Patents by Inventor David L. Carroll

David L. Carroll 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: 7206114
    Abstract: The present invention is directed to optical devices. More specifically, the disclosed devices include a film defining a periodic array of surface elements so as to give rise to surface plasmon polaritons. The film also includes at least a single aperture having a diameter less than the wavelength of light. In one embodiment, the surface elements can be an array of anisotropic apertures and the films can act as a polarizer. The disclosed devices can also include a material having a variable refractive index substantially adjacent to the metal film. For example, the refractive index of the adjacent material can vary according to some characteristic of the light incident to the device, for instance, the intensity or the angle of incidence of the light. In this embodiment, resonant coupling of incident light with the SPP, and hence transmittivity of the device, can depend upon the nature of incident light.
    Type: Grant
    Filed: September 8, 2006
    Date of Patent: April 17, 2007
    Assignee: Clemson University
    Inventors: John Ballato, David L. Carroll, Jeffrey R. Dimaio
  • Patent number: 7110154
    Abstract: The present invention is directed to optical devices. More specifically, the disclosed devices include a film defining a periodic array of surface elements so as to give rise to surface plasmon polaritons. The film also includes at least a single aperture having a diameter less than the wavelength of light. In one embodiment, the surface elements can be an array of anisotropic apertures and the films can act as a polarizer. The disclosed devices can also include a material having a variable refractive index substantially adjacent to the metal film. For example, the refractive index of the adjacent material can vary according to some characteristic of the light incident to the device, for instance, the intensity or the angle of incidence of the light. In this embodiment, resonant coupling of incident light with the SPP, and hence transmittivity of the device, can depend upon the nature of incident light.
    Type: Grant
    Filed: June 10, 2004
    Date of Patent: September 19, 2006
    Assignee: Clemson University
    Inventors: John Ballato, David L. Carroll, Jeffrey R. Dimaio
  • Patent number: 6977509
    Abstract: A system and method for high voltage testing of twisted insulated conductors includes a high voltage power supply to be disposed within a rotating mechanism of a twinner. An electrode is coupled to the power supply and is to be disposed adjacent to a take-up reel within the rotating mechanism of the twinner. The electrode is for generating sparks between the electrode and the twisted insulated conductors when a fault in the insulation of the twisted conductors, when being wound on the take-up reel, passes by the electrode. A transmitter is to be disposed within the rotating mechanism for transmitting a signal carrying information representative of fault detection characteristics of the twisted insulated conductors. The information is derived from the sparks generated between the electrode and the twisted insulated conductors. A receiver is to be disposed outside of the rotating mechanism for receiving the signal from the transmitter.
    Type: Grant
    Filed: March 17, 2004
    Date of Patent: December 20, 2005
    Assignee: Clinton Instrument Company
    Inventors: David L. Carroll, Theodore P. Lane, Thomas Listorti, Matthew D. Corcoran
  • Patent number: 6947208
    Abstract: An amplifying optical element for use within an optical fiber communication system is disclosed which includes a doped optical fiber, an optical excitation source which is physically integrated with and immediately adjacent to and surrounding doped optical fiber, the excitation source being capable of emitting sufficient light to enable power gain of the signal being transmitted, and an external power source electrically connected to the optical excitation source for initiating and maintaining the light emission. Preferably, the excitation source is a multilayer electrically conductive structure which includes a first layer immediately adjacent to the doped optical fiber, wherein the first layer is a transparent, electrically conductive material, a second layer adjacent to the first layer, wherein the second layer is an electroluminescing material, and a third layer adjacent to the second layer, wherein the third layer is an electrically conductive material.
    Type: Grant
    Filed: January 24, 2003
    Date of Patent: September 20, 2005
    Inventors: John Ballato, David L. Carroll
  • Publication number: 20030184852
    Abstract: An amplifying optical element for use within an optical fiber communication system is disclosed which includes a doped optical fiber, an optical excitation source which is physically integrated with and immediately adjacent to and surrounding doped optical fiber, the excitation source being capable of emitting sufficient light to enable power gain of the signal being transmitted, and an external power source electrically connected to the optical excitation source for initiating and maintaining the light emission. Preferably, the excitation source is a multilayer electrically conductive structure which includes a first layer immediately adjacent to the doped optical fiber, wherein the first layer is a transparent, electrically conductive material, a second layer adjacent to the first layer, wherein the second layer is an electroluminescing material, and a third layer adjacent to the second layer, wherein the third layer is an electrically conductive material.
    Type: Application
    Filed: January 24, 2003
    Publication date: October 2, 2003
    Inventors: John Ballato, David L. Carroll
  • Patent number: 6501780
    Abstract: A method, apparatus and system are provided herein for an electrically assisted chemical oxygen iodine laser. The preferred system, in accordance with the present invention, includes a laser resonator with a laser-active gas mixture of at least excited oxygen and dissociated iodine. A first electrical generator in which a primary flow of at least excited oxygen is electrically generated from a first gas that includes at least ground state oxygen. A second electrical generator in which a secondary flow of at least dissociated iodine atoms is electrically generated from a second gas that includes at least diatomic iodine. The system further includes a means to inject the secondary flow into the primary flow to generate the laser-active gas mixture.
    Type: Grant
    Filed: April 10, 2001
    Date of Patent: December 31, 2002
    Assignee: CU Aerospace
    Inventors: David L. Carroll, Wayne S. Solomon, Joseph T. Verdeyen
  • Publication number: 20010036215
    Abstract: A method, apparatus and system are provided herein for an electrically assisted chemical oxygen iodine laser. The preferred system, in accordance with the present invention, includes a laser resonator with a laser-active gas mixture of at least excited oxygen and dissociated iodine. A first electrical generator in which a primary flow of at least excited oxygen is electrically generated from a first gas that includes at least ground state oxygen. A second electrical generator in which a secondary flow of at least dissociated iodine atoms is electrically generated from a second gas that includes at least diatomic iodine. The system further includes a means to inject the secondary flow into the primary flow to generate the laser-active gas mixture.
    Type: Application
    Filed: April 10, 2001
    Publication date: November 1, 2001
    Inventors: David L. Carroll, Wayne S. Solomon, Joseph T. Verdeyen
  • Patent number: 4951841
    Abstract: There is disclosed a substrate of layers of materials comprising ethylene vinyl alcohol copolymer layers having sandwiched therein between a metal foil layer and a paper layer all suitably adhered to one another. It is also contemplated that the substrate be employed in fabricating a dentifrice tube.
    Type: Grant
    Filed: December 28, 1984
    Date of Patent: August 28, 1990
    Assignee: Colgate-Palmolive Company
    Inventors: Edward A. Tavss, Samuel C. Temin, John Santalucia, David L. Carroll
  • Patent number: 4693395
    Abstract: There is disclosed a substrate of layers of materials comprising ethylene propylene copolymer layers having sandwiched therein between a metal foil layer and a paper layer all suitably adhered to one another. It is also contemplated that the substrate be employed in fabricating a dentifrice tube.
    Type: Grant
    Filed: September 2, 1986
    Date of Patent: September 15, 1987
    Assignee: Colgate-Palmolive Company
    Inventors: Edward A. Tavss, John Santalucia, David L. Carroll
  • Patent number: 4608285
    Abstract: There is disclosed a substrate of layers of materials comprising acetal polymer layers having sandwiched therein between a metal foil layer and a paper layer all suitably adhered to one another. It is also contemplated that the substrate be employed in fabricating a dentifrice tube.
    Type: Grant
    Filed: December 29, 1983
    Date of Patent: August 26, 1986
    Assignee: Colgate-Palmolive Company
    Inventors: Edward A. Tavss, David L. Carroll
  • Patent number: 4080441
    Abstract: An antibacterial oral composition effective to promote oral hygiene containing an antibacterial antiplaque agent and an additive which reduces staining of dental surfaces without substantially diminishing the antibacterial and antiplaque activity of the agent. Bis-biguanido hexanes, such as chlorhexidine and alexidine, and quaternary ammonium salts, such as benzethonium chloride and cetyl pyridinium chloride, are typical examples of antibacterial agents. The antistain additive is a bis(o-carboxyphenyl)ester of a C.sub.2-8 aliphatic dicarboxylic acid such as bis(o-carboxyphenyl)succinate.
    Type: Grant
    Filed: December 27, 1976
    Date of Patent: March 21, 1978
    Assignee: Colgate-Palmolive Company
    Inventors: Abdul Gaffar, Marijke S. DE Vries, David L. Carroll