Patents by Inventor Lin Yu

Lin Yu 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).

  • Patent number: 5464754
    Abstract: A non-radioactive, spectrophotometric, microtiter plate assay for human cystolic phospholipase A.sub.2 (cPLA.sub.2) is described. The assay utilizes a novel synthetic thiol-phospholipid analog as a substrate. In one embodiment, the substrate is a phosphatidylcholine derivative with an arachidonoylthioester in the sn-2 position and an alkenyl-ether or alkenyl-ether in the sn-1 position. The alkyl-ether and the alkenyl-ether in the sn-1 position of the substrate ensures that the assay will only measure cPLA.sub.2 activity and will not be complicated by metabolism of the lysophospholipid product by the enzyme's and lysophospholypase activity.
    Type: Grant
    Filed: August 17, 1993
    Date of Patent: November 7, 1995
    Assignee: The Regents of the University of California
    Inventors: Edward A. Dennis, Laure J. Reynolds, Lin Yu
  • Patent number: 5394968
    Abstract: A clutch to be applied between a transmission shaft and a wheel of an electric cart, comprising a bushing for fixing to the shaft and a hub rotatably covered on the bushing, wherein the hub is adapted to have the wheel securely mounted thereto. A collar is mounted on the outer ends of the bushing and the hub to engage the bushing with the hub. The hub and the bushing, which are concentric annuluses, have matching slots on their outer ends, respectively, and the collar is provided with matching collar protrusions for engagement therewith. A stud is cased within the collar and secured to the outer end of the transmission shaft via a screw, which also slidably secures the collar to the shaft via a spring which sits on the shoulder in the inner wall of the collar. The hub can be easily disengaged from the bushing by simply pulling the collar and compressing the spring and rotating the collar so that the protrusions are no longer aligned with the slots and sit on the outer face of the hub and the bushing.
    Type: Grant
    Filed: May 19, 1993
    Date of Patent: March 7, 1995
    Inventor: Lin Yu-Shu
  • Patent number: 4766941
    Abstract: An electrically powered window shade with selectively variable shading characteristics is installable within a window opening for selectively blocking (by absorption or reflection), filtering and/or transmitting light through the window shade into a room for purposes of energy control and/or decoration, etc. This window shade comprises an upper roller assembly, a lower roller assembly, and an elongate flexible web wound on the upper and lower roller assemblies, with the web being longer than the spacing between the upper and lower roller assemblies. Each of the roller assemblies comprises an elongate tubular roller, bearings engageable with the end of the roller for rotatably journaling the ends of the roller with respect to the window. The web is scrolled onto and from the rollers as the latter are rotated about their respective longitudinal axes.
    Type: Grant
    Filed: June 9, 1986
    Date of Patent: August 30, 1988
    Assignee: Sytron Corporation
    Inventors: David J. Sloop, Hsiang-Lin Yu