Patents by Inventor Bikash Chandra Chakraborty

Bikash Chandra Chakraborty 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).

  • Lightweight structural composite for load bearing applications
    Patent number: 8361590
    Abstract: The present invention relates to a lightweight structural composite, which comprises an inner core of lightweight panel encapsulated by outer layers of polymer material. Specifically, the lightweight panel consists of multiple laminations of corrugated thin metal or fiber reinforced plastic sheets kept in position by polymeric foam and/or adhesive, and enclosed in a casing of the same material. The outer layer is made up of a blend of thermosetting and thermoplastic polymers. The method of forming the composite comprises of stacking the corrugated sheets, filling the interstitial spaces with the foam, constructing the casing, the surface treatment of the panel for good adhesion to the outer polymer layer and the high temperature/pressure encapsulation of the panel with the polymer blend containing curing agents. The composite has application as replacement to wood, concrete or particle board panels used in ship docking, panels for wall, door and windows, blast-proof panels, rail sleepers and shipping pallets.
    Type: Grant
    Filed: June 23, 2005
    Date of Patent: January 29, 2013
    Assignee: Defence Research & Development Organization
    Inventors: Bikash Chandra Chakraborty, Manoj Nalanda Rajagopalan, Senthil Kumar Kandhaswamy Srinivasan, Ram Sahay Pandey, Praveen Sreenivasan, Uttam Gopal Suryavanshi, Rohidas Dasharath Raut, Arun Kumar Shah
  • Lightweight Structural Composite for Load Bearing Application
    Publication number: 20090123687
    Abstract: The present invention relates to a lightweight structural composite, which comprises an inner core of lightweight panel encapsulated by outer layers of polymer material. Specifically, the lightweight panel consists of multiple laminations of corrugated thin metal or fibre reinforced plastic sheets kept in position by polymeric foam and/or adhesive, and enclosed in a casing of the same material. The outer layer is made up of a blend of thermosetting and thermoplastic polymers. The method of forming the composite comprises of stacking the corrugated sheets, filling the interstitial spaces with the foam, constructing the casing, the surface treatment of the panel for good adhesion to the outer polymer layer and the high temperature/pressure encapsulation of the panel with the polymer blend containing curing agents. The composite has application as replacement to wood, concrete or particle board panels used in ship docking, panels for wall, door and windows, blast-proof panels, rail sleepers and shipping pallets.
    Type: Application
    Filed: June 23, 2005
    Publication date: May 14, 2009
    Inventors: Bikash Chandra Chakraborty, Manoj Nalanda Rajagopalan, Senthil Kumar Kandhaswamy Srinivasan, Ram Sahay Pandey, Praveen Sreenivasan, Uttam Gopal Suryavanshi, Rohidas Dasharath Raut, Arun Kumar Shah