John A. Straatmann

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Poland, OH, US

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Patents Grantslast 30 patents

Information Patent Grant
Tubular high strength low alloy steel for oil and gas wells
- Patent number 4,533,405
- Issue date Aug 6, 1985
- Amax Inc.
- David L. Sponseller
- C21 - METALLURGY OF IRON
Information Patent Grant
High strength alloy of ferritic structure
- Patent number 4,119,445
- Issue date Oct 10, 1978
- Youngstown Sheet and Tube Company
- Richard A. Bosch
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...