George BowserKittanning, PA

3971178, Jul 27, 1976

Mar 25, 1974

5/454338

Renato J. Mazzoni - Tarentum PA
George H. Bowser - New Kensington PA
Richard R. Lewchuk - Allison Park PA

PPG Industries, Inc. - Pittsburgh PA

E06B 712
E06B 328

52172

An additional pane is added to an existing glazing installation to provide an insulating, sealed airspace therebetween.

4593175, Jun 3, 1986

Feb 13, 1985

6/701325

George H. Bowser - New Kensington PA

PPG Industries, Inc. - Pittsburgh PA

B60L 102

219203

A braided, composite lead-in conduit for use in conducting electricity to electroconductive heating means of a heated, multiple-glazed window has spaces between individual wires filled with a substantially moisture impervious material to minimize mositure-vapor penetration into the insulating air space of the window.

5122403, Jun 16, 1992

Apr 3, 1989

7/332840

Amy M. Roginski - New Kensington PA
Bruce A. Connelly - Gibsonia PA
George H. Bowser - New Kensington PA

PPG Industries, Inc. - Pittsburgh PA

B32B 1710
B32B 3112

428 38

A laminated transparency with an electroconductive coating positioned within the laminate. An edge coating composition is applied about the periphery of the laminate to seal the edge of the coating and prevent coating degradation.

4622249, Nov 11, 1986

Apr 15, 1985

6/723111

George H. Bowser - New Kensington PA

PPG Industries, Inc. - Pittsburgh PA

E06B 366

428 34

A multiple pane unit comprising a pair of sheets maintained in parallel, spaced-apart relationship to each other by a spacing and sealing assembly defining a substantially hermetically sealed, insulating airspace between the sheets. The spacing and sealing assembly includes inner and outer elements. The outer element is adhered to the marginal periphery of the inner, facing surfaces of the sheets. The inner element is self-adhered to the marginal periphery of the inner, facing surfaces of the sheets in communication with the airspace and in juxtaposition to the outer element. Both the inner and outer elements have at least minimum adhesive structural bonding strength. The inner element preferably comprises a moisture vapor transmittable matrix material having a desiccant material dispersed therein, thereby ensuring communication between the desiccant and the airspace sufficient to maintain dryness of the airspace. The outer element is preferably composed of a substantially moisture-impervious material, to thereby prevent saturation of the desiccant and ensure the weathertight integrity or hermetic sealing of the unit.

4446184, May 1, 1984

Mar 5, 1982

6/355040

George H. Bowser - New Kensington PA

PPG Industries, Inc. - Pittsburgh PA

B32B 1706
G03B 2704

428 57

Hinged glass photomask assemblies for photolithographic processes are disclosed wherein a flexible polymeric hinge is used in combination with a flexible, non-extensible binding strip which prevents lateral movement of the glass plates thereby providing for repeated use of the phototool without the use of registration systems such as alignment pin assemblies.

4215164, Jul 29, 1980

Jun 9, 1975

5/584793

George H. Bowser - New Kensington PA

PPG Industries, Inc. - Pittsburgh PA

B32B 1710
E06B 324

428 34

A multiple glazed window unit employing a room temperature vulcanizable sealant is disclosed. The sealant comes in the form of two relatively low viscosity components, each of which has an unlimited storage life. When it is desired to apply the sealant, the components are fed to an extruder and blended together to form a cold flowable mastic material of relatively low viscosity which cures at room temperature to form a firm, tacky, resilient seal. Because each of the two components of the sealant composition are of low viscosity, the sealant can be extruded at relatively low temperatures, thus preventing rapid curing and insuring that the sealant composition will have an initial low viscosity, thereby permitting it to be applied to a multiple glazed unit with low temperature and pressure equipment.

4952430, Aug 28, 1990

Aug 29, 1988

7/238019

George H. Bowser - New Kensington PA
Stanley J. Pyzewski - Cheswick PA

PPG Industries, Inc. - Pittsburgh PA

E06B 324

428 34

A multiple-glazed window unit comprises a pair of glass sheets held in spaced relation to each other by a spacer and sealant assembly defining a sealed, insulating airspace between the sheets. The surface of the sheets facing the airspace has a protective surface. The spacer and sealant assembly is free of any desiccant. If desired, an opening may be provided through the spacer and sealant assembly to put the airspace in communication with the atmosphere external to the unit. In the stance where opposed openings are provided, and sized and configured to allow free movement of atmospheric air and water vapor molecules through the airspace to equalize airspace pressure and relative humidity with that of the external atmosphere, the protective surface is not needed. A filtering element is employed to minimize infiltration of liquid water, dust, dirt, and the like through the openings and into the airspace. The unit also comprises a sash retaining the unit within a structural opening.

4109431, Aug 29, 1978

Mar 25, 1974

5/454337

Renato J. Mazzoni - Tarentum PA
George H. Bowser - New Kensington PA

PPG Industries, Inc. - Pittsburgh PA

E06B 366

52172

A novel sealing and spacing unit for multiple glazed windows, and multiple glazed windows employing such a sealing and spacing unit, are disclosed. The sealing and spacing unit comprises a flexible, moisture-impervious base such as a strip of aluminum foil. Disposed on the base in a lengthwise manner is an elongated, flexible, dehydrator strip which comprises a particulate desiccant such as a crystalline zeolite dispersed throughout a moisture-permeable, elastic, polymeric matrix, such as an ethylene-ethyl acrylate copolymer. The dehydrator strip is secured to the base by a thin layer of an adhesive such as an ethylene acrylic acid copolymer hot melt adhesive. Also disposed on the base in a lengthwise manner are two strips of a cold flowable, moisture resistant, mastic, sealant composition. The strips are preferably spaced slightly apart from, and are positioned on both sides of the adhesively secured dehydrator strip. Preferably, the cold flowable, mastic, sealant composition is an admixture of polybutene and two different molecular weight polyisobutylenes.