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Leslie D. Rikker
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Oak Forest, IL, US
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Patents Grants
last 30 patents
Information
Patent Grant
Method and apparatus for treating gaseous material from evaporative...
Patent number
5,062,470
Issue date
Nov 5, 1991
Leslie D. Rikker
B22 - CASTING POWDER METALLURGY
Information
Patent Grant
Molding medium, method for making same and evaporative pattern cast...
Patent number
5,012,857
Issue date
May 7, 1991
Leslie D. Rikker
B22 - CASTING POWDER METALLURGY
Information
Patent Grant
Method and apparatus for evaporative pattern casting
Patent number
4,947,923
Issue date
Aug 14, 1990
Leslie D. Rikker
B22 - CASTING POWDER METALLURGY
Information
Patent Grant
Molding medium, method for making same and evaporative pattern cast...
Patent number
4,651,798
Issue date
Mar 24, 1987
Leslie D. Rikker
B22 - CASTING POWDER METALLURGY
Information
Patent Grant
Mixer apparatus
Patent number
4,368,984
Issue date
Jan 18, 1983
National Engineering Company
Leslie D. Rikker
B22 - CASTING POWDER METALLURGY
Information
Patent Grant
Method and apparatus for making molds
Patent number
4,190,369
Issue date
Feb 26, 1980
National Engineering Company
Leslie D. Rikker
B22 - CASTING POWDER METALLURGY
Information
Patent Grant
Impact scrubber
Patent number
4,177,952
Issue date
Dec 11, 1979
National Engineering Company
Leslie D. Rikker
B22 - CASTING POWDER METALLURGY
Information
Patent Grant
Method and apparatus for making molds
Patent number
4,121,646
Issue date
Oct 24, 1978
National Engineering Company
Leslie D. Rikker
B22 - CASTING POWDER METALLURGY