Chemistry: analytical and immunological testing – Metal or metal containing – Mn – te – re – fe – ru – os – co – rh – ir – ni – pd – pt
Reexamination Certificate
2005-03-01
2005-03-01
Warden, Jill (Department: 1743)
Chemistry: analytical and immunological testing
Metal or metal containing
Mn, te, re, fe, ru, os, co, rh, ir, ni, pd, pt
C436S073000, C436S072000, C436S164000, C422S082120, C106S400000, C106S403000, C106S404000, C106S480000
Reexamination Certificate
active
06861261
ABSTRACT:
An irreversible temperature indicating paint comprises 29 wt % to 37 wt % cobalt aluminium spinel and glass, 35 wt % to 45 wt % acrylic resin and 20 wt % to 30 wt % silicone resin excluding solvent. The solvent comprises a mixture of 80% 1-methoxy-2-propanol and 20% dipropylene glycol monomethyl ether. A particular irreversible temperature indicating paint comprises 34.9 wt % cobalt aluminium spinel and glass, 42.5 wt % acrylic resin and 22.6 wt % silicone resin excluding solvent. The irreversible temperature indicating paint has four or more colour changes in the temperature range 500° C. to 900° C. The irreversible temperature indicating paint is used to determine the temperatures to which various parts of turbine blades, turbine vanes or other components are subjected in operation of the gas turbine engine.
REFERENCES:
patent: 4613560 (1986-09-01), Dueber et al.
patent: 6436543 (2002-08-01), Endo et al.
patent: 1103059 (1968-02-01), None
patent: 2204874 (1988-11-01), None
Hodgkinson Elaine C
Watson Hugh M L
Cross LaToya
Manelli Denison & Selter PLLC
Rolls-Royce plc
Taltavull W. Warren
Warden Jill
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