Patents by Inventor Rongguo Zhao

Rongguo Zhao 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).

  • Nonwoven medical fabric
    Patent number: 8137790
    Abstract: A method of manufacturing a nonwoven fabric including at least one nonwoven web material layer having thermoplastic polymer filaments and an initial thickness Ts, wherein the method includes embossing the nonwoven web material layer to form in the layer an embossed portion having a compressed thickness Tc that is less than Ts and an expanded portion of the layer having a thickness Te that is greater than Ts.
    Type: Grant
    Filed: February 21, 2007
    Date of Patent: March 20, 2012
    Assignee: Ahlstrom Corporation
    Inventors: Rahul Dharmadhikary, Rongguo Zhao
  • NONWOVEN MEDICAL FABRIC
    Publication number: 20090169827
    Abstract: A nonwoven fabric including a nonwoven web material layer having thermoplastic polymer filaments and an initial thickness Ts, and a method to make the nonwoven web fabric including embossing the nonwoven web material layer to form an embossed portion of the layer having a compressed thickness Tc that is less than Ts and an expanded portion of the layer having a thickness Te that is greater than Ts.
    Type: Application
    Filed: February 21, 2007
    Publication date: July 2, 2009
    Applicant: AHLSTROM CORPORATION
    Inventors: Rahul Dharmadhikary, Rongguo Zhao
  • Disposable vacuum bags
    Patent number: 7341612
    Abstract: A disposable open bag for a power tool such as a Shop-Vac cleaner has a mounting plate with an opening for receiving debris from the intake of the power tool. The mounting plate is also provided with a vent opening(s), e.g., to prevent the bag from closing in on the air filter and blocking the airflow. The said bag provides a cleaner and more convenient means of collection of the debris, leaves, and particulate matters directly into the bag.
    Type: Grant
    Filed: December 21, 2004
    Date of Patent: March 11, 2008
    Assignee: ZNN Technologies, LLC
    Inventors: Davis Dang Hoang Nhan, Rongguo Zhao, William Hung Nguyen
  • Disposable vacuum bags
    Publication number: 20050132676
    Abstract: A disposable open bag for a power tool such as a Shop-Vac cleaner is disclosed. The bag can comprise a mounting plate with an opening for receiving debris from the intake of the power tool. The mounting plate is also provided with a vent opening(s), e.g., to prevent the bag from closing in on the air filter and blocking the airflow. The said bag provides a cleaner and more convenient means of collection of the debris, leaves, and particulate maters directly into the bag.
    Type: Application
    Filed: December 21, 2004
    Publication date: June 23, 2005
    Inventors: Davis Nhan, Rongguo Zhao, William Nguyen
  • Process for forming micro-fiber cellulosic nonwoven webs from a cellulose solution by melt blown technology and the products made thereby
    Publication number: 20050056956
    Abstract: This invention relates to a process of melt blowing a cellulose solution through a concentric melt blown die with multiple rows of spinning nozzles to form cellulosic microfiber webs with different web structures.
    Type: Application
    Filed: September 16, 2003
    Publication date: March 17, 2005
    Applicant: Biax Fiberfilm Corporation
    Inventors: Rongguo Zhao, Eckhard Schwarz
  • Disposable bag with high air permeability
    Publication number: 20050025397
    Abstract: The disposable bag is comprised of at least one layer of air permeable and flexible thin material at each portion of the said bag. The air permeability of some portions of the bag is in the range of 300 ft3/ft2/min to 1500 ft3/ft2/min. The lawn debris, leaves, and particulate maters are blown into the said disposable bag by a powered machine. The said bag provides a convenient means of effective collection of the debris, leaves, and particulate maters with easy air ventilation.
    Type: Application
    Filed: July 30, 2003
    Publication date: February 3, 2005
    Inventor: Rongguo Zhao