Device for heating air, fluids and materials, in dry or wet...

Electric heating – Heating devices – With heating unit structure

Reexamination Certificate

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Details

C219S541000, C392S438000, C392S439000, C338S307000, C338S308000

Reexamination Certificate

active

06963054

ABSTRACT:
A device for heating air, fluids and materials, in dry or wet environments powered in low voltage current or alternating or direct very safe allowable voltage, by increasing the temperature of any type of surface, whether flat or embossed, solid or open-work. The device includes electrodes coated with a layer of electrically resistant fluid or pasty substance. The assembly of devices is very thin, and is particularly designed for heating premises, swimming pools, pipes exposed to freezing, and container for warm food.

REFERENCES:
patent: 3798419 (1974-03-01), Maake
patent: 4151366 (1979-04-01), Betts et al.
patent: 4237366 (1980-12-01), Berg
patent: 4443691 (1984-04-01), Sauer
patent: 4485297 (1984-11-01), Grise et al.
patent: 4591701 (1986-05-01), Tokumaru
patent: 4697165 (1987-09-01), Ishiguro et al.
patent: 4931627 (1990-06-01), Watts
patent: 5206482 (1993-04-01), Smuckler
patent: 5285049 (1994-02-01), Fukumoto et al.
patent: 6392209 (2002-05-01), Oppitz
patent: 0 641 845 (1995-03-01), None
patent: 2 709 590 (1995-03-01), None

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