Metal treatment – Process of modifying or maintaining internal physical... – Processes of coating utilizing a reactive composition which...
Reexamination Certificate
2005-12-08
2009-02-10
King, Roy (Department: 1793)
Metal treatment
Process of modifying or maintaining internal physical...
Processes of coating utilizing a reactive composition which...
C148S284000, C148S287000, C420S043000, C420S094000, C420S097000
Reexamination Certificate
active
07488392
ABSTRACT:
A stainless steel comprising at least 20 weight % of chromium and at least 1.0 weight % of manganese is adapted to support an overcoating having a thickness from 1 to 10 microns of a spinel of the formula MnxCr3−xO4wherein x is from 0.5 to 2. Preferably the overcoating is on chromia and has stability against chemical reaction at temperatures at least 25° C. higher than the uncoated chromia.
REFERENCES:
patent: 6054231 (2000-04-01), Virkar et al.
patent: 6436202 (2002-08-01), Benum et al.
patent: 2159542 (1985-12-01), None
Benum Leslie Wilfred
Oballa Michael C.
Petrone Sabino Steven Anthony
Johnson Kenneth H.
King Roy
Nova Chemicals (International) S.A.
Zheng Lois L.
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