Patents by Inventor Yunzheng Li

Yunzheng Li 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: 20240085015
    Abstract: A handheld flashlight includes a hollow cylinder having a first end and a second end, and a rechargeable battery therein. The handheld flashlight further includes a lamp head with a light source, a window breaker, a charging port and a discharging port, selectively connected to an external power source or an external load; a connection port, selectively connected to positive and negative terminals of a vehicle battery through external cables; and a management circuit, selectively applying power from the battery to one or more of the light source, the discharging port, and the connection, and selectively charging the battery from the external power source through the charging port; wherein the handheld flashlight is of such compact size and low weight as to be suitable for single-handed portable operation by a user.
    Type: Application
    Filed: November 17, 2023
    Publication date: March 14, 2024
    Applicant: SHENZEN CHIFROG TECHNLOLOGY CO., LTD.
    Inventors: Fang Li, Yunzheng Jiang
  • Patent number: 5654353
    Abstract: The present invention relates to a degradable starch resin composition, a process for preparing the same and the use thereof. Said composition comprises starch, synthetic resin, mixing promoter, plasticizer, degradation accelerator and other additives. Said process comprising: (a) selecting a biodegradation accelerator; (b) preparing modified starch concentrate; (c) extruding the modified starch, EAA and the synthetic resin in a double-screw extruder and pelleting to obtain the degradable starch resin. The composition of the present invention contains a biodegradation accelerator and its starch content can be up to 80%. Having excellent biodegradability and good physico-mechanical property, the composition is particularly suitable to be used to prepare various light or heavy packaging films and agricultural films, etc.
    Type: Grant
    Filed: May 25, 1995
    Date of Patent: August 5, 1997
    Assignee: Beijing Xingchen Modern Control Engineering Institute
    Inventors: Yunzheng Li, Haojun Zhu, Jianguang Sun, Anhua Li