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Henry M. Demarest Jr.
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Natrona Heights, PA, US
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Patents Grants
last 30 patents
Information
Patent Grant
Method of making glass with preliminary reaction of batch materials
Patent number
4,920,080
Issue date
Apr 24, 1990
PPG Industries, Inc.
Henry M. Demarest
C03 - GLASS MINERAL OR SLAG WOOL
Information
Patent Grant
Batch melting vessel lid cooling construction
Patent number
4,789,390
Issue date
Dec 6, 1988
PPG Industries, Inc.
Gerald E. Kunkle
C03 - GLASS MINERAL OR SLAG WOOL
Information
Patent Grant
Method and apparatus for feeding a rotating melter
Patent number
4,666,489
Issue date
May 19, 1987
PPG Industries, Inc.
Henry M. Demarest
C03 - GLASS MINERAL OR SLAG WOOL
Information
Patent Grant
Method of melting raw materials for glass or the like with staged c...
Patent number
4,634,461
Issue date
Jan 6, 1987
PPG Industries, Inc.
Henry M. Demarest
C03 - GLASS MINERAL OR SLAG WOOL
Information
Patent Grant
Method of melting raw materials for glass or the like using solid f...
Patent number
4,632,687
Issue date
Dec 30, 1986
PPG Industries, Inc.
Gerald E. Kunkle
C03 - GLASS MINERAL OR SLAG WOOL
Information
Patent Grant
Method and apparatus for inductively heating molten glass or the like
Patent number
4,610,711
Issue date
Sep 9, 1986
PPG Industries, Inc.
Joseph M. Matesa
F27 - FURNACES KILNS OVENS RETORTS
Information
Patent Grant
Method of pretreating glass batch
Patent number
4,604,121
Issue date
Aug 5, 1986
PPG Industries, Inc.
Henry M. Demarest
C03 - GLASS MINERAL OR SLAG WOOL
Information
Patent Grant
Melting glass with port and melter burners for NO.sub.x control
Patent number
4,599,100
Issue date
Jul 8, 1986
PPG Industries, Inc.
Henry M. Demarest
C03 - GLASS MINERAL OR SLAG WOOL
Information
Patent Grant
Method of calcining and liquefying glass batch
Patent number
4,539,030
Issue date
Sep 3, 1985
PPG Industries, Inc.
Henry M. Demarest
C03 - GLASS MINERAL OR SLAG WOOL
Information
Patent Grant
Two stage batch liquefaction process and apparatus
Patent number
4,519,814
Issue date
May 28, 1985
PPG Industries, Inc.
Henry M. Demarest
C03 - GLASS MINERAL OR SLAG WOOL
Information
Patent Grant
Method of and apparatus for removing gas inclusions from a molten g...
Patent number
4,406,683
Issue date
Sep 27, 1983
PPG Industries, Inc.
Henry M. Demarest
C03 - GLASS MINERAL OR SLAG WOOL
Information
Patent Grant
Stain decorated glass-ceramic article
Patent number
3,940,531
Issue date
Feb 24, 1976
PPG Industries, Inc.
Henry M. Demarest
C03 - GLASS MINERAL OR SLAG WOOL
Information
Patent Grant
Novel flat glass-producing furnace
Patent number
3,936,290
Issue date
Feb 3, 1976
PPG Industries, Inc.
Richard L. Cerutti
C03 - GLASS MINERAL OR SLAG WOOL