Electric heating – Heating devices – With heating unit structure
Reexamination Certificate
2007-10-30
2007-10-30
Fuqua, Shawntina (Department: 3742)
Electric heating
Heating devices
With heating unit structure
C219S540000, C219S530000, C219S517000, C219S505000, C338S0220SD, C392S395000, C392S391000, C392S403000, C392S485000, C123S547000, C361S104000
Reexamination Certificate
active
11614645
ABSTRACT:
PTC electrical heating devices are disclosed which are suitable to vaporize air treatment chemicals from an impregnated slab, such as insect repellents. In one form an electrical contact to a PTC heater element is provided with a bowl-shaped contact head to reduce the risk of edges of the contact cracking the heater element. In other forms peg and recess structures interact with apertures on a heat transfer plate to facilitate assembly of the parts of the structure.
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A Sep. 1, 2006 web site excerpt showing a Legobrick.
Fuqua Shawntina
S.C. Johnson & Son Inc.
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