Patents by Inventor Subrata Mondal

Subrata Mondal 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).

  • Low Frequency Communication System over Power Lines
    Publication number: 20240039579
    Abstract: An apparatus and method for transmitting information from an emergency power system (EPS) to control devices of remotely connected loads without any additional hardware or wiring. The EPS causes the frequency, phase or magnitude of an AC power signal to be varied according to an established protocol, that is detected by the remote control device, which operates the load in accordance with the protocol.
    Type: Application
    Filed: July 31, 2023
    Publication date: February 1, 2024
    Inventors: Conrad PECILE, Leon HERMANS, Subrata MONDAL
  • Methods for producing di-block polymers
    Patent number: 6989426
    Abstract: The current major way of making nanofibers is electrospinning. However, the minimum fiber diameter is limited to be about 300–500 nm, which is not compliant with the physical definition of nano structures (in the region of 1 to 100 nm). Futher, the productivity is relatively low. This invention provides a method for manufacturing a nano-sized di-block polymer including at least a hard-segment polymer and a soft-segment polymer. First, a sample containing the hard-segment polymer, the soft-segment polymer, and a catalyst is dissolved in a first solvent. Then the dissolved sample is cast on substrate, and then the first solvent to is removed form a dried sample. Finally, the nano-sized di-block polymer is formed by crew-cutting.
    Type: Grant
    Filed: June 12, 2003
    Date of Patent: January 24, 2006
    Assignee: The Hong Kong Polytechnic University
    Inventors: Jinlian Hu, Subrata Mondal
  • Methods for manufacturing polyurethanes
    Publication number: 20050107563
    Abstract: This invention provides water-dispersible polyurethanes made by a difunctional alcohol, a difunctional isocyanate, and a chain extender containing reactive hydrogen groups.
    Type: Application
    Filed: November 19, 2003
    Publication date: May 19, 2005
    Applicant: The Hong Kong Polytechnic University
    Inventors: Jinlian Hu, Zhuohong Yang, Kwok-Wing Yeung, Subrata Mondal
  • Methods for producing di-block polymers
    Publication number: 20040254317
    Abstract: The current major way of making nanofibers is electrospinning. However, the minimum fiber diameter is limited to be about 300-500 nm, which is not compliant with the physical definition of nano structures (in the region of 1 to 100 nm). Futher, the productivity is relatively low. This invention provides a method for manufacturing a nano-sized di-block polymer including at least a hard-segment polymer and a soft-segment polymer. First, a sample containing the hard-segment polymer, the soft-segment polymer, and a catalyst is dissolved in a first solvent. Then the dissolved sample is cast on substrate, and then the first solvent to is removed form a dried sample. Finally, the nano-sized di-block polymer is formed by crew-cutting.
    Type: Application
    Filed: June 12, 2003
    Publication date: December 16, 2004
    Inventors: Jinlian Hu, Subrata Mondal