Electric heating – Heating devices – Combined with diverse-type art device
Reexamination Certificate
2006-11-07
2006-11-07
Evans, Robin (Department: 3742)
Electric heating
Heating devices
Combined with diverse-type art device
C219S522000, C219S541000, C343S713000
Reexamination Certificate
active
07132625
ABSTRACT:
A heatable article, e.g. a heatable windshield, having a generally trapezoidal shape has a conductive member, e.g. a conductive coating, between and in contact with a pair of spaced bus bars having different lengths. Selected portions of the coating between the bus bars are segmented to reduce the difference in watt density between the coatings at the bus bars when current moves through the coating. In one non-limiting embodiment, the width of the segments at the longer bus bar is less than the width of the segments at the longer bus bar. With this configuration, the watt density at the bottom of the windshield is increased to more efficiently remove ice and snow. In another non-limiting embodiment, the coating has a communication window to pass frequencies of the electromagnetic spectrum, e.g. RF frequencies, to obtain information from within the vehicle. The coating surrounding the conductive window has break lines to segment the coating to eliminate hot spot around the periphery of the communication window.
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Evans Robin
Fastovsky L.
PPG Industries Ohio Inc.
Siminerio Andrew C.
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