US3845266A - Microwave cooking utensil - Google Patents

Microwave cooking utensil Download PDF

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Publication number
US3845266A
US3845266A US00377663A US37766373A US3845266A US 3845266 A US3845266 A US 3845266A US 00377663 A US00377663 A US 00377663A US 37766373 A US37766373 A US 37766373A US 3845266 A US3845266 A US 3845266A
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US
United States
Prior art keywords
energy
load
microwave
utensil
supporting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00377663A
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English (en)
Inventor
P Derby
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Raytheon Co
Original Assignee
Raytheon Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Raytheon Co filed Critical Raytheon Co
Priority to US00377663A priority Critical patent/US3845266A/en
Priority to SE7407089A priority patent/SE395998B/xx
Priority to AU69572/74A priority patent/AU482735B2/en
Priority to CA201,490A priority patent/CA977424A/en
Priority to IT51363/74A priority patent/IT1013355B/it
Priority to ZA00743650A priority patent/ZA743650B/xx
Priority to NL7408067A priority patent/NL7408067A/xx
Priority to JP6881774A priority patent/JPS5314784B2/ja
Priority to DE2432488A priority patent/DE2432488A1/de
Priority to FR7423531A priority patent/FR2236454B1/fr
Priority to BE146343A priority patent/BE817389A/xx
Priority to CH935174A priority patent/CH581296A5/xx
Application granted granted Critical
Publication of US3845266A publication Critical patent/US3845266A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/6426—Aspects relating to the exterior of the microwave heating apparatus, e.g. metal casing, power cord
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/647—Aspects related to microwave heating combined with other heating techniques
    • H05B6/6491—Aspects related to microwave heating combined with other heating techniques combined with the use of susceptors
    • H05B6/6494—Aspects related to microwave heating combined with other heating techniques combined with the use of susceptors for cooking
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/66—Circuits
    • H05B6/68—Circuits for monitoring or control
    • H05B6/688—Circuits for monitoring or control for thawing
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/70—Feed lines
    • H05B6/705—Feed lines using microwave tuning
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/72—Radiators or antennas
    • H05B6/725—Rotatable antennas
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers

Definitions

  • ABSTRACT A utensil for microwave cooking including a load supporting means of a nonpermeable nondissipative material having a plurality of frequency responsive impedance matching energy transparent structures to expose a load to varying degrees of heating. Exterior load surfaces are differentially heated to achieve a browned and seared appearance in the areas of intense heating. Numerous configurations include slots, holes and slots, rectangular and diamond shaped openings. A body member having an energy transparent low loss region is provided to space the load from the oven enclosure conductive walls. A conductive cover is included in an alternative embodiment to enhance browning and searing.
  • the microwave heating apparatus includes the magnetron which is operated at conventional domestic low frequency line voltages.
  • the energy is fed within a conductive wall oven enclosure through a waveguide transmission line and the energy is distributed in a plurality of energy modes by such means as a mode stirrer.
  • the frequencies of operation are assigned by federal regulatory bodies and, typically are 915 i 13MHz and 2,450 i 50MHz.
  • microwave is defined as electromagnetic energy radiation having wavelengths in the order of 1 meter to l millimeter and frequencies in the order of 300MHz to 300GHZ.
  • the load placed in the oven enclosure becomes heated due to the interaction of the microwave fields within the material. ln accordance with the so-called dielectric heating phenomena, the molecules tend to oscillate under the influence of the high frequency electromagnetic energy fields. The friction created by the molecular movement causes the material to be heated. All materials have varying energy propagating characteristics and, therefore, the depth of penetration and surface coloration vary which requires consideration, particularly, in the preparation of the edible product loads. Because of the depth-of-penetration limitations it is sometimes difficult to achieve a seared or browned surface on such materials as steaks, fowl, roasts and the like.
  • Some microwave oven apparatus incorporate an electric or gas broiling element.
  • Certain food additives may be coated on the load prior to cooking of selected materials having higher energy absorbing characteristics which will lead to a more rapid heating of the exterior surfaces while the remainder of the food load achieves the desired tenderness.
  • Another factor to be considered is the selection of a cooking utensil since microwave energy is substantially shielded and reflected by conductive metallic materials and, therefore, microwave energy transparent materials, such as glass or plastic are preferred for microwave cooking.
  • U.S. Letters Pat. 2,830,162 issued Apr. 8, 1958, to D. A. Copson, et al., and assigned to the assignee of the present invention, utilizes a container constructed of a ferromagnetic-like material with the container absorbing the microwave energy when heated.
  • the material is responsive to the electromagnetic energy impinging thereon up to the Curie temperature point and, thereafter, it becomes substantially nonresponsive and pervious to the energy.
  • the ferromagnetic materials sustain alternating electric and magnetic fields and, characteristically, have high energy loss at temperatures below the Curie point.
  • Examples of such materials from which the food container is fabricated include alloys of manganese, tin, copper or manganese, aluminum and copper, as well as, alloys of iron and sulphur, such as pyrrhotite. Additionally, ferroelectric materials such as zircomates of lead and barium and titanates of lead, barium and strontium may be utilized.
  • the browning or searing surface conditions desired have been significantly improved by the disclosed utensils which, however, like the addition of the additional broiling elements, can be costly in the implementation.
  • a microwave cooking utensil having a member of a microwave permeable material, such as glass or Pyrex or Pyroceram, having a thickness selected to provide for the coupling of energy reflected from the oven enclosure wall into the utensil.
  • the article to be heated is supported on a member having a plurality of spaced energy frequency responsive impedance matching structures to permit coupling of energy into the load.
  • the heating pattern results in browning and searing in the areas of intense energy transmission.
  • the load supporting member comprises a nondissipating nonpermeable material having a perforated pattern or array of slots, holes and slots and the like achieve a desired microwave transparency.
  • a cover of a conductive material may be provided, completely enveloping the load during operation, to further enhance the outer surface coloration. Since the utensil is primarily nonabsorbing and nondissipative very little thermal heating will be achieved. The transfer of energy relies principally on adjustment of the energy coupling characteristics to differentially heat the load to cause elevated temperatures through the microwave transparent structures. The utensil is easily removed, cleaned and stored.
  • FIG. 2 is a vertical cross-sectional view of a microwave oven apparatus with the distribution of the microwave energy within the oven enclosure shown diagrammatically;
  • FIG. 2 A typical microwave oven apparatus is illustrated in FIG. 2.
  • Top and bottom conductive walls 12, as well as sidewalls l4 define the oven enclosure 16 having an access opening 18 closed by means of door assembly (not shown) which may be side or bottom-hinged.
  • a casing member 20 provided with a control panel member 22 surrounds the oven enclosure as well as the energy generator, controls and electrical apparatus.
  • the control panel member 22 provides for mounting timers 24 and 26, as well as start, stop and light buttons 28, 30 and 32.
  • Magnetron energy generator 34 is of the well known type, as described in the text Microwave Magnetrons," Radiation Laboratory Series, Vol. 6, by G. B. Collins, McGraw-Hill Book Co., Inc., 1948 and US. Pat. No. 3,53l,6l3 issued Sept. 29, 1970 to C. P. Domenichini, et al., and assigned to the assignee of the present invention.
  • the generated energy is coupled to the oven enclosure by means of antenna 36 extending into the launching rectangular waveguide section 38.
  • the waveguide launching section is closed at one end by a terminating wall 40, spaced a predetermined dimension from the antenna 36, for optimum launching and direction of the energy.
  • the opposing end of the waveguide launching section is provided with an open end 42.
  • the launched energy is distributed within the enclosure in a multimode heating pattern accomplished by such well-known means as a mode stirrer 46 having a plurality of paddle members 48 actuated by motor 50.
  • the rotation of the stirrer results in the reflection of the energy waves which bounce off the conductive walls at the ceiling, back side and bottom of the oven enclosure.
  • Load 52 is supported in a microwave energy permeable container 54 such as, a dish of a dielectric material which is in turn supported on a plate 56 of a similar material;
  • the spacing of the glass plate 56 from bottom wall 12 provides for the reflections of the waves 44 from the bottom wall member to enter and be absorbed by the load 52.
  • the distribution and reflection of the waves 44 provides for substantially uniform energy distribution throughout the load 52 with a minimum of hot spots.
  • the absorption of the microwave energy results in the conversion of a molecular movement within the load into heat for cooking.
  • Substantially uniform cooking is achieved in this manner commencing from the outer surface into the interior of the load.
  • the continued cooking with microwaves to achieve the outer surface coloration may result in the interior being overcooked and the loss of nutrient values.
  • taste as well as appeal is also improved by proper outer surface preparation.
  • the utensil 60 embodying the invention is shown disposed within the oven enclosure 16 comprising a body member having a microwave permeable material region 62.
  • the thickness of this region is selected to provide a spacing between an exemplary load 64, such as, illustratively, a steak, and bottom wall 12 to assure that the bouncing microwave energy waves will be coupled into the utensil.
  • Region 62 is fabricated from any of the dielectric or ceramic materials which are transparent to the microwave energy or the utensil 60 may be provided with legs.
  • the load 64 is supported on a nonpermeable, nondissipative material surface 66 having a plurality of spaced frequency responsive energy transmission structures, such as perforation 68.
  • the array of perforations 68 is selected to provide for differential heating by intense transmission rather than absorption and conduction by the microwaves entering through the transparent opening 68 to thereby establish a searing or browning condition by reason of the penetrating concentrated energy.
  • the load support surface 66 may be fabricated of stainless steel which is easy to clean; has a pleasing appearance and relatively long life.
  • the spacings between the perforations 68 are selected to provide for the maximum coupling of the electromagnetic waves radiation within the enclosure into the load without materially heating the intervening portions of plate 68.
  • the transfer of energy is thereby accomplished not by thermal absorption and conduction by surface 66 but rather an arrangement where the spaces provide for little or no attenuation of the energy.
  • This array is selected based on the anticipated varying dielectric constant load characteristics relative to the impedance characteristics of the waves within the enclosure at the operating frequency.
  • FIG. 4 another arrangement of the load supporting surface is shown comprising a grille 70 formed by a grid arrangement of elongated rods 72 and 74 interconnected in a mutually perpendicular manner.
  • This arrangement would provide for intense heating by coupling energy in accordance with teachings in the microwave transmission art, such as delay lines of the ladder-type or meander lines.
  • dumbbell resonant iris arrangement 80 comprising holes 82 and interconnecting slots 84.
  • This arrangement is similar to that found in the waveguide transmission art to provide combined inductances and capacitances in iris members utilized as impedance matching structures for devices such as those shown and described in the text Microwave Duplexers Radiation Laboratory Series, Vol. 14 by L. D. Smullin and C. G. Montgomery, McGraw-Hill Book Co., Inc., New York, 1948, Page 70.
  • Other examples of resonant openings are discussed in this text as well as the H-shaped arrangement 90 shown in FIG. 6 comprising parallel elongated slots 92 interconnected by a mutually perpendicular elongated slot 94.
  • the provision of these resonant structures which are highly pervious to the microwaves assures the provision of the desired heating patterns in accordance with the invention.
  • FIG. 7 a portion of a load support surface 100 is illustrated comprising diagonally arranged rods 102 and 104 in a substantially crisscross pattern to provide diamond shaped openings.
  • Cover 110 of a conductive material shown in FIG. 1 having a handle 112 provides for the further enclosing of the load supported on a surface having an array of microwave energy resonant structures comprising perforations, slots, square, diagonal or circular openings.
  • the coupling of the energy through the body member region 62 or legs and surface 66 openings will be further amplified by this cover to enhance browning and searing.
  • the cover will also prevent splattering on the oven walls.
  • an efficient microwave cooking utensil incorporating a nondissipative, nonpermeable support surface having a plurality of spaced energy transmission structures adapted to provide a selected differential heating pattern with a minimum of attenuation through the structure openings.
  • the utensil is easy to clean, as well as, to store, and provides for substantial searing or browning by the intense penetration of the microwave energy in selected regions of the load. Since numerous modifications, variations and alterations will be evident of those skilled in the art, the foregoing description is intended to be interpreted broadly rather than in a limiting sense.
  • a load supporting surface of a nontransparent, nondissipative material having a plurality of spaced frequency responsive impedance matching energy transmission structures arranged in an array to provide a transparency to couple said energy in a predetermined heating pattern.
  • a utensil according to claim 8 wherein said supporting surface comprises a grille including interconnected elongated metal rods having predetermined spacings for maximum energy transmission at the microwave apparatus operating frequency.
  • a utensil according to claim 8 wherein said supporting surface comprises a slotted metallic plate member with the slot dimensions and spacings being determined to provide maximum energy transmission at the microwave apparatus operating frequency.
  • a utensil according to claim 8 wherein said supporting surface comprises a metallic plate member having a plurality of slots with the dimensions and spacings being determined to provide maximum energy transmission at the microwave apparatus operating frequency.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electric Ovens (AREA)
  • Constitution Of High-Frequency Heating (AREA)
  • Cookers (AREA)
US00377663A 1973-07-09 1973-07-09 Microwave cooking utensil Expired - Lifetime US3845266A (en)

Priority Applications (12)

Application Number Priority Date Filing Date Title
US00377663A US3845266A (en) 1973-07-09 1973-07-09 Microwave cooking utensil
SE7407089A SE395998B (sv) 1973-07-09 1974-05-29 Anordning for uppberande av artiklar som ska behandlas med mikrovagsenergi
AU69572/74A AU482735B2 (en) 1973-07-09 1974-05-30 Microwave cooking utensil
CA201,490A CA977424A (en) 1973-07-09 1974-06-03 Microwave cooking utensil
IT51363/74A IT1013355B (it) 1973-07-09 1974-06-03 Perfezionamento nei forni a micro onde
ZA00743650A ZA743650B (en) 1973-07-09 1974-06-07 Microwave cooking utensil
NL7408067A NL7408067A (nl) 1973-07-09 1974-06-17 Kookinrichting met gebruikmaking van microgol-
JP6881774A JPS5314784B2 (enrdf_load_stackoverflow) 1973-07-09 1974-06-18
DE2432488A DE2432488A1 (de) 1973-07-09 1974-07-04 Vorrichtung zur abstuetzung von mittels mikrowellenenergie zu behandelnden gegenstaenden, insbesondere von in einem mikrowellenofen zu erhitzendem brat- oder backgut
FR7423531A FR2236454B1 (enrdf_load_stackoverflow) 1973-07-09 1974-07-05
BE146343A BE817389A (fr) 1973-07-09 1974-07-08 Ustensile pour la cuisson aux hyperfrequences
CH935174A CH581296A5 (enrdf_load_stackoverflow) 1973-07-09 1974-07-08

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US00377663A US3845266A (en) 1973-07-09 1973-07-09 Microwave cooking utensil

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US3845266A true US3845266A (en) 1974-10-29

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US00377663A Expired - Lifetime US3845266A (en) 1973-07-09 1973-07-09 Microwave cooking utensil

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US (1) US3845266A (enrdf_load_stackoverflow)
JP (1) JPS5314784B2 (enrdf_load_stackoverflow)
BE (1) BE817389A (enrdf_load_stackoverflow)
CA (1) CA977424A (enrdf_load_stackoverflow)
CH (1) CH581296A5 (enrdf_load_stackoverflow)
DE (1) DE2432488A1 (enrdf_load_stackoverflow)
FR (1) FR2236454B1 (enrdf_load_stackoverflow)
IT (1) IT1013355B (enrdf_load_stackoverflow)
NL (1) NL7408067A (enrdf_load_stackoverflow)
SE (1) SE395998B (enrdf_load_stackoverflow)
ZA (1) ZA743650B (enrdf_load_stackoverflow)

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3941967A (en) * 1973-09-28 1976-03-02 Asahi Kasei Kogyo Kabushiki Kaisha Microwave cooking apparatus
US3941968A (en) * 1975-03-27 1976-03-02 Raytheon Company Microwave browning plate
US3943320A (en) * 1975-06-19 1976-03-09 Raytheon Company Frankfurt searing tray for use with microwave energy
US3946187A (en) * 1975-03-03 1976-03-23 Raytheon Company Microwave browning utensil
US3946188A (en) * 1975-06-19 1976-03-23 Raytheon Company Microwave heating apparatus with browning feature
US4190757A (en) * 1976-10-08 1980-02-26 The Pillsbury Company Microwave heating package and method
US4398077A (en) * 1980-10-06 1983-08-09 Raytheon Company Microwave cooking utensil
EP0091779A3 (en) * 1982-04-07 1983-12-07 Matsushita Electric Industrial Co., Ltd. Microwave heater
US4653461A (en) * 1983-07-19 1987-03-31 Microwave Ovens Ltd. Trivet for a microwave oven
US4746968A (en) * 1987-03-30 1988-05-24 Mcdonnell Douglas Corporation Combined microwave and thermal drying apparatus
US4866234A (en) * 1985-06-25 1989-09-12 Alcan International Limited Microwave container and method of making same
US4952764A (en) * 1989-04-27 1990-08-28 Harrington Lawrence S Adjustable fin bacon rack for microwave oven
US4992638A (en) * 1988-06-22 1991-02-12 Alcan International Limited Microwave heating device with microwave distribution modifying means
US5117078A (en) * 1990-02-02 1992-05-26 Beckett Industries Inc. Controlled heating of foodstuffs by microwave energy
US5260537A (en) * 1991-06-17 1993-11-09 Beckett Industries Inc. Microwave heating structure
US5280150A (en) * 1988-03-14 1994-01-18 Sharp Kabushiki Kaisha Heat generating container for microwave oven
AU645777B2 (en) * 1990-02-02 1994-01-27 Beckett Industries Inc. Controlled heating of foodstuffs by microwave energy
US5296666A (en) * 1992-05-04 1994-03-22 The Pennsylvania Research Corporation Microwave heating apparatus having two cavities and method of using the same
US5331135A (en) * 1993-02-12 1994-07-19 Kansas State University Research Foundation Microwave baking pan
US5354973A (en) * 1992-01-29 1994-10-11 Beckett Industries Inc. Microwave heating structure comprising an array of shaped elements
US5519195A (en) * 1989-02-09 1996-05-21 Beckett Technologies Corp. Methods and devices used in the microwave heating of foods and other materials
US5593610A (en) * 1995-08-04 1997-01-14 Hormel Foods Corporation Container for active microwave heating
US5935477A (en) * 1996-07-22 1999-08-10 Kontract Product Supply Inc. Continuous microwave cooking grill having a plurality of spaced segments
US6229131B1 (en) 1996-07-22 2001-05-08 Kontract Product Supply, Inc. Microwave cooking grill and steamer
US6608292B1 (en) 2002-07-26 2003-08-19 Neal Patrick Barnes Microwave grilling appliance
FR2839630A1 (fr) 2002-05-15 2003-11-21 Rational Ag Support de produit a cuire ayant au moins une surface de contact.
US20050186311A1 (en) * 2004-02-23 2005-08-25 Loh Jimbay P. Method for acidifying and preserving food compositions using electrodialyzed compositions
US20050258173A1 (en) * 2004-05-21 2005-11-24 Maytag Corporation Microwave intensification system for a conveyorized microwave oven

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JPS49106539A (enrdf_load_stackoverflow) * 1973-02-09 1974-10-09
JPS49106540A (enrdf_load_stackoverflow) * 1973-02-09 1974-10-09
JPS50111643A (enrdf_load_stackoverflow) * 1974-02-12 1975-09-02
JPS5430676Y2 (enrdf_load_stackoverflow) * 1974-03-01 1979-09-26
JPS5387823A (en) * 1977-01-10 1978-08-02 Tanezou Tanaka Method of producing acrylic resin ruler
JPS5387824A (en) * 1977-01-10 1978-08-02 Tanezou Tanaka Method of producing ruler
JPS5393929A (en) * 1977-01-26 1978-08-17 Tanezou Tanaka Method of producing acrylic resin ruler
JPS5393930A (en) * 1977-01-26 1978-08-17 Tanezou Tanaka Method of producing acrylic resin ruler
JPS53106228A (en) * 1977-02-28 1978-09-16 Tanezou Tanaka Method of producing acrylic resin ruler
JPS53109721A (en) * 1977-03-07 1978-09-25 Tanezou Tanaka Method of producing acrylic resin ruler
US4173672A (en) * 1977-09-06 1979-11-06 Mannheim Jose R Decorated safety glass
JPS5836474B2 (ja) * 1978-06-13 1983-08-09 松下電器産業株式会社 高周波加熱装置
US4272663A (en) * 1979-08-10 1981-06-09 Green Robert E Method and apparatus for cooking
SE458493B (sv) * 1987-01-08 1989-04-03 Philips Norden Ab Mikrovaagsugn
EP0593088B1 (en) 1987-03-09 1998-01-07 Dai Nippon Insatsu Kabushiki Kaisha Intermediate film for use in a laminated glass sheet
JPH03502074A (ja) * 1988-10-28 1991-05-16 インスティチュト　エレクトロスバルキ　イメニ　イー．オー．パトナ　アカデミイ　ナウク　ウクラインスコイ　エスエスアール プラズマ発生装置

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FR1249130A (fr) * 1959-02-25 1960-12-23 Miwag Mikrowellen Ag Cuisinière électrique avec dispositif complémentaire à micro-ondes
DE1151611B (de) * 1961-04-13 1963-07-18 Siemens Elektrogeraete Gmbh HF-Strahlungsherd

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US3271552A (en) * 1963-02-01 1966-09-06 Litton Prec Products Inc Microwave heating apparatus
US3490580A (en) * 1968-07-29 1970-01-20 Robert C Brumfield Containers and process for asepsis

Cited By (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3941967A (en) * 1973-09-28 1976-03-02 Asahi Kasei Kogyo Kabushiki Kaisha Microwave cooking apparatus
US3946187A (en) * 1975-03-03 1976-03-23 Raytheon Company Microwave browning utensil
US3941968A (en) * 1975-03-27 1976-03-02 Raytheon Company Microwave browning plate
US3943320A (en) * 1975-06-19 1976-03-09 Raytheon Company Frankfurt searing tray for use with microwave energy
US3946188A (en) * 1975-06-19 1976-03-23 Raytheon Company Microwave heating apparatus with browning feature
US4190757A (en) * 1976-10-08 1980-02-26 The Pillsbury Company Microwave heating package and method
US4398077A (en) * 1980-10-06 1983-08-09 Raytheon Company Microwave cooking utensil
US4499356A (en) * 1982-04-07 1985-02-12 Matsushita Electric Industrial Co., Ltd. Microwave heater having a device for thawing frozen cakes
EP0091779A3 (en) * 1982-04-07 1983-12-07 Matsushita Electric Industrial Co., Ltd. Microwave heater
US4653461A (en) * 1983-07-19 1987-03-31 Microwave Ovens Ltd. Trivet for a microwave oven
US4866234A (en) * 1985-06-25 1989-09-12 Alcan International Limited Microwave container and method of making same
EP0206811B1 (en) * 1985-06-25 1992-04-01 Alcan International Limited Microwave container
US4746968A (en) * 1987-03-30 1988-05-24 Mcdonnell Douglas Corporation Combined microwave and thermal drying apparatus
US5280150A (en) * 1988-03-14 1994-01-18 Sharp Kabushiki Kaisha Heat generating container for microwave oven
US4992638A (en) * 1988-06-22 1991-02-12 Alcan International Limited Microwave heating device with microwave distribution modifying means
US5519195A (en) * 1989-02-09 1996-05-21 Beckett Technologies Corp. Methods and devices used in the microwave heating of foods and other materials
US4952764A (en) * 1989-04-27 1990-08-28 Harrington Lawrence S Adjustable fin bacon rack for microwave oven
US5117078A (en) * 1990-02-02 1992-05-26 Beckett Industries Inc. Controlled heating of foodstuffs by microwave energy
AU645777B2 (en) * 1990-02-02 1994-01-27 Beckett Industries Inc. Controlled heating of foodstuffs by microwave energy
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Also Published As

Publication number Publication date
BE817389A (fr) 1974-11-04
IT1013355B (it) 1977-03-30
JPS5038152A (enrdf_load_stackoverflow) 1975-04-09
JPS5314784B2 (enrdf_load_stackoverflow) 1978-05-19
AU6957274A (en) 1976-01-15
FR2236454B1 (enrdf_load_stackoverflow) 1978-06-16
FR2236454A1 (enrdf_load_stackoverflow) 1975-02-07
SE7407089L (enrdf_load_stackoverflow) 1975-01-10
ZA743650B (en) 1975-05-28
NL7408067A (nl) 1975-01-13
CA977424A (en) 1975-11-04
DE2432488A1 (de) 1975-01-30
SE395998B (sv) 1977-08-29
CH581296A5 (enrdf_load_stackoverflow) 1976-10-29

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