Frank P. Merkle

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Hanover, IL, US

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Patents Grantslast 30 patents

Information Patent Grant
Industrial furnace roof assembly and components thereof
- Patent number 5,899,151
- Issue date May 4, 1999
- Merkle Engineers, Inc.
- Frank P. Merkle
- F23 - COMBUSTION APPARATUS COMBUSTION PROCESSES
Information Patent Grant
Modular solids charger
- Patent number 5,542,804
- Issue date Aug 6, 1996
- Merkle Engineers, Inc.
- Frank P. Merkle
- F27 - FURNACES KILNS OVENS RETORTS
Information Patent Grant
High temperature industrial furnace roof structure
- Patent number 5,357,540
- Issue date Oct 18, 1994
- Merkle Engineers Inc.
- Frank P. Merkle
- F27 - FURNACES KILNS OVENS RETORTS
Information Patent Grant
Solids charger
- Patent number 5,158,412
- Issue date Oct 27, 1992
- Merkle Engineers, Inc.
- Frank P. Merkle
- C03 - GLASS MINERAL OR SLAG WOOL
Information Patent Grant
Curved nose refractory construction
- Patent number 4,864,945
- Issue date Sep 12, 1989
- Merkle Engineers, Inc.
- Frank P. Merkle
- F27 - FURNACES KILNS OVENS RETORTS
Information Patent Grant
Suspended roof construction for industrial furnaces
- Patent number 4,475,470
- Issue date Oct 9, 1984
- Merkle Engineers, Inc.
- Frank P. Merkle
- F27 - FURNACES KILNS OVENS RETORTS
Information Patent Grant
Suspended roof construction for industrial furnaces
- Patent number 4,424,756
- Issue date Jan 10, 1984
- Merkle Engineers, Inc.
- Frank P. Merkle
- F27 - FURNACES KILNS OVENS RETORTS