John F. Bortnik

Follow

Person

Ashtabula, OH, US

People

Patents Grantslast 30 patents

Information Patent Grant
System for recycling fines to hollow electrode
- Patent number 4,816,230
- Issue date Mar 28, 1989
- Elkem Metals Company
- John F. Bortnik
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
System for recycling fines to hollow electrode
- Patent number 4,491,568
- Issue date Jan 1, 1985
- Elkem Metals Company
- John F. Bortnik
- C01 - INORGANIC CHEMISTRY