Combined With Radiation Patents (Class 392/375)
  • Patent number: 10895186
    Abstract: A honeycomb body includes: a first end face; a second end face, the honeycomb body being configured to permit gas flow through the honeycomb body from the first end face to the second end face in a flow direction; and a plurality of at least partially structured sheet metal layers, layered one on top of the other and entwined with each other to form gas-permeable channels. At least one of the plurality of sheet metal layers is reinforced or replaced by at least two elongate electrical heating elements arranged approximately parallel to one another with a spacing one behind the other in the flow direction and extending transversely to the flow direction.
    Type: Grant
    Filed: July 18, 2017
    Date of Patent: January 19, 2021
    Assignee: Vitesco Technologies GmbH
    Inventors: Peter Hirth, Christoph Pabst
  • Patent number: 10288288
    Abstract: A gas heating device includes a main body defining a combustion chamber, a catalyst disposed in the combustion chamber, and an electric thermal device providing electric thermal energy to heat the catalyst and disposed in the combustion chamber and adjacent to a side of the catalyst.
    Type: Grant
    Filed: November 28, 2016
    Date of Patent: May 14, 2019
    Assignee: Pro-Iroda Industries, Inc.
    Inventor: Cheng-Nan Yang
  • Patent number: 9204494
    Abstract: A heater assembly in an air conditioning unit includes one or more first heating elements characterized by a first wattage density, and one or more second heating elements characterized by a second wattage density. The second wattage density is greater than the first wattage density. The one or more second heating elements are interspersed with the one or more first heating elements.
    Type: Grant
    Filed: December 3, 2012
    Date of Patent: December 1, 2015
    Assignee: General Electric Company
    Inventor: Robert Jules Lafleur
  • Patent number: 9036986
    Abstract: A heater comprising a housing including an intake aperture and an output aperture. The heater includes a heat exchanger operatively disposed within the housing between the intake aperture and the output aperture. The heat exchanger includes a shell forming a cavity therein, wherein an interior surface of the shell is substantially black in the infrared domain. The heater includes an infrared emission module disposed within the cavity of the heat exchanger and substantially enclosed thereby such that emitted infrared light does not escape therefrom. The infrared emission module includes a first infrared emitter and a second infrared emitter. The heater includes a fan positioned to motivate air into the housing through the intake aperture, across the heat exchanger, and out of the output aperture. The heater also includes a power module functionally coupled to the infrared emission module and the fan and configured to provide operational power thereto.
    Type: Grant
    Filed: March 21, 2012
    Date of Patent: May 19, 2015
    Inventor: Bruce Amberson
  • Patent number: 8971695
    Abstract: A heater is provided with a heater core having a source of thermal energy in a heat exchange relationship with a heat exchanger. A fan moves air through the heater core from an air inlet to an air outlet. The heater core is thermally insulated by an air jacket from an exterior case.
    Type: Grant
    Filed: April 7, 2010
    Date of Patent: March 3, 2015
    Assignee: Suarez Corporation Industries
    Inventors: Neil R. Tyburk, Patrick M. Nolan
  • Publication number: 20150030318
    Abstract: An air conditioning apparatus is provided with an air plenum in fluid communication with an air inlet and an air outlet. A fan moves air through the air plenum. An interchangeable air conditioning core is removably installed within the air plenum and interposed between the air inlet and air outlet such that air moving along an air pathway is forced to proceed through the interchangeable air conditioning core.
    Type: Application
    Filed: October 15, 2014
    Publication date: January 29, 2015
    Inventor: Neil R. Tyburk
  • Publication number: 20140355968
    Abstract: The present invention relates to an electrothermal system which comprises at least one electrothermal equipment used to emit infrared radiation, a control unit used to control the operation of the electrothermal equipments. By using the control unit, some specified electrothermal equipments can be enabled to heat up some specified regions while the other electrothermal equipments will not operate. The present invention can reduce power consumption for only heating up demanded local regions and improving efficiency of electricity utilization.
    Type: Application
    Filed: May 28, 2013
    Publication date: December 4, 2014
    Inventors: Shang-Lin Tsai, Chih-Ming Hsu, Huang-Sheng Liu, Yung-Hui Hung, Cheng-Pi Lee
  • Patent number: 8467668
    Abstract: An infrared, room heater system for installation in a wall or on a floor. An electric fan assembly draws room air into a housing, then through three parallel, air transit channels where the air is heated by infrared radiation within and about a heat exchanger assembly, and then back out into the room. One or more ceramic heating elements attached to a first copper plate emit infrared radiation when electrically energized. The first copper plate lies adjacent to, but spaced away from, a second copper plate such that radiation emitted from the heating elements reflects back and forth between the plates. Room air passed between the copper plates is heated by heat radiation concentrated between the plates, thereby achieving both energy and space efficiency.
    Type: Grant
    Filed: October 29, 2007
    Date of Patent: June 18, 2013
    Assignee: Acepower Logistics, Inc.
    Inventors: Bruce R. Searle, Alexander Anderson
  • Patent number: 8326135
    Abstract: A portable area heating apparatus that utilizes a heat lamp for the heat source and a rear-situated fan to disperse the heated air is herein disclosed. The apparatus is intended for use in spot heating applications such as garages, workshops, and similar locations and is suitable for mounting on a floor or wall by use of a multi-functional bracket assembly. Since the heat lamp also produces a certain amount of light, the apparatus may also be used as a light source. The apparatus could also be mounted within an existing ductwork system to supplement a conventional central heating system in areas where extra heat is needed.
    Type: Grant
    Filed: January 26, 2009
    Date of Patent: December 4, 2012
    Inventor: Kent W. Gose
  • Patent number: 8129662
    Abstract: A portable heater (100) is provided. The portable heater (100) comprises an air inlet (108) and an air outlet (118). The portable heater (100) also comprises a heating chamber (115) including one or more heating elements (230). A preheating chamber (114) is provided that is located between the air inlet (108) and a heating chamber inlet (116).
    Type: Grant
    Filed: January 6, 2009
    Date of Patent: March 6, 2012
    Assignee: Reliable Products International
    Inventors: Norman Cameron, Dennis Cook
  • Patent number: 7923667
    Abstract: Electric Room Heater in its housing contains heaters which consist of strip of oriented cold rolled transformer sheet that are cooled by natural air circulation. Heater consists of two cross supports (11) connected by a central support (14). Between the cross supports are placed non-flammable insulating holders (13). The insulating holders have sprockets. Between sprockets lies strip of the heater of oriented cold rolled transformer sheet (12). The insulating holder (13) by its width (17) creates distance between layers of heater strips, and by sprockets width (18) makes distance between adjacent strips, windings, in the layer. These distances make channels for air circulation, thus enabling strip temperature to be less then 100° C.
    Type: Grant
    Filed: August 18, 2006
    Date of Patent: April 12, 2011
    Inventors: Ratko Isidorovic, Janko Isidorovic, Ksenija Isidorovic
  • Publication number: 20090285567
    Abstract: An infrared, room heater system for installation in a wall or on a floor An electric fan assembly draws room air into a housing, through three parallel, air transit channels where the air is heated by infrared radiation within and about a heat exchanger assembly, and thence back out into the room One or more ceramic heating elements attached to a copper plate incorporate a resistive conductor that causes the elements to emit infrared radiation when electrically energized The first copper plate lies adjacent to, but spaced away from, a first heat insulated housing sidewall, thereby defining a first air transit channel The second air transit channel is defined by the space between the second copper plate and the second housing sidewall, and the third air transit channel is defined by the space between the two copper plates.
    Type: Application
    Filed: October 29, 2007
    Publication date: November 19, 2009
    Inventors: Bruce R. Searle, Alexander Anderson
  • Patent number: 7539400
    Abstract: An improved electric radiator filled with oil includes a plurality of radiating fins, an electric-control box and a heater. Within the electric-control box, a switch, a temperature controller, a heat protector and a wire are provided. The radiating fin is hollow and sheet-like with at least two grooves therein for leading oil. The upper and lower ends of the fins are provided with hollow connecting-sleeves, oil-inflow holes are formed inside the connecting-sleeves. Each of the radiating fins is communicated with the oil-inflow hole and is filled with oil. Either the upper and the lower ends of each radiating fin are in different vertical planes, or the upper and the lower ends of each radiating fin are in a same vertical plane, but at least a part of the middle of each radiating fin is curved to form a convex configuration towards the side. Each of the radiating fins has the same shape and dimensions.
    Type: Grant
    Filed: December 13, 2004
    Date of Patent: May 26, 2009
    Inventor: Guoning Yao
  • Patent number: 7132627
    Abstract: Heating device having an electric heating body arranged within an accumulator block. The electric heating body includes an insulated flat resister. The accumulator block is structured and arranged to store calories. The heating device is adapted for use in a heating apparatus. This Abstract is not intended to define the invention disclosed in the specification, nor intended to limit the scope of the invention in any way.
    Type: Grant
    Filed: August 14, 2002
    Date of Patent: November 7, 2006
    Inventor: Bernard Peyronny
  • Patent number: 7046918
    Abstract: A space heater with a linear source of infrared radiant energy in heat exchange relationship with a heat exchanger formed of copper or aluminum material. The copper is pretreated to soften the copper and partially blacken the surface thereof. The aluminum is anodized and electrolytically colored dark. The space heater is thermally more efficient than a comparable space heater wherein the copper or aluminum has not been pretreated. The linear source of infrared radiant energy and heat exchanger are mounted in a heater core that is thermally insulated by an air jacket from an exterior case.
    Type: Grant
    Filed: November 23, 2004
    Date of Patent: May 16, 2006
    Assignee: MHE Corp.
    Inventors: William W. Burkett, Glenda Sue Burkett
  • Patent number: 6993253
    Abstract: A heating apparatus has a spectral selective type heat radiating material having a high emissivity in a specific wavelength region. A film of the spectral selective type heat radiating material is formed on a surface of a heat radiant while leaving at least one region of the surface of the heat radiant with nothing formed thereon. The film is applied so it is possible to identify whether or not the heating apparatus is operating and to prevent the temperature of a surface of the heat radiant from rising excessively. The spectral selectivity of spectral emissivity is controlled by adjusting the thickness of the film of the spectral selective type heat radiating material.
    Type: Grant
    Filed: November 10, 2003
    Date of Patent: January 31, 2006
    Assignee: National Institute of Advanced Industrial Science and Technology
    Inventor: Masato Tazawa
  • Patent number: 6965731
    Abstract: A conventional radial electric warmer includes an upper and a lower support base, plural heaters, a protective net, and an upper, a front and a rear cover. The upper and the lower support base respectively have a fixing frame for the heaters, and plural holes for hot air to flow out. The heaters respectively consist of plural heating pieces secured at the outside of the upper and the lower support base with the fixing frames with bolts. The protective net is secured at the front side of the heaters, secured stably by the upper and the lower support base. The upper, the front and the rear cover are respectively secured at the upper side, the front side and the rear side of the upper and the lower support base. Further, two foot frames are fixed under the lower support base to keep the warmer standing on the ground. Then the warmer is very safe to use and highly effective.
    Type: Grant
    Filed: February 9, 2004
    Date of Patent: November 15, 2005
    Inventors: Chuan-Pan Huang, Chen-Lung Huang
  • Patent number: 6941675
    Abstract: Devices and methods of drying hair are provided. The devices and methods of the present invention employ a material or a combination of materials capable of emitting far infrared radiation and negative ions during hair drying.
    Type: Grant
    Filed: October 1, 2002
    Date of Patent: September 13, 2005
    Inventor: Fred M. Slingo
  • Patent number: 6816668
    Abstract: A phase shifter element for selectively varying the phase of signals of desired frequencies or frequency range passing through an adjacent transmission line associated with, for example, an antenna array to electrically down-tilt the array's electromagnetic wave pattern. The phase shifter element comprises a planar dielectric member having at least three discrete coplanar interactive segments extending from an edge thereof and arranged to movably overlap the adjacent transmission line to vary its dielectric constant. Optimum dimensions of each interactive segments and optimum widths of gaps defined by opposite edges of adjacent segments being determined by a computer optimisation program, such that the phase shifter element achieves a wide operating frequency and minimum aggregate reflection.
    Type: Grant
    Filed: December 6, 2001
    Date of Patent: November 9, 2004
    Assignee: Alcatel
    Inventors: Noel McDonald, Charlie G. Williams
  • Publication number: 20030164367
    Abstract: A dual source heater with radiant and convection heaters operates to provide radiant and convective heat for heating a surrounding space. A quartz heating element provides radiant heat, and a resistive heating element provides convective heat, through openings in the heater housing. A reflector is positioned so that an airflow updraft is created within the housing and airflow is concentrated through the resistive heating element.
    Type: Application
    Filed: February 23, 2001
    Publication date: September 4, 2003
    Inventors: Charles E. Bucher, John C. Bucher
  • Patent number: 6481116
    Abstract: A hair dryer employing a radiator made of a ceramic adapted when heated to radiate far-infrared radiation comprises an elongate body, which has an inlet end defining an inlet and an outlet end defining an outlet, a fan, which is adapted when driven to draw air into the inlet, to move air through the elongate body, and to blow air from the outlet, an electrical motor, which is adapted when energized to drive the fan, and an electrical heater, which is mounted within the elongate body, between the fan and the outlet. The ceramic radiator is configured as a grille having plural apertures, through which air can flow when moved through the elongate body by the fan when energized. As and where a flow modifier, such as a flow concentrator, would be otherwise mounted, the ceramic radiator is mounted to the elongate body, at or near the outlet end, within the outlet, via a generally tubular adapter.
    Type: Grant
    Filed: April 18, 2001
    Date of Patent: November 19, 2002
    Inventor: Fred M. Slingo
  • Patent number: 6378225
    Abstract: Employing a radiator made of a ceramic adapted when heated to radiate far-infrared radiation, a hair dryer comprises an elongate body, which has an inlet end defining an inlet and an outlet end defining an outlet, a fan, which is adapted when driven to draw air into the inlet, to move air through the elongate body, and to blow air from the outlet, an electrical motor, which is adapted when energized to drive the fan, and an electrical heater, which is mounted within the elongate body, between the fan and the outlet. The ceramic radiator, which is tubular, is mounted within the elongate body, between the fan and the outlet and near the electrical heater, which is configured as an elongate coil deployed around the ceramic radiator and which is adapted when energized to heat air pulled through the elongate body by the fan and to heat the ceramic radiator.
    Type: Grant
    Filed: April 2, 2001
    Date of Patent: April 30, 2002
    Inventor: Fred M. Slingo
  • Patent number: 6351602
    Abstract: An upright radiant electrical heater has a reflector assembly supporting a vertically-extending heating element assembly that radiates energy through substantially 360 degree. The reflector assembly includes heat reflective panels that disperse heat horizontally over substantially 90 degrees through an open grill at the front of the heater and vertically in a substantially uniform manner so that hot spots are avoided. A fan forces room air into the heater from below the reflector assembly, upwardly through an air passage behind the assembly into an open control chamber at the top of the heater, and outwardly into the room through ducts along the top front edge of the assembly. A thermostatic control for the heating element assembly and the fan motor is located in the air passage at the top of the heater. The flowing air maintains the exterior of the heater relatively cool to the touch, allowing parts of the housing to be molded from a thermoplastic material into aesthetically-pleasing shapes.
    Type: Grant
    Filed: July 14, 1995
    Date of Patent: February 26, 2002
    Assignee: The W. B. Marvin Manufacturing Company
    Inventors: David B. Chaney, Barry W. Smith, Thomas H. Mills
  • Patent number: 6327427
    Abstract: An electric space heater uses the heat generated by quartz-halogen lamps to heat air which may be supplied to heat a local space. The heater conducts air through a heater enclosure in which the lamps are installed. The air path is parallel to the longitudinal axis of the lamps. The air is warmed by conduction from the surface of the lamps and from heated walls surrounding the lamps and which form the air flow path. The walls are heated by radiation from the lamps. The flow path for the heated air and the placement of the heated walls substantially isolate the outer portion of the heater enclosure from the heat generated by the lamps to maintain the temperature of the outer surface of the space heater at or near ambient temperature. The walls also confine the light generated by the lamps to the interior of the space heater. The air flow through the space heater is assisted by an electric fan.
    Type: Grant
    Filed: June 16, 2000
    Date of Patent: December 4, 2001
    Assignee: MHE Corp.
    Inventor: William W. Burkett
  • Patent number: 6169851
    Abstract: A space heater is disclosed, comprising a housing, a heat source within the housing and a plurality of openings to allow the convection of air through the housing, in which: the heat source comprises a pair of panels defining between them a closed compartment, a liquid within and partially filling the compartment and an electrical heating element extending within the compartment, substantially parallel to the panels and in thermal contact with the liquid; the compartment is sub-divided into a lower liquid chamber and an upper expansion chamber and the cross-sectional area of the liquid chamber where it meets the expansion chamber is less than that of the expansion chamber; and the openings in the housing allow radiant heat from the heat source to escape from the housing. In further embodiments, the lower liquid chamber contains liquid at room temperature, but the upper expansion chamber does not.
    Type: Grant
    Filed: July 29, 1999
    Date of Patent: January 2, 2001
    Assignee: Basic Patents
    Inventors: Martin Lawrence Naughton, Ronald Michael Warren, Arthur Joseph Patrick Purton
  • Patent number: 6167196
    Abstract: A portable electric space heater having a power cord with a male electrical plug and having easily replaceable quartz heating elements so that an unskilled person can remove and replace a heating element with a minimum of time, tools and skill. The heating elements are removably mounted by sockets within the heater housing behind a grill. One edge of the grill is pivotally connected to the housing and an opposite edge is connected to the housing by a latch member formed on the grill. Access to the heating elements can be obtained by unlatching the grill using the male plug as a tool.
    Type: Grant
    Filed: January 9, 1998
    Date of Patent: December 26, 2000
    Assignee: The W. B. Marvin Manufacturing Company
    Inventors: Charles A. Huggins, Jr., Kostas Kaplanis, Barry W. Smith, Larry L. McGrain, James B. Johnson, Thomas H. Mills
  • Patent number: 6091888
    Abstract: An appliance includes a housing defining an air inlet and an air outlet facing opposite to the air inlet, an inlet detector for detecting objects in an inlet zone projecting away from the inlet and an outlet detector for detecting objects in an outlet zone projecting away from the outlet. Also included is a control for deactivating the appliance in response to detection of objects in either of the inlet or outlet zones.
    Type: Grant
    Filed: January 6, 1997
    Date of Patent: July 18, 2000
    Assignee: Honeywell Consumer Products, Inc.
    Inventors: Rodney B. Jane, John Longan, Jui-Shang Wang, Steven L. Hecker, Walter Birdsell
  • Patent number: 6054692
    Abstract: In a heating device used for melting snow on a road, a roof or the like, or for room heating of in-door facilities, in order to heat a to-be-heated or heated object uniformly over its entire area and enable to utilize effectively a PTC heater, a heat diffusing plate 14 for diffusing heat generated from a heat generating body 16 is arranged on an upper face of the heat insulating member 12 and the heating body 16 is arranged in a recess portion 13 installed on its upper face. The heating body 16 is constituted by inserting a heat generating element 4 mounted with heat radiating plates 5 into a vessel 2 enclosed with a heat storing agent 3 of a latent heat absorbing type in a state in which the heat generating element is brought into contact with the heat storing agent 3.
    Type: Grant
    Filed: January 22, 1999
    Date of Patent: April 25, 2000
    Assignees: Takehiko Hitomi, Mitsukazu Ogawa
    Inventors: Takehiko Hitomi, Mitsukazu Ogawa, Toshio Saburi
  • Patent number: 5793019
    Abstract: An infra-red and forced air oven for drying a freshly painted object. The drying oven has a plurality of heating elements, which radiate infra-red energy, disposed about the object to be dried. Each heating element preferably has an annular shell, an electrically conductive coil carried by the shell, and an air passage through the shell through which air is forced by a fan. Electricity is provided to the electrically conductive coil which becomes heated and thereby heats the shell and radiates heat and infra-red energy into the oven. The fan forces air through the air passage of the shell so that heated air flows to the interior of the oven. Thus, the oven provides both radiant energy and forced air to dry an object within the oven.
    Type: Grant
    Filed: October 23, 1996
    Date of Patent: August 11, 1998
    Assignee: DriQuik, Inc.
    Inventors: David Frederick Boyle, Thomas Alan Cherry, Gary Louis Solgere
  • Patent number: 5761377
    Abstract: A portable heater providing both radiant and forced air heat includes a plurality of vertically oriented, horizontally spaced apart quartz heating tubes is partially surrounded by a common reflector configured to open at an obtuse angle at each quartz tube. The reflector is perforated to allow air to pass out from the interior of the heater. A housing surrounds the reflector and heating elements. A fan located toward the top of the heater draws air inward and down the channels behind the reflector from which it emerges past the heating elements. Control knobs for controlling a thermostat and output power level are located at the top surface of the housing. The heater also has automatic safety controls for shutting off power in the event the heater tips over or overheats, and an overcurrent device.
    Type: Grant
    Filed: October 22, 1996
    Date of Patent: June 2, 1998
    Assignee: Holmes Products Corporation
    Inventors: Robert E. Wolfe, Johnson Hsu, Dov Z. Glucksman, Karl Weidemann
  • Patent number: 5437001
    Abstract: An upright radiant electrical heater has a reflector assembly supporting a vertically-extending heating element assembly that radiates energy through substantially 360 degree. The reflector assembly includes heat reflective panels that disperse heat horizontally over substantially 90 degrees through an open grill at the front of the heater and vertically in a substantially uniform manner so that hot spots are avoided. A fan forces room air into the heater from below the reflector assembly, upwardly through an air passage behind the assembly into an open control chamber at the top of the heater, and outwardly into the room through ducts along the top front edge of the assembly. A thermostatic control for the heating element assembly and the fan motor is located in the air passage at the top of the heater. The flowing air maintains the exterior of the heater relatively cool to the touch, allowing parts of the housing to be molded from a thermoplastic material into aesthetically-pleasing shapes.
    Type: Grant
    Filed: December 21, 1992
    Date of Patent: July 25, 1995
    Assignee: The W. B. Marvin Manufacturing Company
    Inventors: David B. Chaney, Barry W. Smith, Thomas H. Mills
  • Patent number: 5400431
    Abstract: A method and apparatus of making an artificial flower resembling a dried flower, in which the artificial flower has a plurality of petals made from a fabric, each petal having an upper end with a tip, in which the tips of the petals are heated to a temperature sufficient to melt the fabric in the region of the tips by a heating assembly including a heating coil and a blower, and the petals in areas thereof other than the tips, are protected from the heat to prevent melting thereof, by placing the artificial flower in a recess of a heat sink body such that only the tips thereof protrude from the heat sink body, and as a result, a shrivelled, dried-up appearance is imparted to the artificial flower.
    Type: Grant
    Filed: May 18, 1993
    Date of Patent: March 21, 1995
    Assignee: United Chinese Plastics Products Co., Ltd.
    Inventor: George Y. S. Koo
  • Patent number: 5140812
    Abstract: There is provided an improved core for an electrically heatable catalytic converter, and an electrically heatable catalytic converter containing such core, said core characterized by having a plurality of subcircuits in which the heater strips of thin high temperature resistive metal alloy are in parallel and connected between an outer shell segment and a central structural member, and the plurality of such subcircuits is connected in series, whereby the resistance between the terminals of the electrically heatable catalytic converter is effectively raised.
    Type: Grant
    Filed: November 5, 1991
    Date of Patent: August 25, 1992
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Richard C. Cornelison, Martin B. Sherwin
  • Patent number: 5117481
    Abstract: A detachable bathing unit for far infrared bath, comprised of a base panel at the bottom, a first front panel and a second front panel bilaterally disposed at the front, a door panel disposed at the front between the first and second front panels, a first side panel disposed at one side, a second side panel disposed at an opposite side, a first back panel and a second back panels disposed at the back, a top panel disposed at the top and an electric control box mounted on the top panel at the top. The base, front, side, back and top panels are respectively connected into shape by means of tongue-and-groove joint and tenon-and-mortise joint so that they can be conveniently detached when not in use.
    Type: Grant
    Filed: July 30, 1991
    Date of Patent: May 26, 1992
    Inventor: Lai M. Sung
  • Patent number: 4987290
    Abstract: An infrared panel heater includes a housing having a gas inlet and a gas discharge opening covered by a porous metal panel. An electric heating element is disposed in the housing between the panel and the gas inlet for heating the panel for emission of infrared radiation therefrom. A plurality of spaced, parallel gas stream distributor plates are disposed in the housing between the heating element and gas inlet and are each provided with a plurality of openings forming the sole flow path for gas from the inlet to the discharge opening. The openings in each plate are uniform in diameter with the diameter of the openings in the respective plates decreasing as the plate is situated closer to the heating element so that a uniform gas distribution is achieved across the entire panel area. The outer surface of the panel may be coated with a porous ceramic infrared emitting layer.
    Type: Grant
    Filed: March 9, 1989
    Date of Patent: January 22, 1991
    Assignee: Senju Metal Industry Co., Ltd.
    Inventor: Tetsuya Okuno