Inventor

FREDRIKSSON JOHN I

US2 patents

⚠️ This page may combine multiple inventors who share the name “FREDRIKSSON JOHN I”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

NORTON CO

1 patent

US4429003AJan 31, 1984

Protective coating for porous refractories

NORTON CO47 citations88

NORTON

1 patent

US4187344AFeb 5, 1980

Protective silicon nitride or silicon oxynitride coating for porous refractories

NORTON32 citations86