Patents by Inventor Harpreet Singh Grewal

Harpreet Singh Grewal 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).

  • Method for modifying surface grain structure of the material and apparatus thereof
    Patent number: 11549157
    Abstract: The present invention provides a simple, cost effective and hassle-free method and apparatus for modifying the surface grain structure of the material, thereby providing a material with multi-modal grain structure having high strength and good formability. The present invention uses a single step processing technique known as submerged static friction stir processing for modifying the surface grain structure of the material, thereby generating a multi-modal grain structure. In the present invention since the working material is completely immersed in the coolant, this maintains the working temperature of the system. Further the present invention does not involve long processing steps and do not need any specialized equipments.
    Type: Grant
    Filed: January 4, 2018
    Date of Patent: January 10, 2023
    Assignee: Shiv Nadar University
    Inventors: Harpreet Singh, Harpreet Singh Grewal, Jaskaran Singh Saini, Karthikeyan Selvam
  • A METHOD FOR MODIFYING SURFACE GRAIN STRUCTURE OF THE MATERIAL AND APPARATUS THEREOF
    Publication number: 20200140967
    Abstract: The present invention provides a simple, cost effective and hassle-free method and apparatus for modifying the surface grain structure of the material, thereby providing a material with multi-modal grain structure having high strength and good formability. The present invention uses a single step processing technique known as submerged static friction stir processing for modifying the surface grain structure of the material, thereby generating a multi-modal grain structure. In the present invention since the working material is completely immersed in the coolant, this maintains the working temperature of the system. Further the present invention does not involve long processing steps and do not need any specialized equipments.
    Type: Application
    Filed: January 4, 2018
    Publication date: May 7, 2020
    Inventors: Harpreet SINGH, Harpreet Singh Grewal, Jaskaran Singh SAINI, Karthikeyan SELVAM
  • AN APPARTUS AND A METHOD FOR PROCESSING STAINLESS STEEL AND AN IMPROVED STAINLESS STEEL FOR BIOIMPLANTS THEREOF
    Publication number: 20200140970
    Abstract: The present invention provides a simple, single step and time efficient method and apparatus for developing ultrafine grained microstructure stainless steel having enhanced wear resistance, corrosion resistance, biocompatibility, cellular response and hem-compatibility for bio-implant applications. The processed stainless steel showed 50% reduction in corrosion, high resistance against localised pitting and 50% reduction in wear in simulated body fluid. In addition, the processed steel demonstrated better cell viability, significantly lower platelet adhesion and plasma adsorption signifying high thrombo-resistance and thereby making it highly desirable for bio-implant applications. The present invention eliminates the long processing steps and do not need any specialized equipments and also eliminates the post process treatments.
    Type: Application
    Filed: January 4, 2018
    Publication date: May 7, 2020
    Inventors: Harpreet SINGH, Harpreet Singh GREWAL, Soumya PATI, Shailja SINGH, Gopinath PERUMAL