Patents by Inventor Kai Chi

Kai Chi 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: 12516268
    Abstract: Multi-surfactant systems where two or more surfactant molecules are coupled to control the spatial distribution of polar groups of the combined surfactant molecules are disclosed. The system can be implemented by an aqueous medium including an associate charge constant surfactant and charge variable surfactant. The charge variable surfactant has at least one neutral end group at one pH value of the medium and at least one either an anionic polar group or a cationic polar group at a different pH value of the medium. The charge constant surfactant has at least one, and preferably two or more groups that does not change charge at the one or different pH values of the aqueous medium. The multi-surfactant system can be coupled or connected to the surface of a substrate where the arrangement of the two or more coupled surfactant molecules control the polarity of the substrate surface.
    Type: Grant
    Filed: January 23, 2020
    Date of Patent: January 6, 2026
    Assignee: The Penn State Research Foundation
    Inventors: Jeffrey M. Catchmark, Kai Chi
  • Publication number: 20220298319
    Abstract: An insoluble foam composite material is formed by a mixture combining an anionic polysaccharide, a cationic polysaccharide, a solvent, and a plasticizer. In particular, the composite material can be prepared by heating, freezing and lyophilizing the mixture to produce, for example, insoluble porous foam-like composites.
    Type: Application
    Filed: July 29, 2020
    Publication date: September 22, 2022
    Inventors: Jeffrey M. Catchmark, Ke Liu, Kai Chi, Jingxuan Yang
  • Publication number: 20200157467
    Abstract: Multi-surfactant systems where two or more surfactant molecules are coupled to control the spatial distribution of polar groups of the combined surfactant molecules are disclosed. The system can be implemented by an aqueous medium including an associate charge constant surfactant and charge variable surfactant. The charge variable surfactant has at least one neutral end group at one pH value of the medium and at least one either an anionic polar group or a cationic polar group at a different pH value of the medium. The charge constant surfactant has at least one, and preferably two or more groups that does not change charge at the one or different pH values of the aqueous medium. The multi-surfactant system can be coupled or connected to the surface of a substrate where the arrangement of the two or more coupled surfactant molecules control the polarity of the substrate surface.
    Type: Application
    Filed: January 23, 2020
    Publication date: May 21, 2020
    Applicant: The Penn State Research Foundation
    Inventors: Jeffrey M. Catchmark, Kai Chi
  • Patent number: 10550353
    Abstract: Multi-surfactant systems where two or more surfactant molecules are coupled to control the spatial distribution of polar groups of the combined surfactant molecules are disclosed. The system can be implemented by an aqueous medium including an associate charge constant surfactant and charge variable surfactant. The charge variable surfactant has at least one neutral end group at one pH value of the medium and at least one either an anionic polar group or a cationic polar group at a different pH value of the medium. The charge constant surfactant has at least one, and preferably two or more groups that does not change charge at the one or different pH values of the aqueous medium. The multi-surfactant system can be coupled or connected to the surface of a substrate where the arrangement of the two or more coupled surfactant molecules control the polarity of the substrate surface.
    Type: Grant
    Filed: May 20, 2016
    Date of Patent: February 4, 2020
    Assignee: The Penn State Research Foundation
    Inventors: Jeffrey Catchmark, Kai Chi
  • Publication number: 20180142184
    Abstract: Multi-surfactant systems where two or more surfactant molecules are coupled to control the spatial distribution of polar groups of the combined surfactant molecules are disclosed. The system can be implemented by an aqueous medium including an associate charge constant surfactant and charge variable surfactant. The charge variable surfactant has at least one neutral end group at one pH value of the medium and at least one either an anionic polar group or a cationic polar group at a different pH value of the medium. The charge constant surfactant has at least one, and preferably two or more groups that does not change charge at the one or different pH values of the aqueous medium. The multi-surfactant system can be coupled or connected to the surface of a substrate where the arrangement of the two or more coupled surfactant molecules control the polarity of the substrate surface.
    Type: Application
    Filed: May 20, 2016
    Publication date: May 24, 2018
    Inventors: Jeffrey CATCHMARK, Kai CHI
  • Patent number: 6718526
    Abstract: A system for determining an assigned classification for a set of physical events on a substrate. Sensors sense the physical events on the substrate and produce event data. A plug in rule module manager receives and manages any number of plug in rule modules. Each plug in rule module has an input, a local filter, an analyzer, and an output. The input receives the event data and confidence values from preceding plug in rule modules. The local filter analyzes the received confidence values from the preceding plug in rule modules and selectively by passes the plug in rule module based at least in part upon the received confidence values from the preceding plug in rule modules. The analyzer analyzes the event data in view of a given classification associated with the plug in rule module, and assigns a confidence value based at least in part upon how well the event data fits the given classification. The output provides the confidence value to subsequent plug in rule modules.
    Type: Grant
    Filed: February 7, 2003
    Date of Patent: April 6, 2004
    Assignee: KLA-Tencor Corporation
    Inventors: Peter Eldredge, Patrick Y. Huet, Robinson Piramuthu, Sandeep Bhagwat, Kai Chi, Kai Liu, Martin Plihal, Shaio Roan, Maruti Shanbhag