Patents by Inventor Liqun Yu

Liqun 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: 6913784
    Abstract: A process of impregnating fine adsorbent particles such as carbon dust or APS silica gel powder into the micro-cavities of shaped fibers comprises the steps of continuously conveying shaped fibers with micro-cavities to a reservoir of the fine adsorbent particles. The fibers pass through the reservoir to thereby produce relative motion between the fibers and the particles. Additionally, impact forces are created between the shaped fibers and the fine particles to assist in impregnating the particles into the micro-cavities of the fibers. Any excess particles are removed from the fibers outside the reservoir, and subsequently the shaped fibers impregnated with fine adsorbent particles are collected for later use in filter applications such as cigarette filter and air filter applications, for example.
    Type: Grant
    Filed: November 14, 2002
    Date of Patent: July 5, 2005
    Assignee: Philip Morris USA Inc.
    Inventors: Lixin Luke Xue, Kent B. Koller, Qiong Gao, Tim Sherwood, Charles E. Thomas, George R. Scott, Liqun Yu
  • Patent number: 6863074
    Abstract: Cigarette filters, methods for making cigarettes and methods for smoking cigarettes are provided, which involve the use of an unfunctionalized porous polyaromatic resins, which is capable of removing at least some of at least one gas phase constituent from mainstream smoke through sorption. The unfunctionalized porous polyaromatic resin may be a polymerization product of non-polar styrene and divinyl benzene. Various gas phase constituent can be removed from mainstream tobacco smoke, such as dienes, furans, pyrroles, aromatics and ketones, for example. The cigarette filters and cigarettes can provide low resistance-to-draw and/or high total particulate matter delivery. Additionally, the unfunctionalized porous polyaromatic resin may further include flavorant(s).
    Type: Grant
    Filed: August 30, 2002
    Date of Patent: March 8, 2005
    Assignee: Philip Morris USA Inc.
    Inventors: Lixin Xue, Charles Edwin Thomas, Jr., Liqun Yu, Kent B. Koller
  • Publication number: 20040040565
    Abstract: Cigarette filters, methods for making cigarettes and methods for smoking cigarettes are provided, which involve the use of an unfunctionalized porous polyaromatic resins, which is capable of removing at least some of at least one gas phase constituent from mainstream smoke through sorption. The unfunctionalized porous polyaromatic resin may be a polymerization product of non-polar styrene and divinyl benzene. Various gas phase constituent can be removed from mainstream tobacco smoke, such as dienes, furans, pyrroles, aromatics and ketones, for example. The cigarette filters and cigarettes can provide low resistance-to-draw and/or high total particulate matter delivery. Additionally, the unfunctionalized porous polyaromatic resin may further include flavorant(s).
    Type: Application
    Filed: August 30, 2002
    Publication date: March 4, 2004
    Inventors: Lixin Xue, Charles Edwin Thomas, Liqun Yu, Kent B. Koller
  • Publication number: 20030200973
    Abstract: A cigarette filter for removing gas phase constituents from mainstream cigarette smoke as the smoke is drawn through the filter primarily comprises an activated carbon fiber filter section including a bundle of activated carbon fibers. Particulate adsorbent materials such as granules, beads or course powders may be dispersed amongst the activated carbon fibers to aid in removal of the gas phase constituents. Additionally, the activated carbon fiber filter section may be used in combination with a separate bed or beds of particulate adsorbent material. In one embodiment, the activated carbon fibers are positioned within a helical groove on the outside of a threaded rod within the activated carbon fiber filter section. Relatively smaller amounts of activated carbon fibers produce the same smoke constituent reduction as larger amounts of particulate adsorbent material.
    Type: Application
    Filed: April 11, 2003
    Publication date: October 30, 2003
    Inventors: Lixin Xue, Jose G. Nepomuceno, Shuzhong Zhuang, Timothy Scott Sherwood, John Bryant Paine, Jay A. Fournier, Charles Edwin Thomas, Kent Brian Koller, Liqun Yu
  • Publication number: 20030168070
    Abstract: A process of impregnating fine adsorbent particles such as carbon dust or APS silica gel powder into the micro-cavities of shaped fibers comprises the steps of continuously conveying shaped fibers with micro-cavities to a reservoir of the fine adsorbent particles. The fibers pass through the reservoir to thereby produce relative motion between the fibers and the particles. Additionally, impact forces are created between the shaped fibers and the fine particles to assist in impregnating the particles into the micro-cavities of the fibers. Any excess particles are removed from the fibers outside the reservoir, and subsequently the shaped fibers impregnated with fine adsorbent particles are collected for later use in filter applications such as cigarette filter and air filter applications, for example.
    Type: Application
    Filed: November 14, 2002
    Publication date: September 11, 2003
    Inventors: Lixin Luke Xue, Kent B. Koller, Qiong Gao, Tim Sherwood, Charles E. Thomas, George R. Scott, Liqun Yu