U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Vaporizing unit

Patent 4853517 Issued on August 1, 1989. Estimated Expiration Date: Icon_subject March 28, 2008. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

3872280

Fumigating method and apparatus
Patent #: 4163038
Issued on: 07/31/1979
Inventor: Nishimura ,   et al.

Heating device having an optimized heating element of PTC thermistor material
Patent #: 4177375
Issued on: 12/04/1979
Inventor: Meixner

Heater with a ferro-electric ceramic heating element
Patent #: 4223208
Issued on: 09/16/1980
Inventor: Kleinschmidt ,   et al.

Atomizer burner for oil firing plant
Patent #: 4354822
Issued on: 10/19/1982
Inventor: Madsen ,   et al.

Heater clamping arrangement for electrically heated boilers
Patent #: 4700050
Issued on: 10/13/1987
Inventor: Hennuy ,   et al.

Electric fogger
Patent #: 4703155
Issued on: 10/27/1987
Inventor: Suhajda

Electrical device for vaporizing volatiles
Patent #: 4725712
Issued on: 02/16/1988
Inventor: Schroeder

Insecticide dispenser with a PTC heater Patent #: 4731522
Issued on: 03/15/1988
Inventor: Manchester

Inventors

Assignee

Application

No. 07/174460 filed on 03/28/1988

US Classes:

392/390, With disposable evaporant cartridge or container219/504, Comprising variable resistance means219/505, Comprising nonlinear or negative temperature coefficient resistance means219/530, With heat storage or transfer means (vanes)392/392Wall mounted

Examiners

Primary: Walberg, Teresa

Attorney, Agent or Firm

International Classes

H05B 3/14 (20060101)
A61L 9/03 (20060101)
A61L 9/015 (20060101)

Abstract

An electrically energized vaporizing unit for medications, room deodorizers, room scenting compounds, room insecticides, and the like, which is simple and inexpensive in its construction and which is compact in size. The vaporizing unit includes a housing having a central slot for holding a compressed paper fiber pad which is impregnated with the substance to be vaporized. The pad is heated by a pair of electrical heating elements which are located in the housing and positioned on opposite sides of the slot for maximum vaporizing efficiency of the pad. The housing may also contain paraffin wax. The melting point of the wax is selected to correspond to the vaporizing temperature of the particular substance in the pad. The vaporizing unit is provided with an electric plug which may be directly plugged into an electric receptacle to energize the PTC heating elements, and it does not require a switch or protective thermostat.

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