# US 9,437,615 B2 · High intensity discharge lamps with dosing aid > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,437,615 B2 - Document ID: US9437615B2 - Status: Granted - Kind: B2 - Application number: 14/296,166 - Filed: 2014-06-04 - Published: 2015-12-10 - Granted: 2016-09-06 - Earliest claimed: 2014-06-04 - Assignees: General Electric Company - Applicants: General Electric Company - Inventors: Agoston Boroczki; Peter Horvath; Istvan Kerenyi; Sandor Sebok; Anna Inczedy - Web page: https://patentgrep.com/patent/US9437615B2 ## CPC - H10D 86/40: characterised by multiple TFTs - C04B 35/117: Composites - H01J 9/26: Sealing together parts of vessels - H01J 61/125: {having an halogenide as principal component} - H01J 61/26: Means for absorbing or adsorbing gas, e.g. by gettering; Means for preventing blackening of the envelope - H01J 61/28: Means for producing, introducing, or replenishing gas or vapour during operation of the lamp - H01J 61/302: {characterised by the material of the vessel} - H01J 61/827: {Metal halide arc lamps} - H10D 86/60: wherein the TFTs are in active matrices - C04B 2235/3256: Molybdenum oxides, molybdates or oxide forming salts thereof, e.g. cadmium molybdate - C04B 2235/40: Metallic constituents or additives not added as binding phase - C04B 2235/94: Products characterised by their shape - H10D: INORGANIC ELECTRIC SEMICONDUCTOR DEVICES - C04B: LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE {(roofing granules E04D7/005)}; CERAMICS (devitrified glass-ceramics C03C10/00); REFRACTORIES; TREATMENT OF NATURAL STONE - H01J: ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS (spark-gaps H01T; electric arc lamps H05B31/00; particle accelerators H05H) ## Abstract A ceramic metal halide lamp according to various embodiments can include a discharge vessel and an ionizable fill. The ionizable fill is sealed within the discharge vessel. The ionizable fill includes an oxygen dispenser to introduce oxygen in a form of a pellet into the discharge vessel in a controlled manner to facilitate a tungsten halogen wall cleaning cycle. The pellet comprises aluminum-oxide and molybdenum-oxide. ## Claims ### Claim 1 A ceramic metal halide lamp, comprising: a discharge vessel; and an ionizable fill sealed within the discharge vessel, the ionizable fill comprising: an oxygen dispenser to introduce oxygen in a form of a pellet into the discharge vessel in a controlled manner to facilitate a tungsten halogen wall cleaning cycle; and the pellet comprises aluminum-oxide and molybdenum-oxide. ### Claim 2 (depends on 1) The lamp of claim 1, wherein the oxygen dispenser is controlled to accurately dose a concentration of the oxygen into the discharge vessel. ### Claim 3 (depends on 1) The lamp of claim 1, wherein the molybdenum-oxide is molybdenum-trioxide (MoO3). ### Claim 4 (depends on 1) The lamp of claim 1, wherein the pellet comprises a spongy structure. ### Claim 5 (depends on 1) The lamp of claim 1, wherein the pellet comprises a spongy aluminum-oxide structure defining a plurality of interstitial voids containing a dosing component, which comprises the molybdenum-oxide. ### Claim 6 (depends on 1) The lamp of claim 1, wherein the pellet has a spheroidal configuration. ### Claim 7 (depends on 1) The lamp of claim 1, wherein the pellet has a solid aluminum-oxide sphere configuration containing a dose component deposited on an external surface of the pellet and the dose component comprises the molybdenum-oxide. ### Claim 8 (depends on 1) The lamp of claim 1, wherein the pellet further comprises an excess metal for gettering unwanted impurities in the discharge vessel. ### Claim 9 (depends on 1) The lamp of claim 1, wherein the pellet is selected to have a diameter smaller than a diameter of a dosing tube connected to the discharge vessel. ### Claim 10 A method of forming a ceramic halide lamp, comprising: providing a discharge vessel; and sealing an ionizable fill within the discharge vessel, the ionizable fill comprising: an oxygen dispenser to introduce oxygen in a form of a pellet into the discharge vessel in a controlled manner to facilitate a tungsten halogen wall cleaning cycle; and the pellet comprises aluminum-oxide and molybdenum-oxide. ### Claim 11 (depends on 10) A method of claim 10, further comprising preparing the pellet using a pellet preparation process comprising the steps of: mixing aluminum-oxide and molybdenum-oxide with a binder to form a mixture; pressing the mixture to form a pellet; heat treating the pellet to remove the binder from the pellet; and grinding the pellet to form the pellet having a spheroidal shape. ### Claim 12 (depends on 10) The method of claim 10, further comprising controlling the oxygen dispenser to accurately dose a concentration of the oxygen into the discharge vessel. ### Claim 13 (depends on 10) The method of claim 10, wherein the molybdenum-oxide is molybdenum-trioxide (MoO3). ### Claim 14 (depends on 10) The method of claim 10, wherein the pellet has a spongy structure. ### Claim 15 (depends on 10) The method of claim 10, wherein the pellet has a spongy aluminum-oxide structure defining a plurality of interstitial voids containing a dosing component, which comprises the molybdenum-oxide. ### Claim 16 (depends on 10) The method of claim 10, wherein the pellet has a spheroidal configuration. ### Claim 17 (depends on 10) The method of claim 10, wherein the pellet is formed having a solid aluminum-oxide sphere configuration containing a dose component deposited on an external surface of the pellet and the dose component comprises the molybdenum-oxide. ### Claim 18 (depends on 10) The method of claim 10, further comprising selecting the pellet having a diameter smaller than a diameter of a dosing tube connected to the discharge vessel. ### Claim 19 A method of preparing a dosing pellet, comprising: mixing aluminum-oxide and molybdenum-oxide with a binder to form a mixture; pressing the mixture to form a pellet; heat treating the pellet to remove the binder from the pellet; and grinding the pellet to form the pellet having a spheroidal shape.