Patents by Inventor Krishnendu Kar

Krishnendu Kar 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).

  • Ultra accurate gas injection system
    Patent number: 6405745
    Abstract: An ultra accurate gas injection system includes an input device for inputting setpoint data including a target flow rate for the flow of gas into the system. The gas flows through a mass flow controller at an actual flow rate. The mass flow controller issues a flow rate signal indicative of at least the actual flow rate and receives a flow control signal. The mass flow controller is configured to control the actual flow rate dependent at least in part upon the flow control signal. A programmable controller is electrically connected to the input device and the mass flow controller. The programmable controller receives the setpoint data from the input device and issues the flow control signal, the flow control signal being dependent at least in part upon the target flow rate contained within the setpoint data. The programmable controller repeatedly reads the flow rate signal and compares the actual flow rate with the target flow rate.
    Type: Grant
    Filed: March 22, 2000
    Date of Patent: June 18, 2002
    Assignee: Delphi Technologies, Inc.
    Inventors: Krishnendu Kar, Robert Semidey