Patents by Inventor Yu-Kun Ma

Yu-Kun Ma 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).

  • Publication number: 20140120190
    Abstract: Methods of preparing an extract of Prickly-ash peel, including pulverizing the peels of Chinese Prickly-ash berries to produce powdered Prickly-ash peel; extracting the powdered Prickly-ash peel using an organic solvent to yield an organic extract solution; and removing the organic solvent under reduced pressure to yield a residue that is an extract of Prickly-ash peel. The resulting Prickly-ash peel extracts include the active anti-aging ingredient gx-50, having the formula which may be dispersed in a liquid or semi-solid physiologically and cosmetically acceptable vehicles or carriers to form topical anti-aging cosmetics.
    Type: Application
    Filed: October 21, 2013
    Publication date: May 1, 2014
    Inventors: Dong-Qing WEI, Yu-Kun MA, Zhong-Dong QIAO
  • Patent number: 6674228
    Abstract: An inline electron gun for use in a multi-beam electron gun as in a color cathode ray tube (CRT) includes a main focus lens for focusing the electron beams on the CRT's display screen for providing a video image. The main focus lens includes plural charged grids aligned in a spaced manner along the electron gun's longitudinal axis through which plural (typically three) electron beams are directed. One or more of these charged grids includes at least two aligned common apertures for passing the three electron beams. The layered common aperture arrangement allows for increasing the length of the electron gun as well as the effective diameter of the electron gun's main focus lens for improved video image resolution without introducing electron beam astigmatism.
    Type: Grant
    Filed: April 4, 2002
    Date of Patent: January 6, 2004
    Assignee: Chunghwa Pictures Tubes, Ltd.
    Inventors: Hsing-Yao Chen, Yu-Kun Ma, Hsiang-Lin Chang, Chun-Hsien Yeh
  • Publication number: 20030189398
    Abstract: An inline electron gun for use in a multi-beam electron gun as in a color cathode ray tube (CRT) includes a main focus lens for focusing the electron beams on the CRT's display screen for providing a video image. The main focus lens includes plural charged grids aligned in a spaced manner along the electron gun's longitudinal axis through which plural (typically three) electron beams are directed. One or more of these charged grids includes at least two aligned common apertures for passing the three electron beams. The layered common aperture arrangement allows for increasing the length of the electron gun as well as the effective diameter of the electron gun's main focus lens for improved video image resolution without introducing electron beam astigmatism.
    Type: Application
    Filed: April 4, 2002
    Publication date: October 9, 2003
    Inventors: Hsing-Yao Chen, Yu-Kun Ma, Hsiang-Lin Chang, Chun-Hsien Yeh
  • Patent number: 6153970
    Abstract: In a multi-stage, multi-beam electron gun of the common lens type for use in a color cathode ray tube (CRT), a charged grid in the prefocus lens of the electron gun is provided with three inline asymmetric beam passing apertures. The three asymmetric apertures may be either in the G4 grid, in the upper side of the G3 grid, or on the lower side of the G5 grid, i.e., in facing relation to the G4 grid, or may be incorporated in both the G3 and G5 grids. The small G3-G4 and G4-G5 spacing gives rise to isolation of the electron optic lenses of the two outer electron beams from that of the center electron beam allowing the asymmetric auxiliary apertures to asymmetrically and independently correct for electron beam astigmatism, i.e., the difference between the beam's horizontal and vertical focus voltage, and differences in the focus voltages of the two outer electron beams relative to the center electron beam.
    Type: Grant
    Filed: April 20, 1998
    Date of Patent: November 28, 2000
    Assignee: Chunghwa Picture Tubes, Ltd.
    Inventors: Hsing-Yao Chen, Yu Kun Ma