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Massachusetts Institute of Technology Patents
Assignee:
Massachusetts Institute of Technology
Address:
Cambridge, MA
No. of patents:
3125
Patents:




Patent Number Title Of Patent Date Issued
RE39196 Nanocrystalline apatites and composites, prostheses incorporating them, and method for their pro July 18, 2006
Methods for synthesis of nanocyrstalline apatites are presented, as well as a series of specific reaction parameters that can be adjusted to tailor, in specific ways, properties in the recovered product. Particulate apatite compositions having aveage crystal size of less than 150 nm
RE37932 Supermicrocellular foamed materials December 10, 2002
A supermicrocellular foamed material and a method for producing such material, the material to be foamed such as a polymerplastic material, having a supercritical fluid, such as carbon dioxide in its supercritical state, introduced into the material to form a foamed fluid/material system
RE37410 Controlled local delivery of chemotherapeutic agents for treating solid tumors October 16, 2001
A method and devices for localized delivery of a chemotherapeutic agent to solid tumors, wherein the agent does not cross the blood-brain barrier and is characterized by poor bioavailability and/or short half-lives in vivo, are described. The devices consist of reservoirs which release d
RE37134 Heat exchanger containing a component capable of discontinuous movement April 17, 2001
Regenerative heat exchangers are described for transferring heat between hot and cold fluids. The heat exchangers have seal-leakage rates significantly less than those of conventional regenerative heat exchangers because the matrix is discontinuously moved and is releasably sealed while
RE37053 Particles incorporating surfactants for pulmonary drug delivery February 13, 2001
Improved aerodynamically light particles for drug delivery to the pulmonary system, and methods for their synthesis and administration are provided. In a preferred embodiment, the aerodynamically light particles are made of a biodegradable material and have a tap density less than 0.4 g/
RE36986 Apparatus and methods for measuring permeability and conductivity in materials using multiple wa December 12, 2000
Devices and analytical techniques are disclosed for measuring spatial profiles of complex permeability and conductivity of a material by multiple wavenumber interrogations. Coil array structures are disclosed which define a number of different fundamental wavelengths (or wavenumbers)
RE36478 Processing of acoustic waveforms December 28, 1999
A sinusoidal model for acoustic waveforms is applied to develop a new analysis/synthesis technique which characterizes a waveform by the amplitudes, frequencies, and phases of component sine waves. These parameters are estimated from a short-time Fourier transform. Rapid changes in t
RE36352 High-efficiency, multilevel, diffractive optical elements October 26, 1999
The method utilizes high resolution lithography, mask aligning, and reactive ion etching. In particular, at least two binary amplitude masks are generated. A photoresist layer on an optical element substrate is exposed through the first mask and then etched. The process is then repea
RE36041 Face recognition system January 12, 1999
A recognition system for identifying members of an audience, the system including an imaging system which generates an image of the audience; a selector module for selecting a portion of the generated image; a detection means which analyzes the selected image portion to determine whe
RE35747 Method for determining tissue of origin and presence and extent of cellular abnormalities March 17, 1998
A biochemical procedure for identification and characterization of cells in a biopsy or sample of a body fluid. The method can be used to determine cell type, i.e. epidermal, neuronal; tissue of origin, i.e. breast tissue, liver tissue; and degree of abnormality. The procedure can also b
RE35068 Collapsible gel compositions October 17, 1995
Ionized crosslinked polyacrylamide gels are provided that are capable of drastic volume changes in response to minor changes in solvent concentration, temperature of pH or salt concentration of the solvent. The gels can contain a metal ion.
RE34812 Coupled-cavity Q-switched laser December 27, 1994
A Q-switched laser having a gain medium disposed within a first cavity and a second cavity whose optical path length is adjustable such that the quality of the first resonant cavity is affected. One aspect of the invention is the changing of the physical path length of the second cavity
RE33865 Detector for three-dimensional optical imaging March 31, 1992
The detector includes a focusing lens for focusing pulsed laser light reflected from an object onto a fiber optic array. The fiber optic array is configured to receive a two-dimensional image from the focusing lens and to convert the two-dimensional image into a line image. A streak
RE32782 Method for determining in vivo, bone strength November 15, 1988
A system for establishing, in vivo, the strength of bone in a live being such as, for example, a horse. The system permits determination of the speed of travel of sound through the bone and the strength of the bone is assessed on the basis of said speed of travel.The questions raised in
RE31287 Asynchronous logic array June 21, 1983
An asynchronous logic array capable of directly implementing Petri net specification of digital systems is disclosed. The array can be used in general synthesis of asynchronous digital circuits and systems. The parallel nature of the array gives the realized systems the speed and oth
RE30384 Solar cell August 26, 1980
An improved solar cell designed for optimum efficiency is comprised of a plurality of series connected unit solar cells formed from a common substrate of semiconductor material. Each unit solar cell has spaced elongate sidewalls, and a "dead space" area between adjoining sidewalls of
RE30383 High-intensity, solid-state-solar cell device August 26, 1980
A semiconductor solar cell capable of converting incident radiation to electrical energy at high efficiency includes a plurality of series-connected unit solar cells formed on a common wafer of semiconductor material. The unit solar cells each include a semiconductor substrate of one
RE30336 Solar-cell array July 15, 1980
The invention contemplates a solar-cell construction wherein plural spaced elongate unit cells of an array are formed from a parallel-grooved single wafer of substrate material of a first conductivity type, with adjacent sidewalls of adjacent units at each inter-unit groove formation. In
RE30131 Generating and using coherent optical radiation October 30, 1979
Optical radiation generation and detection using metal-to-metal diode junctions. Coherent optical radiation is generated by using an antenna connected to a metal-to-metal diode junction with non-linear current-voltage characteristics and by coupling to the junction electromagnetic ra
RE29578 Electron tunneling device March 14, 1978
Tunneling electronic devices responsive to infrared and far infrared radiation are formed by overlapping deposits which define ultra-thin dielectric layers (less than aout 10 Angstrom thickness) between metal layers, and contact areas of the order of 1 micron.sup.2 or less. Preferred
7474983 Method for object identification and sensing in a bounded interaction space January 6, 2009
An interactive media table that includes a tabletop that supports of plurality of movable objects each of which is identified by a unique identification code and each of which can be moved from place to place on said tabletop surface by one or more media table users. A display unit p
7474410 Nanometer-precision tip-to-substrate control and pattern registration for scanning-probe lithogr January 6, 2009
An interferometric-spatial-phase imaging (ISPI) system includes an alignment mechanism for obtaining continuous six-axis control of a scanning probe tip with respect to a coordinate system attached to a substrate. A gap detection mechanism measures tip height above a substrate and co
7472637 Hierarchical material assemblies and articles for use in projectile impact protection January 6, 2009
A hierarchical composite armor is disclosed for protection against projectile impact comprising a plurality of platelets and a matrix substrate. The plurality of platelets are distributed in at least a first layer and in a second layer parallel to the first layer wherein the distribu
7472021 Atmospheric feature detection using Langrangian scalar integration December 30, 2008
Described are a method and a system for detecting an atmospheric feature. A value of a meteorological scalar field at an initial time is determined for a set of tracers. Each tracer is initialized at a first tracer location. An integration time is selected according to a coherence time
7471448 Surface phonon-polariton raman laser December 30, 2008
An optical device includes an input optical source that provides and optical signal to the optical device. A surface phonon polariton (SPP) nanostructure receives the optical signal that interacts with the SPP nanostructure to excite a Raman process and produce a Raman light signal.
7470473 Nanocrystal structures December 30, 2008
A structure including a grating and a semiconductor nanocrystal layer on the grating, can be a laser. The semiconductor nanocrystal layer can include a plurality of semiconductor nanocrystals including a Group II-VI compound, the nanocrystals being distributed in a metal oxide matrix. Th
7470379 Inorganic particle conjugates December 30, 2008
The ionic conjugates include an inorganic particle electrostatically associated with a macromolecule which can interact specifically with predetermined chemical species or biological targets.
7466878 Integrated polarization controllers with nano-electromechanical dielectric pertubation December 16, 2008
A polarization controller includes a phase retarder having a rotation about an {1,0,0} axis that receives an optical signal from a waveguide structure. At least one nanoelectromechanical dielectric perturber produces .+-.45.degree. birefringent axes by placing the at least one nanoel
7465871 Nanocomposites with high thermoelectric figures of merit December 16, 2008
The present invention is generally directed to nanocomposite thermoelectric materials that exhibit enhanced thermoelectric properties. The nanocomposite materials include two or more components, with at least one of the components forming nano-sized structures within the composite ma
7462471 Porous biodegradable polymeric materials for cell transplantation December 9, 2008
Polymeric materials are used to make a pliable, non-toxic, injectable porous template for vascular ingrowth. The pore size, usually between approximately 100 and 300 microns, allows vascular and connective tissue ingrowth throughout approximately 10 to 90% of the matrix following imp
7454909 Impedance shaping element for a control system November 25, 2008
An impedance shaping element (or more simply, an impedance shaper) physically alters or shapes the mechanical impedance of a drive system as it appears from an interface and facilitates use of feedback control to improve performance by altering or shaping a dynamic coupling between an
7453566 Hybrid plasma element monitor November 18, 2008
Hybrid plasma monitor. A ground electrode is spaced apart from a high voltage electrode supporting an electric discharge therebetween to generate a plasma. The ground electrode and the high voltage electrode form an annular region into which a sample is introduced for generating a pl
7452703 Uranium enrichment using microorganisms November 18, 2008
The present invention provides methods for separating isotopes of actinide elements such as uranium using microorganisms, e.g., metal or sulfate reducing bacteria. The microorganisms reduce the actinide element to form a precipitate, which contains a greater proportion of the lighter iso
7452664 Methods for identifying agents which alter histone protein acetylation November 18, 2008
Methods of identifying agents which alter the NAD-dependent acetylation status and mono-ADP-ribosylation of nuclear proteins are disclosed. The methods further include identifying agents which alter the life span or aging of a cell or an organism by determining the level of NAD-dependent
7451596 Multiple degree of freedom micro electro-mechanical system positioner and actuator November 18, 2008
A micro electro-mechanical system (MEMS) positioner, including an actuator and method for making the same, includes a stage formed within a first layer of semiconductor material, along with a series of beams, flexure hinges and controlled input thermal actuators. The actuators are op
7450800 Precise and permanent modification of the resonant frequency of a dielectric microcavity and cor November 11, 2008
A coupled resonator includes a plurality of resonators such that at least one of the resonators is modified so as to adjust the resonant frequency associated with the coupled resonator.
7449237 Microspheres including nanoparticles in the peripheral region November 11, 2008
A microparticle can include a central region and a peripheral region. The peripheral region can include a nanoparticle, such as a metal nanoparticle, a metal oxide nanoparticle, or a semiconductor nanocrystal. The microparticle can be a member of a monodisperse population of particle
7447410 CHG ring resonators November 4, 2008
A ring resonator structure includes a semiconductor substrate, a core, and a cladding. Either the core or the cladding comprises chalcogenide glass to improve electromagnetic confinement in the ring resonator structure.
7446130 Ionic colloidal crystals November 4, 2008
Ionic colloidal crystals (ordered multicomponent colloids formed by attractive electrostatic interactions) may be produced by controlling the surface potential and relative size of multiple populations of colloidal particles in suspension. Such suspensions are dried or otherwise caused
7444987 Fuel management system for variable anti-knock agent octane enhancement of gasoline engines November 4, 2008
Fuel management system for efficient operation of a spark ignition gasoline engine. Injectors inject an anti-knock agent such as ethanol directly into a cylinder of the engine. A fuel management microprocessor system controls injection of the anti-knock agent so as to control knock a
7443283 Methods and apparatus for connecting an intimate group by exchanging awareness cues and text, vo October 28, 2008
A personal communicator with context awareness in a wristwatch form for connecting intimate friends and family via awareness cues and text, voice instant message, or synchronous voice connectivity. Sensors worn with the watch produce raw data tracking location (via GPS), acceleration, an
7442529 Fluorescent probes for biological studies October 28, 2008
The present invention provides fluorescent compounds of formula (I) ##STR00001## and methods monitoring protein-protein interactions.
7442501 SQV nucleic acids and polypeptides October 28, 2008
The invention generally features sqv nucleic acid and polypeptide molecules associated with connective tissue diseases, progeroid disorders, and aging, and methods for isolating such molecules.
7437980 Flux-biased electromagnetic fast tool servo systems and methods October 21, 2008
A high bandwidth rotary fast tool servo provides tool motion in a direction nominally parallel to the surface-normal of a workpiece at the point of contact between the cutting tool and workpiece. Three or more flexure blades having all ends fixed are used to form an axis of rotation
7436221 Methods and apparatus for ultra-low leakage analog storage October 14, 2008
An analog storage cell circuit includes a switch that minimizes subthreshold conduction and diode leakage, as well as an accumulation-mode coupling mechanism to minimize overall switch leakage to minimize accumulation-mode leakage. In one embodiment, an analog storage circuit include
7435963 Flow cell and methods of use thereof October 14, 2008
This invention provides devices and apparatuses comprising the same, for windowless optical detection of particle-laden samples, for example aerosols or fluid suspensions. The devices make use of passive sheath flow as a mechanism for containing aerosol/fluid suspension flow. The ope
7435408 Porous particles comprising excipients for deep lung delivery October 14, 2008
Improved porous particles for drug delivery to the pulmonary system, and methods for their synthesis and administration are provided. In a preferred embodiment, the porous particles are made of a biodegradable material and have a mass density less than 0.4 g/cm.sup.3/. The particles
7433043 Two-dimensional spectral shearing interferometry for ultrafast pulse characterization October 7, 2008
The phase spectrum of an ultrashort pulse is measured based on two-dimensional spectral shearing interferometry with zero delay. The measurement is performed utilizing an optical source pulse from which is extracted a short pulse and from which a chirped component is generated. The c
7432893 Input device based on frustrated total internal reflection October 7, 2008
A touch panel in which two or more light sensors emit light into a transparent panel at an angle to sustain transmission through the panel by total internal reflection. The transmitted light is detected at an array of light detection positions around the periphery of the panel opposi
7432630 High power-to-mass ratio actuator October 7, 2008
A method for driving an actuator. The method includes applying an electrical potential across an electrostrictive material relative to a counterelectrode disposed within an electrolyte, thereby creating a double layer potential across a region of enhanced ionic concentration. A curre

 
 
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