Patents Assigned to Physical Sciences, Inc.
  • Publication number: 20050104258
    Abstract: A polymer is directed from a source electrode into an electric field that drives the formation of electrospun fibers that are deposited onto a collecting surface to thereby form a patterned polymer structure. The collecting surface can be a counterelectrode or a collecting surface that is between the source electrode and a counterelectrode. Apparatus employed to conduct the method include an electrospinning source that directs polymer into an electric field formed by source and counterelectrodes. A collecting surface, such as the counterelectrode or a surface interposed between the source and counterelectrodes, collects electrospun fibers. Articles of manufacture formed by the method of apparatus include, for example, a structure of patterned electrospun fibers comprising multiple aggregations of polymeric electrospun fibers.
    Type: Application
    Filed: October 18, 2004
    Publication date: May 19, 2005
    Applicant: Physical Sciences, Inc.
    Inventor: John Lennhoff
  • Publication number: 20050034447
    Abstract: A vehicle includes at least one polyoxymethylene structural support member. The polyoxymethylene structural support member includes a polyoxymethylene component that is a propellant that provides thrust to the vehicle upon pyrolysis or combustion of the polyoxymethylene component of the product of pyrolysis of the polyoxymethylene component. The vehicle can be a satellite or other type of spacecraft.
    Type: Application
    Filed: October 17, 2003
    Publication date: February 17, 2005
    Applicant: Physical Sciences, Inc.
    Inventors: Prakash Joshi, Alan Gelb, Bernard Upschulte, B. Green
  • Publication number: 20050025974
    Abstract: The present invention is directed to the production of nanostructures, e.g., single wall carbon nanotubes (“SWNT”) and/or multi-wall carbon nanotubes (“MWNT”), from solutions containing a polymer, such as polyacrylonitrile (PAN). In particular, the invention is directed to the production of nanostructures, for example, SWNT and/or MWNT, from mixtures, e.g., solutions, containing polyacrylonitrile, polyaniline emeraldine base (PANi) or a salt thereof, an iron salt, e.g., iron chloride, and a solvent. In one embodiment, a mixture containing polyacrylonitrile, polyaniline emeraldine base or a salt thereof, an iron salt, e.g., iron chloride, and a solvent is formed and the mixture is electrospun to form nanofibers. In another embodiment, the electrospun nanofibers are then oxidized, e.g., heated in air, and subsequently pyrolyzed to form carbon nanostructures.
    Type: Application
    Filed: July 1, 2004
    Publication date: February 3, 2005
    Applicant: Physical Sciences, Inc.
    Inventor: John Lennhoff
  • Publication number: 20050012899
    Abstract: Systems and methods for providing a line-scanning laser ophthalmoscope (LSLO) are disclosed. The LSLO uses a substantially point source of light, such as an infrared laser or a super-luminescent diode. The point source is expanded to a line. The LSLO scans the line of light in a direction perpendicular to the line across a region of an eye having an undilated pupil The reflected light is received confocally, using monostatic beam geometry. A beam separator, such as a turning prism or mirror, diverts one of the incoming light and the reflected light to separate the light. An optical stop prevents non-confocally received light from reaching a one-dimensional detector, such as a linear CCD array. An electrical signal responsive to the output light at each of a plurality of locations along the line of output light is processed to provide images of the scanned portion of the eye.
    Type: Application
    Filed: June 9, 2004
    Publication date: January 20, 2005
    Applicant: Physical Sciences, Inc.
    Inventor: R. Ferguson
  • Patent number: 6838831
    Abstract: A persistent ionization plasma generator is described that forms a plasma in a cavity that persists for a time after termination of the exciting RF electric field. The plasma generator includes a RF cavity that is in fluid communication with a source of ionizing gas. The RF cavity can be at substantially atmospheric pressure. An RF power source that generates an RF electric field is electromagnetically coupled to the RF cavity. An ultraviolet light source is positioned in optical communication to the cavity. An antenna is positioned within the cavity adjacent to the ultraviolet light source. A chamber for confining the plasma can be positioned in the cavity around the antenna.
    Type: Grant
    Filed: June 24, 2002
    Date of Patent: January 4, 2005
    Assignee: Physical Sciences, Inc.
    Inventors: John E. Brandenburg, John F. Kline, Joshua H. Resnick
  • Patent number: 6783989
    Abstract: Polymeric compositions are provided for use in preparing sensors for the detection of extremely hazardous substances in the environment, such as chemical warfare agents. The polymers are inherently conductive and do not require the use of doping agents to achieve conductivity. The polymers are formulated with appropriate additives which are reactive with the hazardous substances, and are used to prepare sensors. The sensors can be assembled into an array and incorporated into monitoring devices which are highly accurate and relatively inexpensive.
    Type: Grant
    Filed: June 9, 2000
    Date of Patent: August 31, 2004
    Assignee: Physical Sciences, Inc.
    Inventor: Mitchell R. Zakin
  • Patent number: 6758564
    Abstract: Systems and methods for providing a line-scanning laser ophthalmoscope (LSLO) are disclosed. The LSLO uses a substantially point source of light, such as an infrared laser or a super-luminescent diode. The point source is expanded to a line. The LSLO scans the line of light in a direction perpendicular to the line across a region of an eye having an undilated pupil The reflected light is received confocally, using monostatic beam geometry. A beam separator, such as a turning prism or mirror, diverts one of the incoming light and the reflected light to separate the light. An optical stop prevents non-confocally received light from reaching a one-dimensional detector, such as a linear CCD array. An electrical signal responsive to the output light at each of a plurality of locations along the line of output light is processed to provide images of the scanned portion of the eye.
    Type: Grant
    Filed: June 14, 2002
    Date of Patent: July 6, 2004
    Assignee: Physical Sciences, Inc.
    Inventor: R. Daniel Ferguson
  • Publication number: 20020167277
    Abstract: A persistent ionization plasma generator is described that forms a plasma in a cavity that persists for a time after termination of the exciting RF electric field. The plasma generator includes a RF cavity that is in fluid communication with a source of ionizing gas. The RF cavity can be at substantially atmospheric pressure. An RF power source that generates an RF electric field is electromagnetically coupled to the RF cavity. An ultraviolet light source is positioned in optical communication to the cavity. An antenna is positioned within the cavity adjacent to the ultraviolet light source. A chamber for confining the plasma can be positioned in the cavity around the antenna.
    Type: Application
    Filed: June 24, 2002
    Publication date: November 14, 2002
    Applicant: Physical Sciences Inc.
    Inventors: John E. Brandenburg, John F. Kline, Joshua H. Resnick
  • Patent number: 6441552
    Abstract: A persistent ionization plasma generator is described that forms a plasma in a cavity that persists for a time after termination of the exciting RF electric field. The plasma generator includes a RF cavity that is in fluid communication with a source of ionizing gas. The RF cavity can be at substantially atmospheric pressure. An RF power source that generates an RF electric field is electromagetically coupled to the RF cavity. An ultraviolet light source is positioned in optical communication to the cavity. An antenna is positioned within the cavity adjacent to the ultraviolet light source. A chamber for confining the plasma can be positioned in the cavity around the antenna.
    Type: Grant
    Filed: April 29, 1999
    Date of Patent: August 27, 2002
    Assignee: Physical Sciences Inc.
    Inventors: John E. Brandenburg, John F. Kline, Joshua H. Resnick
  • Patent number: 6034768
    Abstract: The invention relates to high power, spark induced breakdown spectroscopy (SIBS) detectors with controllable delay time and to spark induced breakdown spectroscopy plasma generators with dual electrodes with specific electrode material, both for use in methods and apparatuses for detecting spectral signatures of atomic emissions, (e.g., from heavy metals such as lead, mercury, chromium, cadmium, arsenic, antimony and beryllium and radioactive materials such as uranium, plutonium, thorium and technetium) for measuring, for example, atomic concentrations of samples such as vapors and airborne particulates.
    Type: Grant
    Filed: July 13, 1998
    Date of Patent: March 7, 2000
    Assignee: Physical Sciences Inc.
    Inventors: Mark E. Fraser, Karl Holtzclaw, Amy Hunter, Steven J. Davis, Lawrence G. Piper
  • Patent number: 5997155
    Abstract: A method and apparatus for projecting a uniform projection of light by using a diffusive optic and non-imaging optic to receive light beams and uniformly distribute the light beams on a target. The uniform distribution of light diverges according to a pre-designed angle. The device allows for the use of multiple light sources which may be remotely located from the projection device. The projection device may be portable.
    Type: Grant
    Filed: March 31, 1997
    Date of Patent: December 7, 1999
    Assignee: Physical Sciences, Inc.
    Inventors: Alfred D. Ducharme, Takashi Nakamura
  • Patent number: 5973289
    Abstract: A microwave-driven plasma spraying apparatus can be utilized for uniform high-powered spraying. The plasma sprayer is constructed without a dielectric discharge tube, so very high microwave powers can be utilized. Moreover, the plasma sprayer is relatively free of contamination caused by deposits of heat-fusible material.
    Type: Grant
    Filed: February 17, 1998
    Date of Patent: October 26, 1999
    Assignee: Physical Sciences, Inc.
    Inventors: Michael E. Read, John F. Davis, III, Michael M. Micci
  • Patent number: 5943115
    Abstract: Apparatus and methods for tracking a feature on a target surface and continually providing analog corrections to tracking mirrors in real time by utilizing a low-power incoherent tracking beam to detect the movements of a reference feature on the target and confocal reflectometry to monitor the reflection from the tracking beam's current position are described.
    Type: Grant
    Filed: April 21, 1998
    Date of Patent: August 24, 1999
    Assignee: Physical Sciences, Inc.
    Inventor: R. Daniel Ferguson
  • Patent number: 5820627
    Abstract: A method for selectively ablating targeted biological material uses real-time optical feedback control to measure incandescent photoemissions emitted from irradiated biological material and, based on the measured incandescent photoemissions, adjust laser pulse parameters to selectively ablate targeted biological material. Laser pulses are directed to a target area of the subject using a delivery system. During each laser pulse, incandescent photoemissions emitted from the biological material having a wavelength of less than that of the laser pulses are measured. Based on such measured incandescent photoemissions, at least one of the wavelenght, pulse duration and energy level of each laser pulse are adjusted in order to selectively ablate targeted soft or hard biological material.
    Type: Grant
    Filed: March 28, 1996
    Date of Patent: October 13, 1998
    Assignee: Physical Sciences, Inc.
    Inventors: David I. Rosen, Charles L. Goldey, Gary B. Hayes
  • Patent number: 5793013
    Abstract: A microwave-driven plasma spraying apparatus can be utilized for uniform high-powered spraying. The plasma sprayer is constructed without a dielectric discharge tube, so very high microwave powers can be utilized. Moreover, the plasma sprayer is relatively free of contamination caused by deposits of heat-fusible material.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: August 11, 1998
    Assignee: Physical Sciences, Inc.
    Inventors: Michael E. Read, John F. Davis, III, Michael M. Micci
  • Patent number: 5767941
    Abstract: Apparatus and methods for tracking a feature on a target surface and continually providing analog corrections to tracking mirrors in real time by utilizing a low-power incoherent tracking beam to detect the movements of a reference feature on the target and confocal reflectometry to monitor the reflection from the tracking beam's current position are described.
    Type: Grant
    Filed: April 23, 1996
    Date of Patent: June 16, 1998
    Assignee: Physical Sciences, Inc.
    Inventor: R. Daniel Ferguson
  • Patent number: 5610932
    Abstract: A solid state dye laser incorporating a polyacrylamide gelatin solid host is doped with a laser dye such as rhodamine 6G and pyrromethene 556. The host is aligned within a lasing cavity and is excited to fluorescence by a pumping laser such as a second harmonic Nd:YAG. A container made from pyrex or inorganic oxide glass can be used to encapsulate and protect the gel solid. The solid state dye host exhibits "self healing" after photobleaching due to dye migration within the encapsulated form.
    Type: Grant
    Filed: January 25, 1995
    Date of Patent: March 11, 1997
    Assignee: Physical Sciences, Inc.
    Inventors: William J. Kessler, Steven J. Davis, Daniel R. Ferguson, Evan R. Pugh
  • Patent number: 5599511
    Abstract: An apparatus provides high temperature and short residence time conditions for the production of nanoscale ceramic powders. The apparatus includes a confinement structure having a multiple inclined surfaces for confining flame located between the surfaces so as to define a flame zone. A burner system employs one or more burners to provide flame to the flame zone. Each burner is located in the flame zone in close proximity to at least one of the inclined surfaces. A delivery system disposed adjacent the flame zone delivers an aerosol, comprising an organic or carbonaceous carrier material and a ceramic precursor, to the flame zone to expose the aerosol to a temperature sufficient to induce combustion of the carrier material and vaporization and nucleation, or diffusion and oxidation, of the ceramic precursor to form pure, crystalline, narrow size distribution, nanophase ceramic particles.
    Type: Grant
    Filed: May 24, 1995
    Date of Patent: February 4, 1997
    Assignee: Physical Sciences, Inc.
    Inventors: Joseph J. Helble, Gary A. Moniz, Theodore F. Morse
  • Patent number: 5556447
    Abstract: A process for treating wastes contaminated by toxic metals and/or organic materials is disclosed. The process involves heating the metal-contaminated wastes to a temperature sufficient to volatilize the metals. This temperature is also high enough to destroy or volatilize organic contaminants. The metal vapors are contacted with a sorbent which is reactive with the metals and sequesters them, thereby forming a non-leachable complex which can be disposed as non-hazardous conventional waste.
    Type: Grant
    Filed: January 23, 1995
    Date of Patent: September 17, 1996
    Assignee: Physical Sciences, Inc.
    Inventors: Srivats Srinivasachar, Joseph Morency, Daniel C. Itse
  • Patent number: 5461477
    Abstract: A spectrometer comprises a tunable interferometer for producing a monochromatic continuous image at an image plane and including two mirrors having substantially parallel surfaces and an adjustable spacing therebetween, a radiation detector located at the image plane for recording the image, a filter arrangement for allowing at least one predetermined range of wavelengths to pass to the detector, and a lens arrangement for collecting radiation and limiting radiation incident on the interferometer to an angle which is substantially perpendicular to the substantially parallel surfaces of the two mirrors.
    Type: Grant
    Filed: March 10, 1995
    Date of Patent: October 24, 1995
    Assignee: Physical Sciences, Inc.
    Inventors: William J. Marinelli, Karl W. Holtzclaw, Steven J. Davis, Byron D. Green