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...During the Civil War, the Confederacy established its own Patent Office which issued 266 patents, a third of which concerned implements of war.
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| Number | Title | Issue Date |
| 7405382 | System for microwave enhanced chemistry According to the present invention, a microwave generator includes a variable voltage provided from a first transformer to a second transformer having a secondary winding split into a filament winding cathode low AC signal and a secondary winding providing a high vo... | 07/29/2008 |
| 7388179 | Microwave radiating applicator with reduced sensitivity to surrounding media A microwave energy applicator radiating uniformly all around the applicator that maintains high efficiency Voltage Standing Wave Ratio (V.S.W.R.) for surrounding media of dielectric constants varying from about 1 to about 80. In a particular embodiment, the high eff... | 06/17/2008 |
| 7332697 | Photonic bandgap reflector-suppressor A computer-based design methodology for photonic bandgap devices that permits determination of both the upper and lower bandgap edges in either a one-dimensional or two-dimensional photonic crystal. Using this methodology, a one-dimensional crystal may be created fo... | 02/19/2008 |
| 7309843 | Plasma-assisted joining Methods and apparatus for plasma-assisted joining of one or more parts together are provided. The joining process may include, for example, placing at least first and second joining areas in proximity to one another in a cavity, forming a plasma in the cavity by sub... | 12/18/2007 |
| 7227097 | Plasma generation and processing with multiple radiation sources Plasma-assisted methods and apparatus that use multiple radiation sources are provided. In one embodiment, a plasma is ignited by subjecting a gas in a processing cavity to electromagnetic radiation having a frequency less than about 333 GHz in the presence of a pla... | 06/05/2007 |
| 7208710 | Uniform microwave heating method and apparatus A method and apparatus for creating uniform heating of an microwave absorptive target. A circularly polarized waveguide mode is created that promotes uniform heating of the microwave absorptive target by rotating a propagated non-uniform field pattern around a centr... | 04/24/2007 |
| 7165881 | Methods and apparatus for high-shear mixing and reacting of materials Methods and apparatus for high shear reacting and/or mixing of moving fluid streams of materials employ an interdiffusing and reacting zone formed in the space between two stationary surfaces, the surfaces being spaced apart a maximum distance of the sum of the thic... | 01/23/2007 |
| 7122772 | Microwave resonator and method of operating microwave resonator In an even numbered polygonal microwave resonator wherein a high mode microwave mode is formed and in the resonator volume a homogeneous field distribution is established for the thermal processing of workpieces, a microwave in-coupling structure pair is provided al... | 10/17/2006 |
| 7098360 | Processes employing multiple successive chemical reaction process steps and apparatus therefore The invention provides processes and apparatus for the production of materials requiring a plurality of chemical reaction steps. In the prior art the number of reaction vessels is minimized by performing two or more reactions together in the same vessel. Instead eac... | 08/29/2006 |
| 7091457 | Meta-surface waveguide for uniform microwave heating A method and apparatus for creating uniform heating of an microwave absorptive target. A microwave housing has a longitudinal axis and propagates a waveguide mode at an operating frequency. The target is located in an axial cross-sectional area relative to the longi... | 08/15/2006 |
| 7034266 | Tunable microwave apparatus Disclosed is a method and apparatus for tuning a microwave apparatus. The chamber volume of the microwave apparatus can be changed by moving a flexible portion of a flexible wall while a perimeter portion of the flexible wall remains fixed. ... | 04/25/2006 |
| 7022954 | Microwave cavity resonator for heating printing substance and/or toner Heating a printing substance and/or toner, in an electrophotographic printer, with a standing microwave formed by at least one cavity resonator, with the printed matter being caused to move through the resonator gap. The power distribution of the microwave applied b... | 04/04/2006 |
| 6994330 | Process for high shear gas-liquid reactions A reactor produces a gas-in-liquid emulsion for providing increased interfacial contact area between the liquid and the gas for improved reaction of the gas with the liquid, or more rapid solution or reaction of a difficulty to dissolve or immiscible gas in or with ... | 02/07/2006 |
| 6960747 | Microwave applicator system A microwave applicator for heating loads being a waveguide transition between the rectangular TE10 and TE20 modes comprising a TE10 mode section and a TE20 mode section. The location of the load being inside said TE20... | 11/01/2005 |
| 6938687 | Apparatus for transfer of heat energy between a body surface and heat transfer fluid In apparatus for heat exchange to and from a body surface using a heat transfer liquid a heat exchanger comprises a plurality of elements within a casing connected axially against one another with spacer tube elements. Each element has its periphery spaced from the ... | 09/06/2005 |
| 6933482 | Microwave heating apparatus Microwave heating apparatus comprising an elongated dielectric microwave applicator with an axial TM type mode, said dielectric applicator is provided with a load chamber for a load to be heated, said load chamber is located in a centered axial position inside the a... | 08/23/2005 |
| 6906297 | Method and device for microwave-heating prepared meals sealed in trays Trays placed in an autoclave are coupled with microwaves from microwave generators and move back and forth as they are processed to ensure even heating. The generators are placed at the side of the autoclave so each generator connects to a wave guide in the autoclav... | 06/14/2005 |
| 6888114 | Microwave heating method In order to reduce reflected waves and improve heating matching, a microwave heating apparatus is equipped with at least one cone-shaped, bell-shaped, pyramid-shaped or similarly shaped waveguide, a reflector apparatus provided inside the waveguide, and a reflection... | 05/03/2005 |
| 6884979 | Method and apparatus for uniform heating in a microwave oven A microwave oven and a method for heating a load which is placed therein. According to the invention a predetermined mode in the cavity of a microwave oven is fed by means of an associated feeding port which is arranged to feed essentially the intended mode only, th... | 04/26/2005 |
| 6861632 | Microwave oven A microwave oven includes a motor for a stirrer and a motor mounting unit. The motor is provided at an outer circumferential surface thereof with a first flange having a hole. The motor mounting unit is provided on an outer surface of a wave guide, and includes a se... | 03/01/2005 |
| 6852963 | Wall-mounted type microwave oven A wall-mounted type microwave oven includes an outer cabinet defining an outer appearance thereof, an inner cabinet disposed in the outer cabinet to define a flow path therebetween, a sensor disposed in the flow path to check conditions of air flowing in the flow pa... | 02/08/2005 |
| 6831259 | Apparatus for the heating of pressed stock in the manufacture of boards of material An apparatus for the heating of pressed stock in the manufacture of boards of material or in the manufacture of veneer panels. The apparatus includes a microwave preheating device having rod antennae disposed in series, reflective shields, and a heating cell configu... | 12/14/2004 |
| 6797929 | Cylindrical reactor with an extended focal region An elliptical exposure chamber has an extended focal region. A plurality of cylindrical reactors (25) form the extended focal region. Reducing the size of the opening (58) to each reactor (25) reduces the amount of energy reflected and increases... | 09/28/2004 |
| 6781102 | Microwave feed system for a cooking appliance having a toroidal-shaped waveguide A microwave delivery system for a cooking appliance having a cooking chamber includes a toroidal-shaped waveguide, a magnetron, a tubular feed member interconnecting the magnetron with the toroidal-shaped wave guide and a field flux generator positioned about the tu... | 08/24/2004 |
| 6740858 | Microwave heating applicator for heating a moving fluid A microwave applicator for heating a moving fluid includes a heating chamber having a fluid inlet and a fluid outlet and through which the fluid to be heated flows. The applicator also includes a microwave energy source and a microwave circuit having at least one wa... | 05/25/2004 |
| 6693266 | Microwave heating apparatus and method of heating objects In order to reduce reflected waves and improve heating matching, a microwave heating apparatus is equipped with at least one cone-shaped, bell-shaped, pyramid-shaped or similarly shaped waveguide, a reflector apparatus provided inside the waveguide, and a... | 02/17/2004 |
| 6630653 | Device for adjusting the distribution of microwave energy density in an applicator and use of this device The invention relates to a device for adjusting the distribution of microwave energy density in an applicator which forms a resonator chamber and in which the radiation generated by microwave generators is guided to the applicator wall by waveguides; and ... | 10/07/2003 |
| 6630654 | Microwave heating apparatus Microwave heating apparatus comprising a dielectric microwave applicator provided with a microwave coupling device adapted to feed microwave energy to the applicator. The applicator is provided with a load chamber 8 extending coaxially with regard to the ... | 10/07/2003 |
| 6614010 | Microwave heating apparatus The present invention relates to an apparatus for heating a sample, such as chemical reaction mixtures, whose dielectric properties varies during the heating process. In particular, the present invention relates to a microwave heating apparatus comprising... | 09/02/2003 |
| 6590191 | Method and apparatus for electromagnetic exposure of planar or other materials A source provides an electromagnetic wave that has a range of frequencies. The source sweeps the frequency of the electromagnetic wave between a cutoff frequency and double the cutoff frequency. The location, angle, or effective angle of an opening is adj... | 07/08/2003 |
| 6583395 | Focusing microwave applicator The microwave applicator for microwaves outputs from a guide (1) comprises an envelope (3) that forces microwaves to converge towards a focal point (16) by means of a complementary central reflector (4). A fraction of the waves reaches this point after re... | 06/24/2003 |
| 6469286 | Variable-impedance unit, microwave device using the unit, and microwave heater A compact and highly controllable impedance-varying-unit, a microwave device using the same unit, and a high-frequency-heating appliance using the same unit are provided. The impedance varying unit includes a rectangular waveguide-section as a main body m... | 10/22/2002 |
| 6437303 | Method and furnace for microwave sintering of nuclear fuel A method and a furnace are provided for microwave sintering of nuclear fuel. A stationary wave is generated in an antenna cavity and used to extract microwaves through slots into a resonance chamber containing the nuclear fuel. A position of the slots is ... | 08/20/2002 |
| 6396037 | Dielectric heating device The invention provides a dielectric heating device. The device includes a plurality of electrically conductive side walls which are electrically interconnected in use and arranged in series to define a heating cavity. At least one pair of adjacent side wa... | 05/28/2002 |
| 6396034 | Method and apparatus for electromagnetic exposure of planar or other materials A path for a material passes through an opening and along a segment through an off-peak region of an electric field. An E-plane bend delivers an electromagnetic wave to the segment. A standing wave is used to heat the material. The peaks or valleys are pu... | 05/28/2002 |
| 6365885 | Microwave processing in pure H fields and pure E fields Embodiments include a process including providing a microwave radiation source and a processing chamber. The process includes generating a region of pure magnetic field from the microwave radiation in the processing chamber. A region of pure electric fiel... | 04/02/2002 |
| 6316759 | Microwave heating apparatus for gas chromatographic columns A microwave heating apparatus is used for heating a chromatographic column assembly containing a microwave absorbing material. The microwave heating apparatus includes an antenna transmitting a microwave signal and a resonant cavity containing the chromat... | 11/13/2001 |
| 6274858 | Bends in a compact circularly polarized microwave feed A feed that provides circularly polarized microwave energy such as for energizing a microwave oven cavity. The feed includes a transformer to match a linearly polarized rectangular waveguide to a polarization waveguide section which may be circular or squ... | 08/14/2001 |
| 6259077 | Method and apparatus for electromagnetic exposure of planar or other materials A source provides an electromagnetic wave that has a range of frequencies. The source sweeps the frequency of the electromagnetic wave between a cutoff frequency and double the cutoff frequency. The location, angle, or effective angle of an opening is adj... | 07/10/2001 |
| 6207941 | Method and apparatus for rapid drying of coated materials with close capture of vapors A method and apparatus for the removing solvents from coated materials while capturing evaporated vapors in a confined space and maintaining non-explosive conditions within the space. Microwave energy may be applied to a coated material as the coated mate... | 03/27/2001 |
