Electric heating – Heating devices – With heating unit structure
Reexamination Certificate
2006-05-23
2006-05-23
Fuqua, Shawntina (Department: 3742)
Electric heating
Heating devices
With heating unit structure
C219S552000, C264S431000, C264S273000, C264S267000, C156S064000, C156S089220, C156S074000, C428S138000, C428S188000, C428S116000
Reexamination Certificate
active
07049561
ABSTRACT:
A far infrared tubular porous ceramic heating element which is suitable for various kinds of catalyst, heater and electric conductor . . . etc. Inside the body, a plurality of via holes is formed, and the crossing portions of the walls of via holes are formed in arc shape so as to prevent breaking and disturbance to heat flow.
REFERENCES:
patent: 5399841 (1995-03-01), Abe et al.
Dennison Schultz Dougherty & MacDonald
Fuqua Shawntina
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