Patents by Inventor Ashraf Mahtab

Ashraf Mahtab 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).

  • Multi-purpose anchor bolt assembly
    Patent number: 6457909
    Abstract: A multi-purpose anchor bolt, which performs two principle functions: (1) it acts as an active reinforcement for the ground when it is installed and tensioned, and (2) it is used to excavate and advance the face in steps. The invention also includes the method of the multi-purpose anchor bolt's use. This invention is a hybrid of traditional and mechanized excavation techniques.
    Type: Grant
    Filed: December 22, 2000
    Date of Patent: October 1, 2002
    Inventors: Shulin Xu, Ashraf Mahtab
  • Multi-purpose anchor bolt assembly
    Publication number: 20020081159
    Abstract: A multi-purpose anchor bolt, which performs two principle functions: (1) it acts as an active reinforcement for the ground when it is installed and tensioned, and (2) it is used to excavate and advance the face in steps. The invention also includes the method of the multi-purpose anchor bolt's use. This invention is a hybrid of traditional and mechanized excavation techniques.
    Type: Application
    Filed: December 22, 2000
    Publication date: June 27, 2002
    Inventors: Shulin Xu, Ashraf Mahtab