4. Metal working
  5. Method of mechanical manufacture
  6. Repairing

John Corwyn Groen

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Protective cap for a thermocouple in a gasifier

Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Temperature – humidity – atmospheric condition
Design Patent

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Refractory protected replaceable insert

Gas: heating and illuminating – Generators – Cupola
Reexamination Certificate

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Refractory protected replaceable insert

Metal working – Method of mechanical manufacture – Repairing
Reexamination Certificate

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Self-anchoring expansion gap assembly for a gasifier

Furnaces – Process
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2313141

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