Albert L. Lehman

Person

Mount Prospect, IL, US

People

Patents Grantslast 30 patents

Information Patent Grant
Nitrogen steel and method of manufacture thereof
- Patent number 5,232,660
- Issue date Aug 3, 1993
- A. Finkl & Sons Co.
- Charles W. Finkl
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Low alloy steel product
- Patent number 5,059,389
- Issue date Oct 22, 1991
- A. Finkl & Sons Co.
- Charles W. Finkl
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Method of ladle steelmaking and product produced thereby
- Patent number 4,600,427
- Issue date Jul 15, 1986
- A. Finkl & Sons Co.
- Albert L. Lehman
- C21 - METALLURGY OF IRON
Information Patent Grant
Ladle steelmaking method and apparatus
- Patent number 4,541,862
- Issue date Sep 17, 1985
- A. Finkl & Sons Co.
- Charles W. Finkl
- C21 - METALLURGY OF IRON
Information Patent Grant
Machinery steel
- Patent number 4,468,249
- Issue date Aug 28, 1984
- A. Finkl & Sons Co.
- Albert L. Lehman
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Steel having improved surface and reduction of area transverse prop...
- Patent number 4,318,739
- Issue date Mar 9, 1982
- A. Finkl & Sons Co.
- Albert L. Lehman
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Method for desulfurization using arc heat under vacuum
- Patent number 4,069,039
- Issue date Jan 17, 1978
- A. Finkl & Sons Co.
- Albert L. Lehman
- C21 - METALLURGY OF IRON
Information Patent Grant
Fatigue resistant steel, machinery parts and method of manufacture...
- Patent number 4,026,727
- Issue date May 31, 1977
- A. Finkl & Sons Company
- Charles W. Finkl
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...

Albert L. Lehman

Person

Patents Grantslast 30 patents

Nitrogen steel and method of manufacture thereof

Low alloy steel product

Method of ladle steelmaking and product produced thereby

Ladle steelmaking method and apparatus

Machinery steel

Steel having improved surface and reduction of area transverse prop...

Method for desulfurization using arc heat under vacuum

Fatigue resistant steel, machinery parts and method of manufacture...