Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
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| Number | Title | Issue Date |
| 8158027 | Red light fluorescent material and manufacturing method thereof, and white light luminescent device A red light fluorescent material adapted for being excited by a first light to emit a red light is provided. The red light fluorescent material has the chemical formula (1) presented below, A2Eu(MO4)(PO4) (1), ... | 04/17/2012 |
| 8119029 | Phosphate nano phosphor and method of preparing the same Provided is a phosphate nano phosphor with a mean particle diameter of 100 to 3000 nm. Also provided is a method of preparing a nano phosphor, the method comprising: dissolving two or more species of metal precursor compounds in water, and then adjusting the pH to p... | 02/21/2012 |
| 8092714 | Phosphors and lighting apparatus using the same A phosphor has a chemical formula of: Am(Ba1-xEux)nPyOz, wherein A is at least one of the group consisting of Li, Na and K, while 0 | 01/10/2012 |
| 8017039 | Fluorescent body for use in a near-ultraviolet excitation light-emitting element Provided is a fluorescent body for use in a near-ultraviolet excitation light-emitting element, comprising the compound given by formula (1), having part of element M1 and/or M2 therein replaced by an activation element (M3). M1... | 09/13/2011 |
| 8017038 | Green phosphor and plasma display panel including the same A green phosphor, a plasma display panel (PDP) including the same, and a method for making the same. In one example, the green phosphor includes strontium (Sr); aluminum (Al); europium (Eu); and at least one element (M) selected from the group consisting of phosphor... | 09/13/2011 |
| 7670507 | Phosphor composition for a low-pressure discharge lamp with high color temperature A phosphor composition for a low-pressure discharge lamp with a high light yield and a high color temperature contains phosphors which emit in the red wavelength region, including yttrium oxide doped with europium or gadolinium-zinc-magnesium pentaborate doped with ... | 03/02/2010 |
| 7591962 | Low-pressure mercury vapor discharge lamp comprising UV-A phosphor The invention is concerned with a low-pressure mercury vapor discharge lamp comprising a light-transmitting discharge vessel, said discharge vessel enclosing, in a gastight manner, a discharge space provided with a filling of mercury, at least a part of a wall of th... | 09/22/2009 |
| 7497974 | Ce,Pr-coactivated yttrium phosphate phosphor and lamp containing same The sensitivity of YPO4:Ce phosphors to 185 nm radiation may be increased by incorporating a praseodymium coactivator. The use of Ce and Pr as co-activators in a YPO4 phosphor improves the sensitivity of the phosphor to excitation by both 185 n... | 03/03/2009 |
| 7396490 | Ce,Pr-coactivated calcium pyrophosphate phosphor and lamp containing same A UV-emitting, Ce,Pr-coactivated calcium pyrophosphate phosphor is provided wherein the Pr activator increases the phosphor's sensitivity to excitation by 185 nm radiation. The improved sensitivity to the 185 nm radiation allows the phosphor to make better use of th... | 07/08/2008 |
| 7396491 | UV-emitting phosphor and lamp containing same A UV-emitting phosphor and lamp containing same are described. The phosphor is a praseodymium-activated pyrophosphate-based phosphor which may be represented by the general formula (Ca2-x,Srx)P2O7:Pr where 0≦x≦2. The p... | 07/08/2008 |
| 7390436 | Zirconium or hafnium-containing oxides Oxo-acid salts, double oxides or complex oxides contain 0.001-10 atom % of Zr or Hf. They emit near-ultraviolet radiation when excited with vacuum-ultraviolet radiation. ... | 06/24/2008 |
| 7314581 | Rare earth phosphate and making method A rare earth phosphate represented by the formula: RPO4 wherein R is a rare earth element selected from Sc, Y, and lanthanoids of atomic numbers 57 to 71, wherein Mn substitutes for 0.01-15 atom % of R emits blue light when excited by vacuum-UV radiation.... | 01/01/2008 |
| 7309455 | Phosphor composition for lamps The invention relates to a phosphor composition for lamps with a lattice of monoclinic crystal structure (monazite) of type (1−g)[((1−c−a)*Ln, c*Ce, a*A)PO4]×g*GeO2, in which Ln is at least one element selected from the group consisting ... | 12/18/2007 |
| 7255812 | Method of making haloapatite phosphors A method of making a haloapatite phosphor having a general formula represented by (Ca(1−x−y)MnxSby)5(PO4)3(F(1−z−y)ClzOy), where 0 | 08/14/2007 |
| 7247257 | Light emitting device To minimize the variability in the emitted light color and improve the unevenness of color tone, a light emitting device comprises a light emitting element and a fluorescent substance that is excited by the light emitting element, wherein the light emitting element ... | 07/24/2007 |
| 7238302 | Single-component, UV-emitting phosphor The present invention is a single-component, UV-emitting phosphor having a composition represented by the general formula (Y1−x−y−zLaxGdyCeZ)PO4 where x has a value in a range from 0.001 to 0.98, y has a v... | 07/03/2007 |
| 7060202 | Process for preparing rare earth luminescent materials The present invention relates to a process for preparing rare earth trichromatic phosphor, comprising the following steps: (1) providing precursors for at least one composition formula selected from the group consisting of CaBPO5:xEu:yTb, CaAlr... | 06/13/2006 |
| 6979415 | Luminescent nanomaterials powders having predetermined morphology and method of making A method of making a luminescent nanomaterial having a plurality of nanoparticles. The luminescent nanomaterial includes at least one lanthanide group metal phosphate and at least one lanthanide series dopant, wherein each of the plurality of nanoparticles has a pre... | 12/27/2005 |
| 6911160 | Phosphate glass for use in the manufacture of ultra-short length lasers and amplifiers A high-gain phosphate glass composition, which can be used to produce ultra-short gain length lasers and optical amplifiers is described wherein the composition of the glass in addition to exhibiting high gain for lasers and amplifiers, also exhibits high thermal sh... | 06/28/2005 |
| 6702959 | Long life, white light emitting electroluminescent phosphor A long-life, white-emitting phosphor blend is provided which comprises about 75 wt. % of a first electroluminescent phosphor having an x color coordinate of about 0.530 and a y color coordinate of about 0.455; about 10 wt. % of a second electroluminescent... | 03/09/2004 |
| 6695980 | Compressed fluid formulation containing electroluminescent material An imaging composition comprises a mixture of a fluid and a functional material; wherein the fluid is compressed and the functional material is an electroluminescent material which is dissolved, dispersed and/or solubilized in the compressed fluid; and wh... | 02/24/2004 |
| 6692660 | High luminescence phosphor particles and related particle compositions Methods for producing metal/metalloid oxide particles comprise rare earth metals herein include reacting a reactant stream in a gas flow. The reactant stream includes a rare earth metal precursor and an oxygen source. A collection of particles comprising ... | 02/17/2004 |
| 6690119 | Phosphor, method for preparing phosphor layer and vacuum fluorescent display A phosphor without using cadmium having excellent luminous characteristic which emits a light in the visible region. The phosphor is prepared by mixing 1% of B2 O3 powder and 10% of In2 O3 with CaS:Eu, Ce phosph... | 02/10/2004 |
| 6685852 | Phosphor blends for generating white light from near-UV/blue light-emitting devices Phosphor blends are disclosed that are capable of absorbing electromagnetic radiation having wavelengths in the range from about 315 nm to about 480 nm. These blends are mixtures of phosphors selected from the group consisting of Sr2 P2 | 02/03/2004 |
| 6666993 | Single component calcium halophosphate phosphor A single-component calcium halophosphate (ARTIC BRITE) Phosphor and a low pressure discharge lamp utilizing such a phosphor is provided having a lamp envelope having an inner surface, means within the lamp envelope for generating ultraviolet radiation; an... | 12/23/2003 |
| 6666991 | Fluorescent or phosphorescent composition A fluorescent or luminous composition, comprising a multilayered film-coated powder having at least two coating films on a base particle, and a fluorescent or luminous substance; the composition, wherein at least one layer of the coating films contains th... | 12/23/2003 |
| 6660185 | Photoluminescent phosphor powders, methods for making phosphor powders and devices incorporating same Photoluminescent phosphor powders and a method for making phosphor powders. The phosphor powders have a small particle size, narrow particle size distribution and are substantially spherical. The method of the invention advantageously permits the economic... | 12/09/2003 |
| 6656859 | Tellurite glasses and optical components A family of tellurite glasses and optical components for telecommunication systems, the glasses consisting essentially of, as calculated in cation percent, 65-97% TeO2, and at least one additional oxide of an element having a valence greater th... | 12/02/2003 |
| 6627114 | Rare earth oxide type phosphor for vacuum ultraviolet ray excitation, phosphor paste composition and vacuum ultraviolet ray excitation type light-emitting device A phosphor for vacuum ultraviolet ray excitation, which comprises a rare earth oxide type phosphor, wherein at least part of the surface of the rare earth oxide type phosphor is coated with a compound containing at least a magnesium element and a phosphor... | 09/30/2003 |
| 6627113 | Phosphor consisting of hollow particles, phosphor slurry, phosphor beads for analysis using tracer technique and their production processes A phosphor consisting of hollow particles, each hollow particle having an outer shell and a space in the inside of said outer shell.... | 09/30/2003 |
| 6616862 | Yellow light-emitting halophosphate phosphors and light sources incorporating the same Halophosphate luminescent materials co-activated with europium and manganese ions and having the general formula of (Ca,Sr,Ba,Mg)5 (PO4)3 :Eu2+,Mn2+ are disclosed. The inclusion of manganese shifts th... | 09/09/2003 |
| 6602617 | Plasma picture screen with coated phosphor A plasma picture screen with a phosphor preparation comprising a phosphor with a coating which comprises a phosphate MPO4, wherein M is a metal chosen from the group Al, Sc, Y, Lu, Gd, and La. This coating is effective in counteracting the ther... | 08/05/2003 |
| 6589450 | Light-converting material and composition for producing the same The present invention relates to a material comprising a matrix, apatite and at least one europium composite compound of the general formula Mexm My3 Rzn, wherein mx+3y=nz; Mex | 07/08/2003 |
| 6590333 | Rare earth phospho-vanadate phosphors, display system and light emitting system Rare earth phospho-vandate phosphors containing at least one element of Group IV of the periodic table have spherical or cubic shaped particles and provide higher brightness and longer brightness life, and effective for use in display systems and light em... | 07/08/2003 |
| 6572784 | Luminescent pigments and foils with color-shifting properties Interference pigment flakes and foils are provided which have luminescent and color-shifting properties. The pigment flakes can have a symmetrical coating structure on opposing sides of a core layer, can have an asymmetrical coating structure with all of ... | 06/03/2003 |
| 6565770 | Color-shifting pigments and foils with luminescent coatings Interference pigment flakes and foils are provided which have luminescent and color-shifting properties. A luminescent material coating structure is provided which partially covers or encapsulates a color-shifting pigment flake, or covers the outer surfac... | 05/20/2003 |
| 6562260 | Recovery of electroluminescsent phosphor from encapsulated material A method of recovering a base phosphor from encapsulated phosphors, which comprises the steps of selecting a recovery vessel including a magnetic stir bar; adding to the recovery vessel, deionized water, a first batch of concentrated hydrochloric acid and... | 05/13/2003 |
| 6559598 | Plasma picture screen with UV light emitting layer A plasma picture screen, in particular an AC plasma picture screen with a coplanar arrangement having an enhanced luminance. A UV light emitting layer (8) is provided on the front plate (1), which comprises a glass plate (3) on which a dielectric layer (4... | 05/06/2003 |
| 6544437 | Yttrium silicate based phosphor having effective emission at low voltages and method for synthesizing the same A yttrium silicate based phosphor with excellent luminescent efficiency at low voltages for utility in field emission devices (FEDs), and a method for synthesizing the phosphor. The yttrium silicate based phosphor contains Eu, Ce or Tb as an activator, ph... | 04/08/2003 |
| 6538805 | Codopant polymers for efficient optical amplification In accordance with the invention, the present invention provides for a polymer comprised of a general composition. The polymer has a first rare earth element, a second rare earth element, one of the elements of Group VIA, one of the elements of... | 03/25/2003 |
