    Patent number: 4192689
    Abstract: Ion exchange strengthening of soda-lime-silica glass compositions may be carried out at higher temperatures and thus greater speeds if the glasses include about 2.5 to 4.5 percent by weight Al.sub.2 O.sub.3 and/or 2 to 4.5 percent by weight ZrO.sub.2.
    Type: Grant
    Filed: May 30, 1978
    Date of Patent: March 11, 1980
    Assignee: PPG Industries, Inc.
    Inventor: Dale W. Rinehart
  • Lithium containing ion exchange strengthened glass
    Patent number: 4156755
    Abstract: Glasses having 59-62% by weight SiO.sub.2, 10-12% Na.sub.2 O, 4-5.5% Li.sub.2 O, 15-23% Al.sub.2 O.sub.3, and 2-5% ZrO.sub.2 have been found to be excellent for ion exchange strengthening below the strain point by exchanging the lithium ions with larger alkali metal ions such as sodium. Such glasses possess low melting temperatures, wide working ranges, and good chemical durability. The glasses are also free from corrosive volatile components, and sheets of such glasses resist devitrification when subjected to subsequent bending processes.
    Type: Grant
    Filed: April 19, 1978
    Date of Patent: May 29, 1979
    Assignee: PPG Industries, Inc.
    Inventor: Dale W. Rinehart
  • Chemical strengthening of glass
    Patent number: 4119760
    Abstract: Disclosed are improved glass compositions of the SiO.sub.2 -Na.sub.2 O-Al.sub.2 O.sub.3 -ZrO.sub.2 system for use in chemical strengthening. The improvement of the invention resides in proportioning the components so as to provide better melting glass compositions with lower liquidus temperatures and greater working ranges than normally associated with such systems. Such glasses are better suited for forming the updraw or float methods.
    Type: Grant
    Filed: December 17, 1976
    Date of Patent: October 10, 1978
    Assignee: PPG Industries, Inc.
    Inventor: Dale W. Rinehart
  • Ion exchange strengthened glass containing P.sub.2 O.sub.5
    Patent number: 4055703
    Abstract: An alkali-alumina-silica-zirconia glass capable of being chemically strengthened by exchanging sodium ions in the glass with potassium ions from an external source below the strain point of the glass has its ion exchange rate increased by incorporating 2 to 20 percent P.sub.2 O.sub.5 into the initial glass composition.
    Type: Grant
    Filed: July 19, 1976
    Date of Patent: October 25, 1977
    Assignee: PPG Industries, Inc.
    Inventor: Dale W. Rinehart
  • Chemically strengthened opal glass
    Patent number: 4053679
    Abstract: Opal glasses capable of being chemically strengthened by ion exchange with potassium are comprised of (by weight on the oxide basis):______________________________________ Composition Percent by Weight ______________________________________ SiO.sub.2 34 - 60 Na.sub.2 O 6 - 23 K.sub.2 O 0 - 15 (Na.sub.2 O + K.sub.2 O) 18 - 26 Al.sub.2 O.sub.3 0 - 18 ZrO.sub.2 0 - 20 (Al.sub.2 O.sub.3 + ZrO.sub.2) 4 - 21 P.sub.2 O.sub.5 7 - 20 CaO 0 - 9 SrO 0 - 9 (CaO + SrO) 2 - 9 Li.sub.2 O Less than 0.
    Type: Grant
    Filed: July 19, 1976
    Date of Patent: October 11, 1977
    Assignee: PPG Industries, Inc.
    Inventor: Dale W. Rinehart
  • Chemical strengthening of glass
    Patent number: 4015045
    Abstract: Disclosed are improved glass compositions of the SiO.sub.2 --Na.sub.2 O--Al.sub.2 O.sub.3 --ZrO.sub.2 system for use in chemical strengthening. The improvement of the invention resides in proportioning the components so as to provide better melting glass compositions with lower liquidus temperatures and greater working ranges than normally associated with such systems. Such glasses are better suited for forming by the updraw or float methods.
    Type: Grant
    Filed: August 15, 1975
    Date of Patent: March 29, 1977
    Assignee: PPG Industries, Inc.
    Inventor: Dale W. Rinehart