Patents by Inventor P. Boyd

P. Boyd 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).

  • Publication number: 20030161440
    Abstract: Certain embodiments of the present invention provide a method and system for cine EBA/CTA imaging. The method includes positioning a patient at a first position in a CT scanner, scanning the patient during a first sweep beginning at a first triggering event, moving the patient to a second position, scanning the patient in a second sweep beginning at a second triggering event, and forming a series of motion images based on at least the first and second sweeps.
    Type: Application
    Filed: August 14, 2002
    Publication date: August 28, 2003
    Inventors: Douglas P. Boyd, Susan E. Candell
  • Publication number: 20030161434
    Abstract: A scanning electron beam computed tomographic system eliminates axial offset between target and detector by disposing the target, collimator, and detector such that active portions of the target and detector are always diametrically opposite each other. This result is achieved by providing a helical target, collimator, and detector, or by providing planar target, collimator, and detector components that are inclined relative to the vertical axis such that active portions of the target and detector are always diametrically opposite each other. Either configuration eliminates cone beam error and the necessity to correct for same. Further, the system can provide multi-slice scanning of an object that is in constant motion at a critical velocity, without having to interpolate data. Conventional helical scanning may still be undertaken. Detector elements can be disposed axially to improve signal/noise ratio and to produce a cone beam cancellation effect.
    Type: Application
    Filed: February 21, 2003
    Publication date: August 28, 2003
    Inventors: Roy E. Rand, Jonathan Harman, Douglas P. Boyd
  • Publication number: 20030149296
    Abstract: Compounds and compositions for the delivery of active agents are provided. Methods of administration and preparation are provided as well.
    Type: Application
    Filed: August 5, 2002
    Publication date: August 7, 2003
    Inventors: Maria Aurora P. Boyd, Andrea Leone-Bay, Doris C. O'Toole
  • Publication number: 20030121523
    Abstract: A semi-custom intraoral discluder device for preventing chronic tension and common migraine headaches and temporomandibular disorders that are caused or perpetuated by chronic activity of the temporalis muscle. The discluder includes a trough, contoured to encompass at least one maxillary or mandibular incisor, from which extends a protrusion, typically of a dome shape. The trough can be retained on the teeth by any adaptable material which can flow around the teeth and then maintain its shape. The adaptation of the retentive material can be performed by the end user, health care provider, or anyone trained in the art. Once in place in the wearer's mouth, one or two opposing incisor teeth will come into contact with the protrusion prior to the upper and lower posterior and/or canine teeth coming into contact, regardless of the position of the mandible, thereby reducing the intensity of the activity of the temporalis muscle.
    Type: Application
    Filed: December 27, 2001
    Publication date: July 3, 2003
    Inventor: James P. Boyd
  • Publication number: 20030116164
    Abstract: A semi-custom intraoral discluder device for preventing chronic tension and common migraine headaches and temporomandibular disorders that are caused or perpetuated by chronic activity of the temporalis muscle. The discluder includes a trough, contoured to encompass at least one maxillary or mandibular incisor, from which extends a protrusion, typically of a dome shape. The trough can be retained on the teeth by any adaptable material which can flow around the teeth and then maintain its shape. The adaptation of the retentive material can be performed by the end user, health care provider, or anyone trained in the art. Once in place in the wearer's mouth, one or two opposing incisor teeth will come into contact with the protrusion prior to the upper and lower posterior and/or canine teeth coming into contact, regardless of the position of the mandible, thereby reducing the intensity of the activity of the temporalis muscle.
    Type: Application
    Filed: December 14, 2001
    Publication date: June 26, 2003
    Inventor: James P. Boyd
  • Patent number: 6311145
    Abstract: A method for the design and optimization of inductors for RF circuits. This method consists in the formulation of RF circuit designs as geometric programs. The designer can specify a wide variety of specifications such as gain, bandwidth, noise, etc. The method, which was implemented in simple code, determines inductor dimensions and component values in a few seconds real-time. The results was also a globally optimal design.
    Type: Grant
    Filed: June 17, 1999
    Date of Patent: October 30, 2001
    Assignee: The Board of Trustees of the LeLand Stanford Junior University
    Inventors: Maria del Mar Hershenson, Stephen P. Boyd, Sunderarajan S. Mohan
  • Patent number: 6289490
    Abstract: A method for optimizing an integrated circuit uses a dominant time constant of a transition of the circuit. A physical layout of the circuit is characterized in terms of design parameters. The circuit is modeled by a conductance matrix G and a capacitance matrix C, wherein G and C are affine functions of the design parameters. The optimization method comprises the step of finding the values of the design parameters that optimize a property of the circuit while simultaneously enforcing a constraint that the dominant time constant must be less than a maximum value tmax. Mathematically, the constraint on the dominant time constant can be written: tmax G−C≧0. The optimization method can be used when the circuit has a non-tree topology. Furthermore, when the design parameters comprise variables that relate to sizes of elements of the circuit, a topology of the circuit is optimized by the optimization method.
    Type: Grant
    Filed: October 8, 1998
    Date of Patent: September 11, 2001
    Assignee: The Board of Trustees of the Leland Stanford Junior University
    Inventors: Stephen P. Boyd, Abbas El Gamal, Lieven Vandenberghe
  • Patent number: 6269277
    Abstract: A system for designing and optimizing integrated circuits. Design objectives and constraints are described as posynomial functions of the design parameters. The circuit design problem is then expressed as a special form of optimization problem called geometric programming, to which very efficient global optimization methods are applied. The present invention can thereby efficiently determine globally optimal circuit designs, or globally optimal trade-offs among competing performance measures such as, for example for an operational amplifier (op-amp), power, open-loop gain, and bandwidth. The present invention therefore yields automated synthesis of globally optimal circuit designs for a given circuit topology library, directly from specifications.
    Type: Grant
    Filed: July 27, 1998
    Date of Patent: July 31, 2001
    Assignee: The Leland Stanford Junior University Board of Trustees
    Inventors: Maria del Mar Hershenson, Stephen P. Boyd, Thomas H. Lee
  • Patent number: 6231337
    Abstract: A method of making an occlusally retained mouthpiece. A mouthpiece substrate is coated with a resin precursor that is neither caustic nor irritating to teeth or gingival tissue. The resin precursor is curable to form a resin selected from the group consisting of Bisphenol A diglycidyl ether dimethacrylate and urethane dimethacrylate. The substrate is pressed against teeth with the teeth pressed into the resin coating. When the resin is partially cured to a shape retaining state, it is removed from the teeth and curing is completed to form a tough flexible material. Alternatively, the substrate may be held against the teeth and the resin precursor may be applied along the teeth-substrate interface with a mixing syringe. High intensity light may be used to cure the resin or enhance catalytic curing. For best results the substrate is made from the same material as is applied to the teeth.
    Type: Grant
    Filed: January 24, 2000
    Date of Patent: May 15, 2001
    Inventor: James P. Boyd
  • Patent number: 5795150
    Abstract: An intraoral semi-custom device for the prevention of chronic tension and common migraine headaches and temporomandibular disorders that are caused by chronic clenching of the posterior mandibular and maxillary teeth by the temporalis muscle. The device includes a trough, curved to correspond to the curvature of the maxillary incisors, from which distally extends a dome shape. The trough and dome are formed from a reshapable synthetic resin sheet material. The trough is retained by a cured in place acrylic resin, which is placed into the trough by a dentist and then placed over the maxillary incisors by the dentist. The cured, now substantially rigid, acrylic fits tightly and retains the device around the wearer's upper incisors. Once in place in the wearer's mouth, the dome will come into contact with one or two lower incisor teeth prior to the posterior teeth coming into contact.
    Type: Grant
    Filed: March 3, 1997
    Date of Patent: August 18, 1998
    Inventor: James P. Boyd
  • Patent number: 5605755
    Abstract: A fiber blend for use in friction materials. The fiber contains a blend of a highly fibrillated fiber, such as a fibrillated polyacrylonitrile fiber and a fiber with a high carbon content, such as an oxidized carbon fiber precursor.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: February 25, 1997
    Assignee: Textron Systems Corporation
    Inventors: Arvind S. Patil, George P. Boyd, Jr.
  • Patent number: 5513656
    Abstract: An intraoral semi-custom device for the prevention of chronic tension and common migraine headaches and temporomandibular disorders that are caused by chronic clenching of the posterior mandibular and maxillary teeth by the temporalis muscle. The semi-custom discluder is a small intraoral device which is obtained and modified by an individual wearer. The device includes a trough, curved to correspond to the curvature of the maxillary incisors, from which distally extends a dome shape. The trough is retained by a resilient material, usually silicone, which is placed into the trough by the wearer and then placed over the maxillary incisors by the wearer. The cured silicone acts as a gasket and retains the device around the wearer's upper incisors. Once in place and the wearer their mouth, the dome will come into contact with one or two lower incisor teeth prior to the posterior teeth coming into contact.
    Type: Grant
    Filed: March 27, 1995
    Date of Patent: May 7, 1996
    Inventor: James P. Boyd, Sr.
  • Patent number: 5508109
    Abstract: A fiber blend for use in friction materials. The fiber contains a blend of a highly fibrillated fiber, such as a fibrillated polyacrylonitrile fiber and a fiber with a high carbon content, such as an oxidized carbon fiber precursor.
    Type: Grant
    Filed: October 6, 1993
    Date of Patent: April 16, 1996
    Assignees: Avco Corporation, Monsanto Company
    Inventors: Arvind S. Patil, George P. Boyd, Jr.
  • Patent number: 5491734
    Abstract: A scanning electron beam CT system generates an electron beam along a beam source axis offset from the scanner axis, or axis of symmetry, thereby permitting the X-ray subject to pass completely through the stationary gantry. The electron beam is produced with the first drift tube region of an evacuated housing chamber, and is directed downstream toward a second region that includes a gantry. A scan target and a tuning target, each concentric with and defining a plane normal to the system axis of symmetry, are located in the gantry. A beam optics system, through which the electron beam passes, is located within the housing intermediate the electron gun and gantry. A control system focusses and scans the electron beam upon the scan target, maintaining a beam spot of desired quality. Upon impingement by the scanning beam spot, the scan target emits a fan beam of X-rays.
    Type: Grant
    Filed: December 14, 1993
    Date of Patent: February 13, 1996
    Assignee: Imatron, Inc.
    Inventors: Douglas P. Boyd, Roy E. Rand
  • Patent number: 5433991
    Abstract: A reinforcement system for mastic intumescent fire protection coatings. Free floating hybrid mesh embedded in the coating is used to reinforce the coating. The hybrid mesh is made from a combination of high temperature and low temperature yarns.
    Type: Grant
    Filed: October 7, 1994
    Date of Patent: July 18, 1995
    Assignee: Avco Corporation
    Inventors: George P. Boyd, Jr., George K. Castle
  • Patent number: 5337774
    Abstract: A system for use in winterizing/dewinterizing a watercraft marine engine is provided with a closed coolant storage tank having a cooperating pump, with an open coolant recovery tank having a separate cooperating pump, with coolant fluid transfer lines connecting the storage tank pump outlet to the recovery tank and connecting the recovery tank pump outlet to the storage tank, and a control for operating the storage tank pump and the recovery tank pump independently of each other.
    Type: Grant
    Filed: July 1, 1993
    Date of Patent: August 16, 1994
    Assignee: The Smart Corporation
    Inventor: Gary P. Boyd
  • Patent number: 5105456
    Abstract: A rotating x-ray tube includes an electron-beam accelerator assembly having an indirectly heated cathode structure. The cathode structure includes an electron-emitting region mounted at the center of a rotationally symmetric Pierce-cathode configuration. An electron beam travels along a selected path as the tube rotates so that the electron beam strikes selected portions of a target mounted within the tube as it rotates. Two magnetic coils and a ferromagnetic mirror plate are arranged to function as a single quadrupole electromagnet, which has its axis parallel to and offset from the electron beam and which elongates the electron beam in a radial direction.
    Type: Grant
    Filed: February 1, 1991
    Date of Patent: April 14, 1992
    Assignee: Imatron, Inc.
    Inventors: Roy E. Rand, Douglas P. Boyd, Kristian R. Peschmann
  • Patent number: 5085584
    Abstract: An intraoral discluding device for the prevention of chronic tension and common migraine headaches and temporal-mandibular joint syndrome that are caused by chronic clenching of the posterior mandibular and maxillary teeth by the temporalis muscle. The discluder is a small intraoral device which is custom made for the individual. The device includes a small, typically acrylic, dome-shaped tab supported by a conventional palatal member which is retained by bent orthodontic wire. The device is inserted in the mouth and retained against the upper anterior teeth with the tab extending such that as the mouth is closed the tab will come into contact with the lower anterior incisal edges before the posterior teeth can touch each other. This renders the temporalis muscles ineffective, preventing high pressure clenching of the posterior teeth.
    Type: Grant
    Filed: July 1, 1991
    Date of Patent: February 4, 1992
    Inventor: James P. Boyd
  • Patent number: 5014293
    Abstract: A scanner assembly having a C-shaped gantry rotatably supported by a support head. An x-ray source and a detector assembly are mounted on said gantry for independent movement with respect to one another along said gantry.
    Type: Grant
    Filed: October 4, 1989
    Date of Patent: May 7, 1991
    Assignee: Imatron, Inc.
    Inventors: Douglas P. Boyd, Giovanni Lanzara
  • Patent number: RE34162
    Abstract: A method of manufacturing controlled .Iadd.surface .Iaddend.electrical resistivity carbon fiber sheet products employing a carbonizable starting material, heating and drawing the starting material (if required), .Iadd.stabilizing and .Iaddend.oxidizing the starting material .Iadd.if required .Iaddend.at an elevated temperature of the order of 220 degrees Centigrade to effect molecular aromatic rearrangement of the starting material, .Iadd.partially .Iaddend.carbonizing the oxidized starting material at .[.an.]. elevated temperature .Iadd.values .Iaddend.in an oxygen free atmosphere within a furnace having an elevated temperature extending over a temperature range .Iadd.from about 370 degrees Centigrade .Iaddend. to about 1400 degrees Centigrade .[.by soaking the.]..Iadd.. The .Iaddend.starting material .Iadd.is soaked .Iaddend.at an elevated temperature for a predetermined period of time to provide a .Iadd.known .Iaddend.preselected .Iadd.surface .Iaddend.electrical resistivity to the .Iadd.partially .
    Type: Grant
    Filed: February 20, 1990
    Date of Patent: January 19, 1993
    Assignee: Zoltek Corporation
    Inventor: George P. Boyd, Jr.