Patents by Inventor DAVID LUK

DAVID LUK 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: 20250228751
    Abstract: The present disclosure discloses the application of calcium aluminate in pre-mixed dental filling materials, the pre-mixed dental filling materials themselves, and their preparation methods. In the pre-mixed dental filling materials of the present disclosure, calcium aluminate is used as the primary hydraulic setting material, supplemented by calcium oxide as a curing accelerator and expansion agent, and may also include calcium pyrophosphate. The resulting material is a biologically hydraulic paste with excellent injectability. This material remains fluid under sealed conditions and hardens upon hydration when placed in a physiological environment and exposed to physiological fluids. The disclosure leverages the excellent biocompatibility and bioactivity of calcium aluminate to prepare pre-mixed aluminate hydraulic dental filling materials, which can be used for medical and dental applications, including pulp capping, root canal therapy, and hard tissue repair.
    Type: Application
    Filed: August 21, 2024
    Publication date: July 17, 2025
    Inventors: Lei ZHANG, David LUK, Yu SUN, Tuojiang WU, Yang SONG, Kewang LU, Xiaojun SHI
  • Publication number: 20240315249
    Abstract: The present disclosure discloses a disinfectant and a disinfection method for effectively killing endospores. The disinfectant includes a certain amount of polyhexamethylene biguanide as an active ingredient to kill endospores of Bacillus subtilis var. niger. The disinfectant can effectively kill endospores at room temperature and the atmospheric pressure. The disinfectant can be used for disinfection in environments including hospitals, crowded places, enclosed spaces, public transportation, and livestock and poultry breeding farms.
    Type: Application
    Filed: January 23, 2024
    Publication date: September 26, 2024
    Inventors: Lei ZHANG, Kewang LU, David LUK, Jie WEI, Xiaojun SHI
  • Publication number: 20240156903
    Abstract: The present invention relates to oral composition and the method of preparation and use of such composition for inhibiting, reducing, and/or disrupting oral biofilm. The composition comprises a stabilizing matrix, a cationic biocide, and a peroxide source.
    Type: Application
    Filed: February 13, 2023
    Publication date: May 16, 2024
    Applicants: Kunming Lanchie Dental Hospital, LTD., Kunming Yeshui Bio-Tech, LTD.
    Inventors: Yun Xu, Lei Zhang, Yang Song, Kewang Lu, David Luk
  • Publication number: 20240122844
    Abstract: The present disclosure relates to a carrier for sustained-release of a drug and use thereof. The carrier is used to carry a drug. The carrier is in a gel state, a semi-solid state, or a solid state. The carrier includes a polyol fatty acid ester as a main component and a hydrogenated vegetable oil dissolved in the polyol fatty acid ester. The state of the sustained-release carrier can be adjusted by adjusting the amount of the dissolved hydrogenated vegetable oil.
    Type: Application
    Filed: August 15, 2023
    Publication date: April 18, 2024
    Inventors: Lei ZHANG, Kewang LU, Yu SUN, Tuojiang WU, Xiaojun SHI, Ling ZHU, Jie WEI, Yang SONG, DAVID LUK
  • Patent number: 8599801
    Abstract: A device, system, and method are directed towards determining a start and/or an end time for a spontaneous event. A mobile device user creates a group for the spontaneous event, and sends the members an invite. During the event, members share media content and/or text messages with other members. Based, in part, on a flow of media content and/or text messages between the members, a determination of a start time and/or end time of the spontaneous event is automatically performed. The start time may be based on when the group is created and/or revised when a flow rate of the media content and/or messages exceed a threshold. The end time may be based on the flow rate being less than another threshold. The location of the spontaneous event may also be determined based on a location of the member's mobile devices during the event.
    Type: Grant
    Filed: February 1, 2007
    Date of Patent: December 3, 2013
    Assignee: Yahoo! Inc.
    Inventors: Andrew Baio, Daniel James Wascovich, Edward Ho, Edward Stanley Ott, IV, Gordon David Luk, Jr., Nathanael Joe Hayashi, Jonathan James Trevor, Leonard Lin, Matthew Fukuda, Michael Quoc
  • Publication number: 20110072125
    Abstract: A device, system, and method are directed towards determining a suggested characteristic for an event. At least two events are determined. In one embodiment, at least one characteristic is determined for one of the event. A plurality of other characteristics is determined for the other event. The characteristics of the two events may be determined implicitly from communications during the events or from user input. Based on a relationship between the determined characteristics, the suggested characteristic for the event is then determined. In one embodiment, the relationship is defined as a match of characteristics. The event may then be modified based on the suggested characteristic. For example, a suggested member may be invited to join the event, or the event's time, location, or name may be changed. If the other event is current or pending, the event and the other event may be combined.
    Type: Application
    Filed: November 29, 2010
    Publication date: March 24, 2011
    Applicant: Yahoo! Inc.
    Inventors: Michael Quoc, Andrew Baio, Daniel James Wascovich, Edward Ho, Edward Stanley Ott, IV, Gordon David Luk, JR., Nathanael Joe Hayashi, Jonathan James Trevor, Leonard Lin, Mathew Fukuda
  • Patent number: 7865206
    Abstract: A device, system, and method are directed towards determining a suggested characteristic for an event. At least two events are determined. In one embodiment, at least one characteristic is determined for one of the event. A plurality of other characteristics is determined for the other event. The characteristics of the two events may be determined implicitly from communications during the events or from user input. Based on a relationship between the determined characteristics, the suggested characteristic for the event is then determined. In one embodiment, the relationship is defined as a match of characteristics. The event may then be modified based on the suggested characteristic. For example, a suggested member may be invited to join the event, or the event's time, location, or name may be changed. If the other event is current or pending, the event and the other event may be combined.
    Type: Grant
    Filed: March 20, 2007
    Date of Patent: January 4, 2011
    Assignee: Yahoo! Inc.
    Inventors: Michael Quoc, Andrew Baio, Daniel James Wascovich, Edward Ho, Edward Stanley Ott, IV, Gordon David Luk, Jr., Nathanael Joe Hayashi, Jonathan James Trevor, Leonard Lin, Matthew Fukuda
  • Publication number: 20080235084
    Abstract: A device, system, and method are directed towards determining a suggested characteristic for an event. At least two events are determined. In one embodiment, at least one characteristic is determined for one of the event. A plurality of other characteristics is determined for the other event. The characteristics of the two events may be determined implicitly from communications during the events or from user input. Based on a relationship between the determined characteristics, the suggested characteristic for the event is then determined. In one embodiment, the relationship is defined as a match of characteristics. The event may then be modified based on the suggested characteristic. For example, a suggested member may be invited to join the event, or the event's time, location, or name may be changed. If the other event is current or pending, the event and the other event may be combined.
    Type: Application
    Filed: March 20, 2007
    Publication date: September 25, 2008
    Applicant: Yahoo! Inc.
    Inventors: Michael Quoc, Andrew Baio, Daniel James Wascovich, Edward Ho, Edward Stanley Ott, Gordon David Luk, Nathanael Joe Hayashi, Jonathan James Trevor, Leonard Lin, Matthew Fukuda
  • Publication number: 20080186926
    Abstract: A device, system, and method are directed towards determining a start and/or an end time for a spontaneous event. A mobile device user creates a group for the spontaneous event, and sends the members an invite. During the event, members share media content and/or text messages with other members. Based, in part, on a flow of media content and/or text messages between the members, a determination of a start time and/or end time of the spontaneous event is automatically performed. The start time may be based on when the group is created and/or revised when a flow rate of the media content and/or messages exceed a threshold. The end time may be based on the flow rate being less than another threshold. The location of the spontaneous event may also be determined based on a location of the member's mobile devices during the event.
    Type: Application
    Filed: February 1, 2007
    Publication date: August 7, 2008
    Applicant: Yahoo! Inc.
    Inventors: Andrew Baio, Daniel James Wascovich, Edward Ho, Edward Stanley Ott, Gordon David Luk, Nathanael Joe Hayashi, Jonathan James Trevor, Leonard Lin, Matthew Fukuda, Michael Quoc