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Felix Hoffmann, a German chemist, was searching for something to relieve his father's arthritis. In doing so, he "rediscovered" acetylsalicylic acid and in 1900, patented a stable process for developing it. Hence, we have aspirin.
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| Number | Title | Issue Date |
| 7337745 | Electrode, susceptor, plasma processing apparatus and method of making the electrode and the susceptor A susceptor 24 includes a heater 38 disposed in a planar state, upper and lower ceramic-metal composites 40A and 40B disposed so as to sandwich the heater 38 from above and from below, and a ceramic electrostatic chuck 28 fo... | 03/04/2008 |
| 7208703 | Cooking top plate A substrate is made of a crystallized glass having translucency and an average linear thermal expansion coefficient of −5×10−7/° C. at 30 to 500° C. The substrate has a first surface (working surface) of a smooth surface having a surface roughness ... | 04/24/2007 |
| 7057139 | Electric heating assembly An electric heating assembly comprises a plate (2) having a front face (4) and a rear face (10), and at least one electric heater unit (8) located at the rear face (10) of the plate (2). The electric heater unit (8) i... | 06/06/2006 |
| 6976371 | Portable food cooling container A portable refrigeration apparatus includes a base defining an open interior cavity. An electric refrigeration unit is operably disposed in the base for cooling the contents of the interior cavity. A food container is configured to be removably disposed within the i... | 12/20/2005 |
| 6967312 | Semiconductor manufacturing/testing ceramic heater, production method for the ceramic heater and production system for the ceramic heater A process for producing a ceramic heater includes forming a resistance heating element on a surface of a ceramic substrate. The resistance heating element is divided into plural sections. Resistivities of the plural sections are measured, respectively. Each of the p... | 11/22/2005 |
| 6924464 | Ceramic heater and manufacturing method of ceramic heater A ceramic heater manufacturing method capable of preventing reflection of a laser beam at the time the performing trimming by irradiation using a laser beam and performing trimming of a resistance heating element or a conductor layer. The ceramic heater manufacturin... | 08/02/2005 |
| 6917021 | Heating apparatus with electrostatic attraction function There is disclosed a heating apparatus with electrostatic attraction function 1, comprising at least a supporting base 2, an electrode for electrostatic attraction 4 and a heating layer 5 that are formed on the supporting base, and an ins... | 07/12/2005 |
| 6897414 | Ceramic heater for semiconductor manufacturing/testing apparatus A ceramic beater for a semiconductor producing/examining device having a resistance heating element superior in adhesion to a substrate. The ceramic heater includes a ceramic substrate and a resistance heating element formed on the surface of the ceramic substrate. ... | 05/24/2005 |
| 6875957 | Glass or glass ceramic cooking top with an electrical heating unit A glass or glass ceramic cooking top 1 has on its underside 6 at least one heating unit 7. The heating unit 7 is in flat, heat-conducting contact with the underside 6, and contains an electrical resistance heating element exhibitin... | 04/05/2005 |
| 6815646 | Ceramic substrate for semiconductor manufacture/inspection apparatus, ceramic heater, electrostatic clampless holder, and substrate for wafer prober The present invention discloses a ceramic substrate for semiconductor manufacture and/or inspection conducive to decrease radiated α-rays and to minimize changes in thermal conductivity as a function of time, thereby yielding a superior temperature controllability.... | 11/09/2004 |
| 6753507 | Wafer heating apparatus In a ceramic heater having a plate-like body made of a ceramic, heating element in one main face of the plate like body, and an electric supply portion to be electrically connected with the heating element, it has been a problem that the temperature is uneven if ben... | 06/22/2004 |
| 6720533 | Heater assembly for heating a wafer A heater assembly of a semiconductor device manufacturing apparatus minimizes a temperature difference between a peripheral portion and a central portion of the wafer being processed in the apparatus. The heater assembly includes a unitary resistive heating member i... | 04/13/2004 |
| 6432207 | Method and structure for baking a wafer A method and structure for baking a wafer. A wafer is covered with a material layer and is located on a hot plate to perform a baking process. A plurality of spacers are located in between the wafer and the hot plate. The positions of the spacers are at t... | 08/13/2002 |
| 6361858 | Mounting for a cooking surface A mounting for a cooking surface held at its periphery by at least one support part comprising a fiberglass reinforced duromer or thermosetting resin selected from the group consisting of an unsaturated polyester resin, a melamine resin, a phenol resin, a... | 03/26/2002 |
| 6216334 | Electric heater and method of manufacture A flexible electric heater comprises a heat resistant support (4) of sheet or tape form having at least one electrical resistance heating element (1) secured thereto. The at least one heating element comprises a ribbon (2) of electrical resistance materia... | 04/17/2001 |
| 6018149 | Radiant electric heater A radiant electric heater has first, second and third heating zones (1, 2, 3) arranged substantially side-by-side. The first heating zone (1) is provided with at least one first heating element (9). The second heating zone (2) is arranged adjacent to the ... | 01/25/2000 |
| 6013902 | Radiant electric heater A novel radiant electric heater construction is provided employing fused silica particulates as the thermal and electrical insulation medium in said device. Said insulation means is prepared in a particular manner providing a porous characteristic when em... | 01/11/2000 |
| 5964145 | Griddle A griddle adapted for use in the food service industry. The griddle comprises a stainless steel griddle plate and a plurality of copper plates held against the underside of the griddle plate. High temperature grease is placed between the adjacent surfaces... | 10/12/1999 |
| 5665260 | Ceramic electrostatic chuck with built-in heater A ceramic electrostatic chuck with a built-in heater having electrodes of an electroconductive ceramic bonded to a surface of a supporting substrate of an electrically conducting ceramic. A heat generating layer of an electroconductive ceramic is bonded t... | 09/09/1997 |
| 5508495 | Domestic cooking apparatus A domestic cooking apparatus includes a layer of ceramic material having high temperature thermal shock resistance and a foil heating element disposed to heat at least a portion of the ceramic material to a temperature exceeding 200 degrees centigrade. A ... | 04/16/1996 |
| 5467695 | Device for preparing foods A table-like device is provided for preparing foods. A one-piece tabletop is made of stainless steel sheet metal. The tabletop has a central downward curvature. A heating device is arranged beneath the tabletop for heating the central region thereof. A pl... | 11/21/1995 |
| 5374807 | Domestic cooking apparatus A domestic cooking appliance having a housing whose top surface is formed with a flat cooking surface made from a layer of ceramic material of high thermal shock resistance capable of being heated to a temperature of at least 200° C. A foil heating eleme... | 12/20/1994 |
| 5345063 | Nestable stackable heated bowl with removable thermostatically controlled electric heating element An electrically heated molded plastic pet feeding bowl capable of being interengagedly stacked in nested relationship with similar bowls for shipment or storage has a removable electric heating unit insertable through an open bottom of the bowl into heat ... | 09/06/1994 |
| 5329097 | Compact substrate heater for use in an oxidizing atmosphere A compact heater is designed for the deposition of thin films at high temperatures in an oxidizing atmosphere or in vacuum. The heater is designed to accommodate a small-diameter load-lock system in an ultra-high-vacuum deposition chamber, and can operate... | 07/12/1994 |
| 5255595 | Cookie maker A cookie maker includes a housing having a lid and a base, a heat conducting element supported within the lid of the housing, a cookie pan disposed within the base of the housing, and a heating element supported within the housing and operative to heat th... | 10/26/1993 |
| 5221829 | Domestic cooking apparatus Domestic cooking apparatus including a layer of ceramic material having high temperature thermal shock resistance and defining a first surface which is a planar cooking surface and a second surface and a foil heating element disposed in intimate touching ... | 06/22/1993 |
| 5189282 | Thermal pads for heatable turntable A heatable turntable is provided for efficiently warming and serving food. A deck is rotatably mounted on a base. Electrical current is supplied from a power supply in the deck to thermal pads located in the deck via wires connected to sliding pole pieces... | 02/23/1993 |
| 5126533 | Substrate heater utilizing protective heat sinking means A substrate heater for the production of superconducting films utilizing a nickel alloy block uniformly heated with a resistance heating element fully immersed in a brazing material that fills a recess in the block. Massive electric power connectors surro... | 06/30/1992 |
| 4973826 | Glass-ceramic heating element Glass-ceramic heating element comprising at least a flat electric heating member which is provided on a glass-ceramic plate and can be heated to a temperature between ambient temperature and approximately 650° C. forming a heat source, wherein the electr... | 11/27/1990 |
| 4717810 | Electric hotplate An electric hotplate, particularly intended for continuous operation in commercial use, is provided on the bottom surface with at least two superimposed reflectors (24, 28), which in each case form the lower boundary of an insulating zone (29, 30) and whi... | 01/05/1988 |
| 4649263 | Heating kettle A heating kettle includes a pot having a bottom wall and a side wall, a heating element adapted to heat the pot, and a hold-down plate for holding the heating element against the bottom wall of the pot. The hold-down plate is secured to both the bottom wa... | 03/10/1987 |
| 4492853 | Electrically heated cooking or food heating devices Electrically heated cooking pans usually have a number of supporting legs, each of which is fixed individually to the underside of the pan. The assembly of such items is expensive and time-consuming and in addition failure of one leg can result in the who... | 01/08/1985 |
| 4410793 | Electric hotplate An electric hotplate (11) has a metal plate-like or inverted dish-shaped circular hotplate member (12) against whose bottom are pressed by spring elements (25) thin flexible tubular heaters (31), while interposing a multilayer insulation (28). A support d... | 10/18/1983 |
| 4286143 | Heater assembly Laminated heater plate assembly is formed from a plurality of layers of glass cloth and/or glass mat and epoxy resin which are laminated together under heat and pressure. One or more thermally conductive heater members are mounted in a cut-out region(s) i... | 08/25/1981 |
| 4270067 | Electric frying pan The invention relates to an improved frying pan providing good thermal contact between the pan bottom and the heating element, the device comprising a pan adapted with threaded studs to the underside thereof, a support plate adapted with a depression shap... | 05/26/1981 |
| 4254824 | Food preparation apparatus An apparatus for preparing cooked or heated meals includes a food and beverage cabinet having heater shelves which include spaced heater elements heated by film heater means with silicone rubber comprising the sole means for securing the film heater means... | 03/10/1981 |
| 4251713 | Electric heater assembly for diffusion pumps A diffusion pump includes a flat metal boiler plate having an upper face defining a floor for a pool of a vaporizable diffusion pump fluid or oil and a lower face against which the metallic sheath of a tubular electric heater is pressed by a coextensive m... | 02/17/1981 |
| 4160152 | Heating unit A heating unit is provided in the form of an open topped container with a side wall and a bottom. The side wall has a plurality of bosses each of which has a plate-receiving groove. The bottom has on its upper surface elongated seat defining flanges, a ba... | 07/03/1979 |
| 4147925 | Percolator partition plate heater assembly A percolator is provided with a preassembled partition plate heater assembly wherein a one-piece non-corrosive metal partition plate has a centrally located pump well. An annular heat distribution plate surrounds the well and is fixedly connected to a bot... | 04/03/1979 |
| 4142094 | Electrical appliance An electrical frying pan comprises a metallic cooking pan having a flat base against the undersurface of which there is held in close thermal contact a wire or foil type heating element by a body of thermally insulating material disposed above a metal pla... | 02/27/1979 |
