Gas separation: processes – Deflecting – And filtering
Reexamination Certificate
2005-06-14
2005-06-14
Hopkins, Robert A. (Department: 1724)
Gas separation: processes
Deflecting
And filtering
C095S273000, C095S279000, C055S302000, C055S341100, C055S523000
Reexamination Certificate
active
06905533
ABSTRACT:
A method for avoiding the spontaneous ignition of combustible dusts in process off-gases, wherein during the process the dusts are retained, without adversely affecting the process parameters, at least one sintered filter element which is arranged in a pressure vessel and is able to withstand temperatures of up to at least 250° C. and after the process has ended the dusts are inerted by blasting oxygen-containing gas back into the pressure vessel, and to a device for carrying out the method.
REFERENCES:
patent: 5531798 (1996-07-01), Engstrom et al.
patent: 5895521 (1999-04-01), Otsuka et al.
patent: 6287528 (2001-09-01), Weber
patent: 3705793 (1987-11-01), None
patent: 3603511 (1988-12-01), None
patent: 19854235 (2000-05-01), None
English Derwent Abstract AN 1987-335863 corresponding to DE 3705793.
English Derwent Abstract AN 1987-222418 corresponding to DE 3603511.
English Derwent Abstract AN 2000-377549 corresponding to DE 19854235.
Becker Franz
Lehmann Lothar
Wachtler Horst
Brooks & Kushman P.C.
Hopkins Robert A.
Siltronic AG
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