Patents by Inventor Jeffrey A. Stewart

Jeffrey A. Stewart 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).

  • Patent number: 5887386
    Abstract: Movable louvered window shutters embody a construction and a process for their fabrication that results in a shutter having a high quality, functionally and aesthetically. The shutters use a hardware arrangement including two types of louver pins, a compression spring and a tensioning mechanism to adjust the frictional drag on the shutters. The hardware facilitates a procedure in which the frame and louvers of the shutter are fabricated and finished separately and then assembled. The same kit of hardware can be used to make virtually any size window shutter having movable louvers. The tensioning mechanism includes a threaded insert that enables adjustment of the frictional drag on the louvers without causing deterioration or damage to the shutter frame.
    Type: Grant
    Filed: April 28, 1998
    Date of Patent: March 30, 1999
    Assignee: Timeless Shutters Incorporated
    Inventors: Zachary C. Alexanian, Jeffrey A. Stewart
  • Patent number: 5641358
    Abstract: A tank-like deposition chamber for use in depositing vapors on desired substrates. The deposition chamber has top and bottom ends, and includes a floor which defines the bottom end thereof. In addition to the floor, the deposition chamber includes a vertical sidewall having an inner surface and an upper edge, and at least one wall extension member which is releasably attached to the upper edge of the sidewall and has an upper rim which defines the top end of the deposition chamber. The wall extension member, sidewall and floor define an interior compartment. Attached to the sidewall and communicating with the interior compartment is a vapor inlet port and a first vapor outlet port. Additionally, attached to the wall extension member and communicating with the interior compartment is a second vapor outlet port. The wall extension member increases the storage capacity of the deposition chamber when attached to the upper edge of the sidewall.
    Type: Grant
    Filed: October 10, 1995
    Date of Patent: June 24, 1997
    Inventor: Jeffrey Stewart
  • Patent number: 5488833
    Abstract: A cold trap for condensing and polymerizing residual vapor. The cold trap comprises a containment vessel which comprises a vertical sidewall defining a cylindrical inner surface of substantially constant diameter. Fluidly connected to the sidewall is a vapor inlet line which enters the containment vessel tangentially at a point near the top end thereof such that the vapor entering the containment vessel through the vapor inlet line will impinge against the inner surface of the sidewall and flow in a generally rotational pattern within the containment vessel. The cold trap further comprises a cooling member which is positioned within the containment vessel for facilitating the condensation and polymerization of the vapor.
    Type: Grant
    Filed: September 26, 1994
    Date of Patent: February 6, 1996
    Inventor: Jeffrey Stewart
  • Patent number: 5268033
    Abstract: Disclosed is a table top parylene deposition system wherein reactive monomer vapor enters a deposition chamber tangentially so as to create a rotational flow of vapor within the interior of the chamber. A substrate support fixture is positioned within the chamber and rotated in a direction counter to the rotational flow of vapor.
    Type: Grant
    Filed: July 1, 1991
    Date of Patent: December 7, 1993
    Inventor: Jeffrey Stewart
  • Patent number: 5197498
    Abstract: Apparatus and methods to hold and manipulate dental floss for the removal of plaque and food particles from teeth surfaces. The invention comprises: an elongated handle which may house, contain, and dispense a supply of dental floss; a stationary tong which does not generally move with respect to the handle; a pivotal tong which can be pivoted about a pivot point; means for securing the pivotal tong to the handle to selectively adjust the distance between terminal ends of the stationary tong and the pivotal tong; and means for anchoring the dental floss to the terminal ends of the stationary and pivotal tongs, the dental floss being positioned to span the distance and be pulled taut between the terminal ends of the tongs. Means for guiding the length of dental floss along the stationary and pivotal tongs and/or means for cutting the dental floss may also be provided.
    Type: Grant
    Filed: October 3, 1991
    Date of Patent: March 30, 1993
    Inventor: Jeffrey A. Stewart
  • Patent number: 5167718
    Abstract: Disclosed is an improved parylene deposition chamber wherein reactive monomer vapors enter the chamber tangentially so as to create a rotational flow of vapor within the interior of the chamber. A substrate support fixture is positioned within the chamber and rotated in a direction counter to the rotational flow of vapor. An annular space exists between the outer edge of the fixture and the inner wall of the chamber so as to allow the rotating vapor to descend freely within the chamber. Waste of parylene chemicals is minimized by eliminating the need for the positioning of baffles within the chamber.
    Type: Grant
    Filed: May 6, 1991
    Date of Patent: December 1, 1992
    Inventor: Jeffrey Stewart
  • Patent number: 5078091
    Abstract: Disclosed is an improved parylene deposition chamber wherein reactive monomer vapors enter the chamber tangentially so as to create a rotational flow of vapor within the interior of the chamber. A substrate support fixture is psoitioned within the chamber and rotated in a direction counter to the rotational flow of vapor. An annular space exists between the outer edge of the fixture and the inner wall of the chamber so as to allow the rotating vapor to descend freely within the chamber. Waste of parylene chemicals is minimized by eliminating the need for the positioning of baffles within the chamber.
    Type: Grant
    Filed: March 15, 1990
    Date of Patent: January 7, 1992
    Inventor: Jeffrey Stewart
  • Patent number: 4945856
    Abstract: Disclosed is a parylene deposition chamber wherein reactive monomer vapors enter the chamber tangentially so as to create a rotational flow of vapor within the interior of the chamber. A substrate support fixture is positioned within the chamber and rotated in a direction counter to the rotational flow of vapor. An annular space exists between the outer edge of the fixture and the inner wall of the chamber so as to allow the rotating vapor to descend freely within the chamber. Waste of parylene chemicals is minimized by eliminating the need for the positioning of baffles within the chamber.
    Type: Grant
    Filed: June 23, 1988
    Date of Patent: August 7, 1990
    Inventor: Jeffrey Stewart
  • Patent number: 4591069
    Abstract: Magazine dispensing apparatus has a housing with a delivery opening disposed in a lower region of a front wall of the housing. A number of selectively actuatable dispenser units are disposed within the housing. Each has a lower platform and a supporting structure for supporting and retaining a stack of magazines. The platform is formed with a forwardly and rearwardly extending slot through which runs the upper flight of an endless conveyor on which an ejector bar is connected. When the conveyor is actuated, it sweeps the ejector bar forwardly along the platform, displacing the lowermost magazine forwardly until it is free of the stack and falls freely downwardly to a chute which passes it to the delivery opening.
    Type: Grant
    Filed: November 14, 1983
    Date of Patent: May 27, 1986
    Inventor: Jeffrey A. Stewart