Patents by Inventor Ronald F. Welch

Ronald F. Welch 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 depositing a barrier coating on a polymeric substrate and composition comprising said barrier coating
    Patent number: 6586048
    Abstract: The present invention relates to a method for depositing a parylene polymer barrier coating on a polymeric substrate for improving the chemical resistance of the substrate. The method comprises the steps of thoroughly treating a surface portion of the substrate to remove any contaminants, depositing at least one layer of parylene polymer on the contaminant-free surface portion via chemical vapor deposition, and then annealing each of the at least one layer of parylene polymer for a sufficient time. The present invention also relates to a composition for a barrier coating on a polymeric substrate comprising at least one layer of parylene polymer bonded to the surface of the polymeric substrate. The substrate can be a silicone rubber keypad.
    Type: Grant
    Filed: April 5, 2001
    Date of Patent: July 1, 2003
    Assignee: Honeywell International Inc.
    Inventors: Ronald F. Welch, Jr., Robert J. Saccomanno, Gary A. West
  • Method for depositing a barrier coating on a polymeric substrate and composition comprising said barrier coating
    Publication number: 20020182392
    Abstract: The present invention relates to a method for depositing a parylene polymer barrier coating on a polymeric substrate for improving the chemical resistance of the substrate. The method comprises the steps of thoroughly treating a surface portion of the substrate to remove any contaminants, depositing at least one layer of parylene polymer on the contaminant-free surface portion via chemical vapor deposition, and then annealing each of the at least one layer of parylene polymer for a sufficient time. The present invention also relates to a composition for a barrier coating on a polymeric substrate comprising at least one layer of parylene polymer bonded to the surface of the polymeric substrate. The substrate can be a silicone rubber keypad.
    Type: Application
    Filed: April 5, 2001
    Publication date: December 5, 2002
    Inventors: Ronald F. Welch, Robert J. Saccomanno, Gary A. West
  • Device and method for controlling the temperature of a thin film resistive heater
    Patent number: 6303911
    Abstract: A circuit for controlling the temperature of a thin film conductive heater includes a control circuit for applying a voltage to the heater. The control circuit regulates the temperature of the heater element by using a modeling technique which assumes that the thin film coating functions as a single electrical resistor.
    Type: Grant
    Filed: January 12, 2000
    Date of Patent: October 16, 2001
    Assignee: Honeywell International Inc.
    Inventor: Ronald F. Welch, Jr.
  • Power supply system for a fluorescent lamp
    Patent number: 6097162
    Abstract: A broad range of brightness in a fluorescent lamp may be achieved by applying low-frequency, pulse-width modulated voltage or current to the lamp for a low level of brightness, or high-frequency voltage or current for a high level of brightness. Switching is provided to select between the two signals.
    Type: Grant
    Filed: August 17, 1998
    Date of Patent: August 1, 2000
    Assignee: AlliedSignal Inc.
    Inventors: Ronald F. Welch, Jr., William R. Tombs, Muthu Murugan, Robert Saccomanno