| Patent Number |
Title Of Patent |
Date Issued |
| 7430356 |
Fabrication of optical waveguides in periodically poled lithium niobate |
September 30, 2008 |
| A method of fabricating an optical waveguide (18) comprises providing a sample of lithium niobate (10) that has one or more periodically poled gratings made by electric field poling, applying a patterned surface layer of metallic zinc (16) to a z-face of the sample so that the layer |
| 7337064 |
Electromagnetic surveying for hydrocarbon reservoirs |
February 26, 2008 |
| An electromagnetic survey method for surveying an area of seafloor that is thought or known to contain a subterranean hydrocarbon reservoir, comprising obtaining a first survey data set with a vertical electric dipole (VED) antenna for generating vertical current loops and a second s |
| 7312047 |
Screening assay for improvement of epithelial barrier function |
December 25, 2007 |
| The present invention relates to the use of an air-liquid interface culture model using asthmatic bronchial epithelial cells, which exhibit impaired epithelial barrier function. It is proposed to use asthmatic epithelial cultures, in the absence of added Th2 or proinflammatory cytoki |
| 7233607 |
Pulsed light sources |
June 19, 2007 |
| A source of pulses of coherent radiation at a wavelength of approximately 1 .mu.m, comprises a pump source for producing pump light; a laser cavity comprising an Yb.sup.3+-doped gain medium arranged to receive the pump light, the laser cavity being modelocked to generate laser pulses at |
| 7192610 |
Method of deactivating dust mite allergens |
March 20, 2007 |
| A method is provided for deactivating a Der-p and/or Der-f allergen which comprises volatilizing into a space to be treated a deactivating amount of a volatile oil selected from cajeput oil (tea tree oil) or an oil comprising one or more terpene hydrocarbons. |
| 7187569 |
Signal generation apparatus and method for seafloor electromagnetic exploration |
March 6, 2007 |
| An apparatus for generating electronic signals for application in subsea electromagnetic exploration. A surface generated high-voltage low-current source signal stabilized at a first frequency is supplied to a deep-tow vehicle (18) via an umbilical cable (16). The high-voltage low-curren |
| 7155099 |
Holey optical fibres of non-silica based glass |
December 26, 2006 |
| To overcome problems of fabricating conventional core-clad optical fibre from non-silica based (compound) glass, it is proposed to fabricate non-silica based (compound) glass optical fibre as holey fibre i.e. one contining Longitudinal holes in the cladding. This removes the conventi |
| 7136559 |
Optical fibre-based devices utilising the Raman effect |
November 14, 2006 |
| An optical fibre device based on the Raman effect comprises a first optical source to provide light at a first wavelength, and a holey optical fibre which receives the light from the first optical source such that optical gain or loss is provided at a second wavelength by the effect |
| 7026297 |
Neuroprotective agents |
April 11, 2006 |
| Compounds of formula (I) wherein: Q represents an amidino group, a cyano group or a group of formula XYN--, (where X and Y are hydrogen or various groups); R.sup.a represents alkylene; R.sup.b and R.sup.c each represents alkylene, the total number of carbon atoms in said straight chains |
| 6993258 |
WDM transmitter |
January 31, 2006 |
| A WDM transmitter comprising an array of M pump lasers multiplexed by an M.times.N multiplexer, in the form of a coupler, and used to feed an array of N optically pumped fiber lasers emitting at wavelengths .lamda..sub.1, .lamda..sub.2, . . . .lamda..sub.N. The parameter M determines |
| 6991891 |
Optical fiber laser |
January 31, 2006 |
| A method of fabricating a distributed feedback optical fiber laser, comprises the step of exposing an optical fiber (20) to a transverse light beam (30) to form a grating structure in a section of the optical fiber, the writing light beam being polarized in a direction not parallel t |
| 6968107 |
Holey optical fibres |
November 22, 2005 |
| An optical fiber structure having a holey fiber arranged in a holey outer support structure made up of holey tubes encased in a thin walled outer jacket. The holey fiber may have a solid core surrounded by a holey cladding having a plurality of rings of holes. With the invention it is |
| 6952307 |
Electric field poling of ferroelectric materials |
October 4, 2005 |
| A method of inducing a periodic variation of nonlinearity in a sample of ferroelectric material, comprises applying an electrically insulting mask to surface of the sample, applying an electric field across the sample to produce domain inversion in the sample, and removing the electric f |
| 6917631 |
Pulsed light sources |
July 12, 2005 |
| A source of pulses of coherent radiation at a wavelength of approximately 1 .mu.m, comprises a pump source for producing pump light, a laser cavity comprising an Yb.sup.3+ -doped gain medium arranged to receive the pump light, the laser cavity being modelocked to generate laser pulses at |
| 6901087 |
Broadband laser source |
May 31, 2005 |
| A broadband laser source comprising: a resonant cavity (1) containing a medium (2) which emits optical energy (3) in a continuum of wavelengths in response to application of pump energy (4) to the medium (2); a source of pump energy (5) for producing said optical energy (3); a frequency |
| 6877271 |
Method and apparatus for dispersing a volatile composition |
April 12, 2005 |
| An apparatus and method for dispersing a volatile composition, which method comprises dispersing the volatile composition into an air steam; and generating an ion wind, thereby causing the molecules of the composition to become electrically charged. The composition can be an insect r |
| 6831776 |
Periodic thermal poling of waveguides for quasi phase matching |
December 14, 2004 |
| A method of creating a varying second order non-linearity profile along a waveguide, comprising: providing a waveguide structure with a waveguiding core and a surface adjacent to the waveguiding core; structuring the surface to produce a structured surface defining a varying distance |
| 6813429 |
Sources of, and methods for generating, optical pulses |
November 2, 2004 |
| A source of optical pulses, comprises an optical source operable to generate ultrashort optical pulses at a first wavelength; and an optical fiber amplifier comprising an optical fiber having a core containing a dopant to provide optical gain at the first wavelength and anomalous dis |
| 6801356 |
Optical parametric devices and methods for making same |
October 5, 2004 |
| An optical parametric device for broadband parametric processes involving first and second frequencies .omega..sub.1 and .omega..sub.2. The device comprises an optical fiber comprising a core and a cladding, the cladding being microstructured with holes for providing waveguiding confinem |
| 6797699 |
Neuroprotective agents |
September 28, 2004 |
| Compounds of formula (I) wherein: Q represents an amidino group, a cyano group or a group of formula XYN--, (where X and Y are hydrogen or various groups); R.sup.a represents alkylene; R.sup.b and R.sup.c each represents alkylene, the total number of carbon atoms in said straight chains |
| 6701663 |
Method and apparatus for dispersing a volatile composition |
March 9, 2004 |
| An apparatus and method for dispersing a volatile composition, which comprises dispersing the composition into an air stream and generating an ion wind, thereby causing the molecules of the composition to become electrically charged. The composition can be an insect repellent, an ins |
| 6673357 |
Alkaloid glycoside for use as a medicament |
January 6, 2004 |
| The invention concerns an alkaloid glycoside for use in medicine. In a preferred aspect, the alkaloid glycoside is used for the stimulation of a class I-restricted immune response and/or a class II-restricted immune response. In a preferred aspect, the alkaloid glycoside is tomatine. |
| 6670280 |
Methods of microstructuring ferroelectric materials |
December 30, 2003 |
| A method of micro-structuring a surface of a sample of ferroelectric material, the method comprising: (a) taking a sample of ferroelectric material having a -z face which is to be etched; (b) illuminating the -z face with ultraviolet light to define illuminated and unilluminated parts |
| 6643442 |
Optical waveguides and devices including same |
November 4, 2003 |
| Optical waveguides having a waveguide channel of photosensitive silica glass with a modified refractive index optically written therein, wherein the photosensitive glass comprises oxides of silicon, tin and at least one Group I element, where such optical waveguide devices include optica |
| 6628864 |
Optical code generation and detection |
September 30, 2003 |
| Optical code division multiple access (OCDMA) coder:decoder gratings have been fabricated. The modulated refractive index profile that makes up the OCDMA coder:decoder grating incorporates changes in polarity between OCDMA chips by discrete phase shifts, thereby to provide bipolar coding |
| 6614975 |
Optical fiber and optical fiber device |
September 2, 2003 |
| An optical fibre has a cladding layer surrounding a core, the cladding layer comprising at least a first, relatively inner generally cylindrical region, a third, relatively outer generally cylindrical region, and a second region disposed between the first and third regions, the second |
| 6612510 |
Aerosol spraying |
September 2, 2003 |
| A method of improving the spraying of liquid droplets from a spray device onto a surface which method comprises imparting a unipolar charge to the said liquid droplets by double layer charging during the spraying of the liquid droplets from the spray device, the unipolar charge being at |
| 6592813 |
Malodour counteracting treatment |
July 15, 2003 |
| An improved method of counteracting or neutralizing airborne malodour comprising directing at the source of the malodour liquid droplets from a spray device containing a malodour counteracting composition, the improved method comprising imparting a unipolar charge to the said liquid drop |
| 6577801 |
Holey optical fibers |
June 10, 2003 |
| The percentage fraction of fundamental mode power located in the cladding holes of different holey fibers (PF.sub.holes) is shown as a function of wavelength in microns of the fundamental mode (.lambda.). Properties of two groups of holey fibers are shown. The upper group of three curves |
| 6503382 |
Method of electrodepositing a porous film |
January 7, 2003 |
| A method of preparing a porous film comprises electrodepositing material from a mixture onto a substrate, the mixture comprising: (I) a source of metal, inorganic oxide, non-oxide semiconductor/conductor or organic polymer, (II) a solvent such as water; and (III) a structure-directing |
| 6498669 |
Optical pulse propagation |
December 24, 2002 |
| A method of optical pulse propagation via a dispersive optical fibre, the method comprising the steps of: launching the optical pulses into the fibre at a pulse intensity sufficient to provide non-linear dispersion compensation during propagation through a first portion of the fibre; and |
| 6445852 |
Optical fiber grating |
September 3, 2002 |
| Methods and apparatus for creating a Bragg grating in an optical waveguide having an optical fiber on which the Bragg grating is defined, the Bragg grating having an actual response which closely approximates a desired response. The Bragg grating comprises a plurality of lines, each line |
| 6442304 |
Apparatus and method for protecting devices, especially fibre optic devices, in hostile environm |
August 27, 2002 |
| The present invention relates to protecting optical devices, such as an optical fibre sensor connected in series with a cable, from a hostile environment, such as encountered when making measurements in oil and gas wells. A liquid can protect the optical device. Packaging an optical fibr |
| 6304711 |
Optical glass, optical waveguide amplifier and optical waveguide laser |
October 16, 2001 |
| Neodymium-doped fluoroaluminate optical glass has a composition: 35 to 45 mol % AlF.sub.3; 5 to 30 mol % RF.sub.2, where R is selected from the group consisting of Ca, Mg, Sr and Ba; 5 to 25 mol % MF, where M is selected from the group consisting of Na, Li, K and Rb; and 0.001 to 10 |
| 6304362 |
Apparatus providing variable reflectivity to electromagnetic radiation |
October 16, 2001 |
| An optically responsive variable reflecting surface uses a body of gallium held at a temperature slightly below its bulk melting point. Irradiation of the surface with optical energy produces substantial changes in surface reflectance. Devices employing gallium may be used for switching |
| 6278818 |
Optical coupler and/or multiplexer |
August 21, 2001 |
| An optical fiber coupler has at least an m-core optical fiber optically coupled to an n-core optical fiber, where m and n are positive integers and m is greater than 1. A channel add/drop multiplexer includes an optical fiber coupler and a Bragg grating disposed on the m-core fiber o |
| 6221375 |
Pesticidal or herbicidal compositions |
April 24, 2001 |
| A pesticidal or herbicidal composition in particulate form which comprises composite particles. Each of said particles contains a core of an inert substance having a pesticidal herbicide associated therewith and a coating of an electrically resistive material around the core. The particl |
| 6203925 |
Porous metal and method of preparation thereof |
March 20, 2001 |
| A method of preparing a porous metal comprises reducing a mixture comprising (I) a source of metal; (II) a solvent such as water; and (III) a structure-directing agent such as octaethylene glycol monododecyl ether to form a liquid crystalline phase in the mixture. The reduction of the |
| 6199766 |
Targeting of flying insects with insecticides and apparatus for charging liquids |
March 13, 2001 |
| A method of killing flying insects which method comprises spraying into the air in which insects are flying liquid droplets of an insecticidal composition, a unipolar charge being imparted to the said liquid droplets by double layer charging and charge separation during spraying, the |
| 6160944 |
Optical waveguide device |
December 12, 2000 |
| Tin-doped photosensitive optical glass is disclosed, together with applications of the glass in fabricating waveguides and waveguide devices such as Bragg gratings. |
| 6137812 |
Multiple cavity fiber fabry-perot lasers |
October 24, 2000 |
| Multiple-cavity fiber optic lasers are fabricated with high-gain fibers in low-loss, high-finesse fiber ferrule resonance cavity configurations supported in low-loss ferrule alignment fixtures developed for use in FFP filters. These lasers incorporate rare-earth doped, sensitized glass f |
| 6071407 |
Magnetic separation |
June 6, 2000 |
| A method of generating an adsorbent product for use in magnetic separation of contaminants from an influent liquid comprises the steps of: (i) mixing at least one micro-organism with the liquid in a chemostat vessel; (ii) magnetically separating a magnetic fraction of liquid from the ves |
| 6045705 |
Magnetic separation |
April 4, 2000 |
| A method for high grade magnetic separation using a matrix having one or more magnetizable matrix elements, wherein each element comprises a pair of poles aligned substantially parallel to a direction of flow of a slurry fluid containing particles to be separated, whereby a rear fluid vo |
| 6041543 |
Pest trap having an electrostatically charged surface |
March 28, 2000 |
| Pest control wherein at least part of a pest is exposed to particles which carry an electrostatic charge, preferably of opposite polarity to that of the surface of the pest, and which may be sticky or tacky and comprise a wax, for example, a plant wax, such as, Carnauba wax, or an inorga |
| 6032406 |
Insect trap device |
March 7, 2000 |
| An insect trap device comprising a housing, the housing having an interior which is in communication with the atmosphere outside the device, the housing containing:(i) an insect attractant source;(ii) means for generating an ion wind to facilitate dispersal of the insect attractant sourc |
| 5930435 |
Optical filter device |
July 27, 1999 |
| Passive, self-adjusting and tracking optical wavelength filters are described. The filters are absorptive and can be of either transmissive or reflective type. The filters comprise an unpumped doped optical waveguide configured so that signals of different wavelength are spatially decoup |
| 5915050 |
Optical device |
June 22, 1999 |
| An optical device comprises an optical fiber directional coupler having at least a first optical fiber optionally coupled at a coupling region to a second optical fiber such that light can propagate in the coupling region in at least two possible electromagnetic transmission modes; and m |
| 5900244 |
Insect attractant |
May 4, 1999 |
| A method of attracting insects selected from the group consisting of houseflies, mosquitoes and wasps to a particular location, which method comprises placing at the said location a lure containing an effective attractant composition which comprises at least one compound which is a s |
| 5881197 |
Optical fibre and optical fibre device |
March 9, 1999 |
| An optical fiber has a cladding glass layer surrounding a glass core, in which a region (preferably annular) of the optical fiber partially overlapping the cladding and/or the core is formed of photosensitive glass. |
| 5800605 |
Process for the preparation of electrostatically charged particles |
September 1, 1998 |
| A process for the preparation of electrostatically charged particles of a high resistivity material which process comprises incorporating a unipolar charge into the material at a temperature at or above the glass transition temperature thereof or above the melting point thereof, the said |
