Patents by Inventor Keigo Iwase

Keigo Iwase has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Fluorescent lamp and lighting instrument with unsaturated mercury vapor that achieves high brightness and high temperatures
    Patent number: 8324795
    Abstract: A fluorescent lamp may include a pair of hot cathode electrodes at both its ends, wherein a phosphor is formed in a laminated manner on the inner surface of a glass tube and a protection film is formed between the glass tube and the phosphor, wherein a residual impure gas in the lamp, including the amount occluded by the phosphor and the protection film, is set to 0.5% or less with the sealed rare gas partial pressure ratio, and wherein the following relationship is fulfilled: GHg=A×CL, A=0.0032-0.163 [mg/cc], wherein the amount of sealed mercury is GHg [mg], the lamp internal volume is CL [cc], and the coefficient is A [mg/cc].
    Type: Grant
    Filed: December 25, 2009
    Date of Patent: December 4, 2012
    Assignee: Osram AG
    Inventors: Keigo Iwase, Yukio Matsuda, Takashi Osawa, Takehiko Sakurai
  • Fluorescent Lamp and Lighting Instrument
    Publication number: 20110304257
    Abstract: A fluorescent lamp may include a pair of hot cathode electrodes at both its ends, wherein a phosphor is formed in a laminated manner on the inner surface of a glass tube and a protection film is formed between the glass tube and the phosphor, wherein a residual impure gas in the lamp, including the amount occluded by the phosphor and the protection film, is set to 0.5% or less with the sealed rare gas partial pressure ratio, and wherein the following relationship is fulfilled: GHg=A×CL, A=0.0032-0.163 [mg/cc], wherein the amount of sealed mercury is GHg [mg], the lamp internal volume is CL [cc], and the coefficient is A [mg/cc].
    Type: Application
    Filed: December 25, 2009
    Publication date: December 15, 2011
    Applicant: OSRAM GESELLSCHAFT MIT BESCHRAENKTER HAFTUNG
    Inventors: Keigo Iwase, Yukio Matsuda, Takashi Osawa, Takehiko Sakurai