Metal founding – Process – Shaping a forming surface
Reexamination Certificate
2005-07-26
2005-07-26
Kerns, Kevin P. (Department: 1725)
Metal founding
Process
Shaping a forming surface
C164S519000
Reexamination Certificate
active
06920913
ABSTRACT:
Embodiments of a method for increasing the lifetime of a casting slurry are described. One feature of the disclosed embodiments comprises processing refractory materials that are used to form casting slurries to provide a substantial increase in slurry lifetime for slurries made using such processed materials compared to slurries made using materials not processed as described herein. One embodiment of the method comprises heat processing at least one refractory powder. Without limiting the invention to a theory of operation, processing is continued for a period of time sufficient to reduce the amount of hydration from a first hydration level to a second hydration level. A slurry is formed using the refractory powder at a hydration level which provides an increased slurry lifetime relative to the same material without processing according to the disclosed embodiments.
REFERENCES:
patent: 3590905 (1971-07-01), Watts et al.
patent: 3994346 (1976-11-01), Brown
patent: 4063954 (1977-12-01), Brown
patent: 4196769 (1980-04-01), Feagin
patent: 4947927 (1990-08-01), Horton
patent: 4996084 (1991-02-01), Elkachouty
patent: 5407001 (1995-04-01), Yasrebi et al.
patent: 5535811 (1996-07-01), Feagin
patent: 5624604 (1997-04-01), Yasrebi et al.
patent: 5629369 (1997-05-01), Guerra, Jr.
patent: 5630465 (1997-05-01), Feagin
patent: 5643844 (1997-07-01), Yasrebi et al.
patent: 5677371 (1997-10-01), Guerra
patent: 6345663 (2002-02-01), Klug et al.
patent: 6390179 (2002-05-01), Yasrebi et al.
Nikolas Douglas Gene
Sorbel Michael Gerald
Springgate Mark E.
Sturgis David Howard
Taft, III Karl Milton
Kerns Kevin P.
Klarquist & Sparkman, LLP
PCC Structurals, Inc.
LandOfFree
Method for processing casting materials to increase slurry... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for processing casting materials to increase slurry..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for processing casting materials to increase slurry... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3367825