Patents by Inventor Chunde Liu

Chunde Liu 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).

  • QUICK MENU SELECTION DEVICE AND METHOD
    Publication number: 20220206683
    Abstract: Implementations of the subject matter described herein provide a keyboard and an electronic device. The keyboard comprises a touch-sensitive region configured to send an indication of a position of a touch to the electronic device. The electronic device may display a menu including a plurality of configurable menu items. A shape of the menu matches a shape of the touch-sensitive region, and the menu item corresponding to the touch position may be highlighted, such that the user may acknowledge the touch position without looking at the keyboard. In this case, input efficiency may be improved in case of selecting menu items, since the user does not need to divert its sight from the display to the keyboard or the pointing device.
    Type: Application
    Filed: May 19, 2019
    Publication date: June 30, 2022
    Inventors: Masaaki FUKUMOTO, Paul KOS, Nicolas SCHMITT, Go OSAKI, Kelong ZHAO, Chun Lai ZHANG, Chunde LIU, Hao ZHUANG, Shuling CHEN, Yu YU, Qing FENG
  • Betaine surfactants and preparation methods and uses thereof
    Patent number: 9540559
    Abstract: Betaine surfactants of formula (I) and preparation methods and uses thereof are provided. The surfactant can decrease the interfacial surface tension of crude oil till 10?3 mN/m, have the capabilities of antiheating (130° C.), antimineralizing and antidiluting, and can be used in the field of tertiary oil recovery.
    Type: Grant
    Filed: March 11, 2011
    Date of Patent: January 10, 2017
    Assignee: PETROCHINA COMPANY LIMITED
    Inventors: Chunde Liu, Shiyi Yuan, Demin Wang, Xinmin Song
  • BETAINE SURFACTANTS AND PREPARATION METHODS AND USES THEREOF
    Publication number: 20140113842
    Abstract: Betaine surfactants of formula (I) and preparation methods and uses thereof are provided. The surfactant can decrease the interfacial surface tension of crude oil till 10?3 mN/m, have the capabilities of antiheating (130° C.), antimineralizing and antidiluting, and can be used in the field of tertiary oil recovery.
    Type: Application
    Filed: March 11, 2011
    Publication date: April 24, 2014
    Applicant: PetroChina Company Limited
    Inventors: Chunde Liu, Shiyi Yuan, Demin Wang, Xinmin Song