Patents by Inventor James L. Oravitz, Jr.

James L. Oravitz, Jr. 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).

  • Vacuum insulating unit
    Patent number: 5124185
    Abstract: A vacuum insulating unit has a pair of glass sheets spaced from one another by a plurality of plastic supports. The supports have one end secured to one of the sheets and a low friction material on the other end. A flexible metal edge retainer is secured to sheets to provide a sealed compartment between the sheets. Air in the compartment is removed to put the compartment under negative pressure. A getter is provided in the compartment to adsorb any gas therein during sealing or using the unit. One of the sheets may have an environmental coating.Methods are disclosed for fabricating the unit and the supports.
    Type: Grant
    Filed: October 3, 1989
    Date of Patent: June 23, 1992
    Assignee: PPG Industries, Inc.
    Inventors: Thomas P. Kerr, Shaow B. Lin, Peter P. Harmon, William R. Siskos, James L. Oravitz, Jr., Paul E. Shaffer
  • Method of imposing a damage free score in a refractory piece
    Patent number: 4423835
    Abstract: Damage free scores are initiated in a refractory piece by advancing a pattern of grit material on the surface of the refractory piece under a properly biased scoring wheel. The grit material is preferably harder than the surface of the refractory piece but not as hard as the scoring surface of the scoring wheel.
    Type: Grant
    Filed: October 2, 1981
    Date of Patent: January 3, 1984
    Assignee: PPG Industries, Inc.
    Inventors: Charles J. Hyatt, James L. Oravitz, Jr.
  • Method of and apparatus for preventing premature severing of scored ribbon edges
    Patent number: 4196830
    Abstract: A glass ribbon moves downstream under a pair of scoring wheels to score the bulb edges of the ribbon and thereafter past a cross scorer to laterally score the ribbon. As the ribbon moves further downstream the scores at the bulb edge move under (1) a plurality of hot airstreams which propagate the fissure depth of the score and (2) under a cold airstream to concentrate the stress field about the score line to prevent premature severing of the bulb edges due to mechanical vibrations generated during subsequent opening of the lateral score.
    Type: Grant
    Filed: July 27, 1978
    Date of Patent: April 8, 1980
    Assignee: PPG Industries, Inc.
    Inventors: James L. Oravitz, Jr., John R. Dahlberg
  • Oilless fluid for scoring glass
    Patent number: 4084737
    Abstract: A cutting fluid is disclosed comprising one or more halogenated hydrocarbons dissolved in one or more paraffin, naphtha, or aromatic solvents. Use of the cutting fluid produces a glass edge with increased edge strength compared with a cut edge produced by dry scoring. The cutting fluid is completely evaporative, leaving no residue, thus eliminating the need for washing. Further, use of the cutting fluid extends the useful life of the cutting tool. Blends are formulated to meet specific evaporation rates required by variations in wareroom equipment and practices.
    Type: Grant
    Filed: August 16, 1976
    Date of Patent: April 18, 1978
    Assignee: PPG Industries, Inc.
    Inventors: Harold R. Gorman, John R. Dahlberg, James L. Oravitz, Jr.