John D. Usher

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Beaver, PA, US

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Patents Grantslast 30 patents

Information Patent Grant
Refractory material sensor for determining level of molten metal an...
- Patent number 6,309,442
- Issue date Oct 30, 2001
- John D. Usher
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Method and system for testing the accuracy of a thermocouple probe...
- Patent number 6,139,180
- Issue date Oct 31, 2000
- Vesuvius Crucible Company
- John D. Usher
- G01 - MEASURING TESTING
Information Patent Grant
Apparatus and method for measuring the depth of molten steel and slag
- Patent number 5,827,474
- Issue date Oct 27, 1998
- Vesuvius Crucible Company
- John D. Usher
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Slag detecting apparatus and method
- Patent number 5,650,117
- Issue date Jul 22, 1997
- Vesuvius Crucible Company
- Donald H. M. Kings
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Probe system for reliably monitoring a condition in a metallurgical...
- Patent number 5,549,280
- Issue date Aug 27, 1996
- Vesuvius Crucible Company
- Donald H. M. Kings
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Thermocouple assembly
- Patent number 5,071,258
- Issue date Dec 10, 1991
- Vesuvius Crucible Company
- John D. Usher
- G01 - MEASURING TESTING