Eric N. Johnson

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Clinton, IA, US

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Patents Grantslast 30 patents

Information Patent Grant
Bi-metal panel for electric arc furnace
- Patent number 6,137,823
- Issue date Oct 24, 2000
- J. T. Cullen Co., Inc.
- Eric N. Johnson
- F27 - FURNACES KILNS OVENS RETORTS
Information Patent Grant
End caps and elbows for cooling coils for an electric arc furnance
- Patent number 5,740,196
- Issue date Apr 14, 1998
- J. T. Cullen Co., Inc.
- Eric N. Johnson
- F27 - FURNACES KILNS OVENS RETORTS
Information Patent Grant
Coolant coils for a smelting furnace roof
- Patent number 5,289,495
- Issue date Feb 22, 1994
- J. T. Cullen Co., Inc.
- Eric N. Johnson
- F27 - FURNACES KILNS OVENS RETORTS
Information Patent Grant
End cap for cooling coils for an arc furnace
- Patent number 5,197,080
- Issue date Mar 23, 1993
- J. T. Cullen Co., Inc.
- Eric N. Johnson
- F27 - FURNACES KILNS OVENS RETORTS