Ralph S. Frost

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Olympic Fields, IL, US

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Patents Grantslast 30 patents

Information Patent Grant
Method for quenching railway rail heads
- Patent number 5,183,519
- Issue date Feb 2, 1993
- Chemetron-Railway Products, Inc.
- Emmerich E. Wechselberger
- C21 - METALLURGY OF IRON
Information Patent Grant
Apparatus for air quenching railway heads
- Patent number 4,938,460
- Issue date Jul 3, 1990
- Chemetron-Railway Products, Inc.
- Emmerich E. Wechselberger
- C21 - METALLURGY OF IRON