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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 |
| 5248474 | Large threaded tungsten metal parts and method of making same A method of making a threaded tungsten metal part having a diameter or thickness greater than two inches. Tungsten metal powder is hot isostatically pressed and sintered and then machined to the desired thread configuration using a single point tungsten c... | 09/28/1993 |
| 5244750 | Coated electroluminescent phosphor A coated electroluminescent phosphor which can be copper activated zinc sulfide, copper and manganese activated zinc sulfide or copper activated zinc sulfide-selenide is disclosed having a particle size of from less than about 5 micrometers in diameter to... | 09/14/1993 |
| 5231123 | Basing cement A basing cement comprises, in weight percent, 80 to 85 filler material of limestone and lithopone, and 15 to 20 of binder resins including at least 6 weight percent of araucaria resin.... | 07/27/1993 |
| 5223341 | Phosphor containing barium and lead A phosphor of the type utilized in a fluorescent lamp and which includes core elements barium, lead, silicon, and oxygen where a continuous, conformal outer coating of hydration and solubilization resistant aluminum oxide, which is impermeable to migratio... | 06/29/1993 |
| 5223782 | Method for measuring the fluidity of fluidized beds In a method for detecting the fluidity of particles in a vertically extending bed of fluidized particles, an electric charge which is generated on the particles is dissipated through an electrically conductive means in the fluidized bed to give an indicat... | 06/29/1993 |
| 5207948 | Stir-in fluorescent lamp phosphor and method of making same A stir-in fluorescent lamp phosphor is coated with a 1:1 ratio of latex polymer and fumed silica. The polymer-coated fluorescent lamp phosphor exhibits improved dispersability and wettability in aqueous and organic binder media which are used to apply flu... | 05/04/1993 |
| 5197622 | Vent pressure relief device A device for venting dangerous pressures within a cylindrical battery. Pressure relief is provided by special score lines in a container to give way under a pressure increase prior to the pressure rising to the level that might cause an explosive conditio... | 03/30/1993 |
| 5194332 | Europium-activated barium magnesium silicate phosphor The initial power output and maintenance of a fluorescent lamp containing europium-activated barium magnesium silicate phosphor is significantly improved by combining the phosphor with a flux and subjecting the phosphor/flux mixture to a refiring and rewa... | 03/16/1993 |
| 5185180 | Method of improving the maintenance of a fluorescent lamp containing europium-activated barium magnesium silicate phosphor The initial power output and maintenance of a fluorescent lamp containing europium-activated barium magnesium silicate phosphor is significantly improved by combining the phosphor with a flux and subjecting the phosphor/flux mixture to a refiring and rewa... | 02/09/1993 |
| 5185030 | Method for producing extrafine pure metal powder A method of making extrafine pure elemental metal powder from a highly malleable pure elemental metal powder. The pure elemental metal powder is oxidized, ground to a desired average particle size, reduced in a reducing atmosphere to a pure elemental meta... | 02/09/1993 |
| 5176808 | High current density continuous wire plating cell A wire plating cell comprises an enclosed housing into which plating solution is pumped at a high velocity so as to create substantial fluid pressure therein. The plating cell contains a plurality of consumable anodes through which a wire passes axially a... | 01/05/1993 |
| 5173108 | Method for controlling the oxygen content in agglomerated molybdenum powders A method is disclosed for producing an agglomerated molybdenum plasma spray powder with a controlled level of oxygen which comprises forming a relatively uniform mixture of agglomerated powders containing molybdenum dioxide and one or more ammonium-contai... | 12/22/1992 |
| 5169695 | Bulb formed from bulb forming orifice plate An orifice plate for a glass ribbon machine has an orifice provided with a side wall having a continuously variable angle. When used for making envelopes for incandescent lamps, the plate provides stronger bulbs.... | 12/08/1992 |
| 5162055 | Bulb forming orifice plate for bulb making apparatus An orifice plate for a glass ribbon machine has an orifice provided with a side wall having a continuously variable angle. When used for making envelopes for incandescent lamps, the plate provides stronger bulbs.... | 11/10/1992 |
| 5156560 | Lamp socket An improved lamp socket, and method of fabricating same, including a housing having a cavity into which a plurality of contacts are inserted. The contacts function to mechanically retain the base of a lamp in place and to electrically connect the socket w... | 10/20/1992 |
| 5154852 | Method of making lanthanum cerium terbium gadolinium phosphate phosphor A lanthanum cerium terbium gadolinium phosphate phosphor has the composition La1-x-y-z Cex Tby Gdz PO4, where x=0.2 to 0.45, y=0.127 to 0.137, and z=0.001 to 0.1. The phosphor has improved brightness ... | 10/13/1992 |
| 5154757 | Method of making pure cobalt metal powder substantially free of divalent cationic impurities A method for producing pure cobalt metal powder involves the removal of divalent cationic impurities from a trivalent hexamine cobalt chloride solution. This solution is then decomposed to an insoluble cobalt oxide-containing material, from which pure cob... | 10/13/1992 |
| 5153910 | Protected telephone network interface device A telephone network interface device comprises a base structure, a protector assembly disposed within the base structure and a cover on the base structure. The device also includes a telephone jack and terminals to which a telephone subscriber's wiring ca... | 10/06/1992 |
| 5146199 | Circuit breaker having crimped metal cover An electrical circuit breaker has an insulative rigid base on which a circuit breaker assembly is mounted. The base has two long sides with grooves extending the full lengths thereof. A metal cover is crimped onto the base at and along the full lengths of... | 09/08/1992 |
| 5145512 | Tungsten nickel iron alloys A consolidated tungsten alloy body consisting essentially of from about 88% to about 98% by weight of tungsten, balance, nickel and iron, produced by liquid phase sintering, containing a continuous phase of a tungsten, nickel and iron alloy and a disconti... | 09/08/1992 |
| 5145391 | Switching connector assembly A connector assembly includes first and second housing having a normally open switch fixed between them. Means are formed on one of the housing for maintaining the switch in an open position. In the event of separation of the housings, spring action cause... | 09/08/1992 |
| 5137665 | Process for densification of titanium diboride In a process for producing a high density article of titanium diboride, a titanium diboride powder mixture is formed into a compact shape, and then sintered according to a two step sintering process with one step being at a low furnace pressure to close t... | 08/11/1992 |
| 5137477 | Antenna connector A male connector body for a radio antenna employs a plurality of compressible ribs to provide tactile feedback to an assembler. The ribs provide an insertion force that is less than a withdrawal force.... | 08/11/1992 |
| 5134684 | Electric air or gas heater utilizing a plurality or serpentine heating elements An electric air or gas heater includes a plurality of equal diameter elongated linear serpentine resistive wire heating elements circularly arranged in parallel about a common axis and disposed within a cylindrical chamber having separable air or gas entr... | 07/28/1992 |
| 5132042 | Method of making lanthanum cerium terbium phosphate phosphor with improved brightness A method of making a lanthanum cerium terbium phosphate phosphor involves the single-step reaction of single-phase, mixed valence state lanthanum cerium terbium oxide with boron phosphate in the presence of a flux-forming compound containing lithium. The ... | 07/21/1992 |
| 5126104 | Method of making powder for thermal spray application A method is disclosed for preparing an intimate mixture of powders of nickel-chromium-boron-silicon alloy, molybdenum metal powder, and Cr3 C2 /NiCr alloy suitable for thermal spray coatings which comprises milling a starting mixture... | 06/30/1992 |
| 5124091 | Process for producing fine powders by hot substrate microatomization A process for producing fine powder, which includes entraining a starting powder material in a carrier gas, injecting the starting powder material using the carrier gas into a high temperature jet to form a high velocity stream of molten droplets, fragmen... | 06/23/1992 |
| 5121026 | Electrode for ignition plug The center electrode of an ignition plug is a unitary cylindrical tungsten rod in which the outer peripheral portion thereof has a higher work function than the core portion.... | 06/09/1992 |
| 5120447 | Method for removing heavy metals from wastewater A method for treating wastewater having a pH of between about 0.1 and 14 and containing dissolved heavy metals, in which a substantial portion of the heavy metals is precipitated as crystallized solids embedded within an insoluble monoclinic calcium sulfa... | 06/09/1992 |
| 5120250 | Electrode for ignition plug The center electrode of an ignition plug is a unitary cylindrical tungsten rod in which the outer peripheral portion thereof has a higher work function than the core portion.... | 06/09/1992 |
| 5116532 | Method of making lanthanum cerium terbium phosphate phosphor A method of making a lanthanum cerium terbium phosphate phosphor involves the single-step reaction of a single-phase, mixed valence state lanthanum cerium terbium oxide and boron phosphate. Alternatively, the single-step reaction may involve a mixture of ... | 05/26/1992 |
| 5116266 | Electrical connector An electrical connector wherein the contacts are formed as a quadrangular tube having inwardly projecting beams formed in two opposed walls.... | 05/26/1992 |
| 5115299 | Hermetically sealed chip carrier with ultra violet transparent cover A hermetically sealed chip carrier including a lead frame for use with an EEPROM chip, the carrier including a pre-molded plastic beam and an ultra violet transparent cover.... | 05/19/1992 |
| 5114471 | Hydrometallurgical process for producing finely divided spherical maraging steel powders A process comprising by producing maraging steel powder comprises forming an aqueous solution of iron, cobalt, nickel and molybdenum metals values in a predetermined ratio, forming a reducible solid material from the solution reducing the solid material t... | 05/19/1992 |
| 5112524 | Unactivated yttrium tantalate phosphor An unactivated yttrium tantalate phosphor, M'YTaO4, contains one or more additives of Sr, Rb and Al in order to improve brightness under X-radiation.... | 05/12/1992 |
| 5110499 | Method for increasing the brightness and halflife of electroluminescent phosphors A method for increasing the brightness and halflife of an electroluminescent phosphor by increasing the average particle size of the phosphor to greater than 25 micrometers in diameter.... | 05/05/1992 |
| 5111527 | Electric heater with thermistor temperature control A forced gas electric heater has a serpentine heating element in series with a preheat coil. Gas to be heated first flows through the preheat coil before flowing through the serpentine heating element. A thermistor is disposed between two adjacent turns o... | 05/05/1992 |
| 5106532 | Method of making lanthanum cerium terbium phosphate phosphor A method of making a lanthanum cerium terbium phosphate phosphor involves the single-step reaction of lanthanum cerium terbium oxalate and boron phosphate.... | 04/21/1992 |
| 5102347 | Insulation displacement terminal for telecommunication devices An insulation displacement terminal comprises a clamp having an internally threaded tubular portion to accommodate a screw. An insulated telephone wire can be inserted into an aperture in the clamp. When the screw is screwed all the way into the clamp, a ... | 04/07/1992 |
| 5102454 | Hydrometallurgical process for producing irregular shaped powders with readily oxidizable alloying elements Composite powders containing a first group of metals of iron, cobalt, nickel and molybdenum in specific ratios and one or more oxidizable metals can be formed by forming an aqueous solution containing first group of metals, forming solid material of the m... | 04/07/1992 |
