William E. Sikkenga

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Twin Lake, MI, US

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Patents Grantslast 30 patents

Information Patent Grant
Multi-wall core and process
- Patent number 6,626,230
- Issue date Sep 30, 2003
- Howmet Research Corporation
- Harry A. Woodrum
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Multipiece core assembly for cast airfoil
- Patent number 6,347,660
- Issue date Feb 19, 2002
- Howmet Research Corporation
- William E. Sikkenga
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Multipiece core assembly
- Patent number 6,186,217
- Issue date Feb 13, 2001
- Howmet Research Corporation
- William E. Sikkenga
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Investment casting using core with integral wall thickness control...
- Patent number 5,296,308
- Issue date Mar 22, 1994
- Howmet Corporation
- Charles F. Caccavale
- B22 - CASTING POWDER METALLURGY