Patents Assigned to The University of Illinois
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Patent number: 5321001Abstract: Plant defoliating compositions comprising .delta.-aminolevulinic acid and one or more chlorophyll biosynthesis modulators; and methods of making and using same.Type: GrantFiled: July 17, 1992Date of Patent: June 14, 1994Assignee: The Board of Trustees of The University of IllinoisInventor: Constantin A. Rebeiz
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Patent number: 5294603Abstract: This invention is directed to didemnin derivatives, including N-acyl congeners of didemnin A (DA); several DDB-type analogues of DA in which either pyruvic acid has been replaced (with phenylpyruvic acid or alphaketobutyric acid) or proline at position 8 has been replaced [with L-azetidine-2-carboxylic acid (AZT), L-pipecolic acid (Pip), 1-amino-1-carboxylic cyclopentane (acc.sup.5), D-Pro or sarcosine (sar); and other cyclic depsipeptides related to the didemnins, which were isolated from a relatively polar extract of the tunicate T. solidum; namely the didemnins--X [(R)-3-hydroxy-decanoyl-(Gln).sub.3 -Lac-Pro didemnin A]; Y [(R)-3-hydroxy-decanoyl-(Gln).sub.4 -Lac-Pro didemnin A]; M (pGlu-Gln-Lac-Pro-didemnin A); N ([Tyr.sup.5 ] didemnin B); nordidemnin N ([Tyr.sup.5 ] nordidemnin B); and epididemnin A ([2S,4R-Hip.sup.2 ] didemnin A).Type: GrantFiled: February 18, 1992Date of Patent: March 15, 1994Assignee: The Board of Trustees of The University of IllinoisInventor: Kenneth L. Rinehart
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Patent number: 5262360Abstract: A method of forming a native oxide from an aluminum-bearing Group III-V semiconductor material is provided. The method entails exposing the aluminum-bearing Group III-V semiconductor material to a water-containing environment and a temperature of at least about 375.degree. C. to convert at least a portion of said aluminum-bearing material to a native oxide characterized in that the thickness of said native oxide is substantially the same as or less than the thickness of that portion of said aluminum-bearing Group III-V semiconductor material thus converted. The native oxide thus formed has particular utility in electrical and optoelectrical devices, such as lasers.Type: GrantFiled: June 24, 1991Date of Patent: November 16, 1993Assignee: The Board Of Trustees Of The University Of IllinoisInventors: Nick Holonyak, Jr., John M. Dallesasse
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Patent number: 4841148Abstract: A thermally compensated tube scanner scanning tunneling microscope utilizes two concentric piezoelectric tubes, one for scanning and one for coarse translation as well as fine adjustment of sample position while in tunneling range. There are no mechanical components such as springs, levers, gears, or stepper motors which are known to result in considerable vibration sensitivity and thermal drift. Consequently, the standard mode of atomic resolution operation for the device is without vibration isolation and with a thermal drift of less than 1 angstrom per hour.Type: GrantFiled: March 21, 1988Date of Patent: June 20, 1989Assignee: The Board of Trustees of The University of IllinoisInventor: Joseph W. Lyding
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Patent number: 4737510Abstract: Novel bioactive metabolites from the Caribbean sponge Agelas coniferin are disclosed. These compounds are generically referred to as halopyrroles. They exhibit antiviral and antibacterial properties, and, thus, are useful for various non-therapeutic and therapeutic purposes.Type: GrantFiled: September 30, 1986Date of Patent: April 12, 1988Assignee: The Board of Trustees of The University of IllinoisInventor: Kenneth L. Rinehart, Jr.
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Patent number: 4639275Abstract: A method is disclosed for converting a multilayer semiconductor structure, that includes active semiconductor regions interposed between semiconductor barrier layers, into a disordered alloy by introduction of a specified disordering element into the multilayer structure. Devices made using the method are also disclosed.Type: GrantFiled: August 31, 1984Date of Patent: January 27, 1987Assignee: The Board of Trustees of The University of IllinoisInventor: Nick Holonyak, Jr.
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Patent number: 4594603Abstract: A semiconductor device is disclosed, which includes a disordered alloy converted from at least a first active semiconductor region and a second semiconductor barrier layer that have been disordered by introduction of a disordering element selected from the group consisting of silicon and krypton such that the alloy exhibits a higher energy gap than the first active semiconductor region.Type: GrantFiled: January 24, 1985Date of Patent: June 10, 1986Assignee: Board of Trustees of The University of IllinoisInventor: Nick Holonyak, Jr.
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Patent number: 4574280Abstract: An AC gas discharge logic device with two input electrodes and an output electrode isolated by dielectric material from a dischargeable gas. Upon coupling suitable signals to the input electrodes, the gas is discharged and a voltage level at the dielectric material associated with the input electrodes is established which is different than the initial voltage level at the dielectric material associated with the output electrode. The subsequent voltage level of the output electrode after the gas discharge thus approaches the established voltage level at the input electrodes. An AC gas discharge panel with a plurality of the aforementioned logic devices included within the panel structure.Type: GrantFiled: January 28, 1983Date of Patent: March 4, 1986Assignee: The Board of Trustees of The University of IllinoisInventor: Larry F. Weber
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Patent number: 4511408Abstract: Silicon or krypton is used as a disordering element to selectively disorder layers in a heterojunction III-V semiconductor.Type: GrantFiled: April 22, 1982Date of Patent: April 16, 1985Assignee: The Board of Trustees of The University of IllinoisInventor: Nick Holonyak, Jr.
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Patent number: 4496165Abstract: An adjustable collet is provided comprising a step collet, a plurality of machinable and removable jaws, and means for interlocking the jaws with the step collet. The interlocking means comprise counter-bored and threaded holes spaced on the face of the collet, and hollow bosses projecting from one surface of the jaws and aligned with counter-bored or counter-sunk holes on the opposite surface, the interlocking means being effected by mating the jaw bosses with the holes in the collet face and by engaging screws passing through the holes and bosses in the jaws to the threaded holes in the collet face. To further increase the capacity of the collet, extension bars are utilized that incorporate the above-described interlocking means.Type: GrantFiled: January 18, 1983Date of Patent: January 29, 1985Assignee: The Board of Trustees of The University of IllinoisInventors: Josef Schrekeis, Gerard P. Murphy
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Patent number: 4412001Abstract: The present invention provides a novel means for the isolation of bacterial luciferase and a novel affinity resin useful in said isolation.Type: GrantFiled: December 3, 1981Date of Patent: October 25, 1983Assignee: Board of Trustees of The University of IllinoisInventors: Thomas O. Baldwin, Thomas F. Holzman
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Patent number: 4369195Abstract: A textured soybean product is produced from full-fat soybean by hydrating whole soybean by treatment with a dilute alkaline solution; mixing the hydrated soybean with full-fat soy flour and equilibrating the moisture content thereof; and passing the mixture through an extrusion cooker. The textured product has excellent flavor, color, and appearance, and can be formulated into an all-vegetable ground meat analogue or it can be used as an extender in blends with ground meat.Type: GrantFiled: July 25, 1979Date of Patent: January 18, 1983Assignee: The University of Illinois FoundationInventors: Alvin I. Nelson, Johnnie S. Leigh
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Patent number: 4281086Abstract: Polymer bound multidentate complexes are prepared by reacting pendant benzyl chloride and benzyl iodide groups on a variety of polymer supports, including crosslinked polystyrene, with 3,3'-iminodiproprionitrile and reducing the nitrile groups by treatment with, for example, a boron hydride-tetrahydrofuran complex to form the amine. The amine is a precursor for other ligand systems; for example, the primary amine groups formed condense with an aldehyde or ketone to yield five coordinate Schiff base ligands. The polydentate amine ligand systems are useful for synthesis of chelating agents for sequestering metal ions from solution for purification or concentration purposes. Metal complexes of these ligands with manganese, iron, cobalt, nickel, copper, and zinc can be prepared which are useful as heterogeneous oxidation catalysts.Type: GrantFiled: May 12, 1980Date of Patent: July 28, 1981Assignee: The University of Illinois FoundationInventors: John H. Gaul, Jr., Russell S. Drago
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Patent number: 4239778Abstract: Novel azaprostanoic acid analogs of the formula ##STR1## wherein: R is C.sub.1 to C.sub.8 alkyl or benzyl; and a has a value of from 0 to 6 inclusive, and their pharmaceutically acceptable salts and esters. Preferred 13-aza and 15-aza compounds are active in the inhibition of arachidonic acid-induced platelet aggregation and, more specifically, are direct and specific antagonists of the activity of prostaglandin H.sub.2 and thromboxane A.sub.2.Type: GrantFiled: September 12, 1978Date of Patent: December 16, 1980Assignee: The University of Illinois FoundationInventors: Duane L. Venton, Guy C. Le Breton, Steven E. Enke
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Patent number: 4230828Abstract: Polymer bound multidentate complexes are prepared by reacting pendant benzyl chloride and benzyl iodide groups on a variety of polymer supports, including crosslinked polystyrene, with 3,3'-iminodiproprionitrile and reducing the nitrile groups by treatment with, for example, a boron hydride-tetrahydrofuran complex to form the amine. The amine is a precursor for other ligand systems; for example, the primary amine groups formed condense with an aldehyde or ketone to yield five coordinate Schiff base ligands. The polydentate amine ligand systems are useful for synthesis of chelating agents for sequestering metal ions from solution for purification or concentration purposes. Metal complexes of these ligands with manganese, iron, cobalt, nickel, copper, and zinc can be prepared which are useful as heterogeneous oxidation catalysts.Type: GrantFiled: December 11, 1978Date of Patent: October 28, 1980Assignee: The University of Illinois FoundationInventors: John H. Gaul, Jr., Russell S. Drago
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Patent number: 4225582Abstract: Live Bovine Herpesvirus A.T.C.C. VR-2003 is employed in vaccination of horses to confer immunity to infection by Equid Herpesvirus Type 1.Type: GrantFiled: March 8, 1979Date of Patent: September 30, 1980Assignee: The University of Illinois FoundationInventor: Robert A. Crandell
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Patent number: 4205000Abstract: The compound 1,2,5,6-dibenzo-9-oxa-[3.3.1]-bicyclonona-2,6-diene is prepared by the condensation of two moles of phenylacetaldehyde in the presence of a strong acid such as fluorosulfuric acid. The compound is a useful intermediate in the synthesis of pharmaceuticals, for example, antispasmodic and antiinflammatory agents.Type: GrantFiled: November 24, 1978Date of Patent: May 27, 1980Assignee: The University of Illinois FoundationInventor: Jacques Kagan
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Patent number: 4156916Abstract: We describe a method and apparatus for handling information coded in the form of groups of pulses in sequential time slots forming blocks, each block having the same number of time slots. In this pulse transmission system an analog signal is converted to the above pulse code for transmission, and reconverted to analog form by an integration process. The process and apparatus are also adapted to arithmetic operations. An averaging device, employed in both transmission and arithmetic systems, includes a shift register provided with means for producing a current corresponding to the number of stages of the shift register in a given state.Type: GrantFiled: December 21, 1976Date of Patent: May 29, 1979Assignee: The University of Illinois FoundationInventor: Wolfgang J. Poppelbaum
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Patent number: 4133874Abstract: Synthetic erythrocytes. Hemoglobin is encapsulated in lipid materials to form cells which are typically 0.1 to 10 microns in their greatest dimension. Preferably cholesterol and one or more phospholipids are included in the cell membrane. The lipid membrane is of such character and thinness that O.sub.2 --CO.sub.2 transfer thereacross is readily accomplished. The preferred encapsulation process utilizes ultrasonic energy.Type: GrantFiled: February 10, 1978Date of Patent: January 9, 1979Assignee: The University of Illinois FoundationInventors: Irving F. Miller, Ljubomir Djordjevich
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Patent number: 4098690Abstract: A process for treating wastewaters to reduce the ammonia content thereof comprising the steps of:A. contacting wastewater, having a dissolved ammonia content, with an ion exchanger having an affinity for ammonium ions whereby ammonium ions become sorbed onto said ion exchanger;B. separating said ion exchanger containing sorbed ammonium ions from the wastewater and then regenerating said ion exchanger and converting the ammonium ions thereon to nitrate ions by treating the ion exchanger with a concentrated salt solution and a culture of nitrifying bacteria whereby ions from the salt solution become absorbed onto the ion exchanger while ammonium ions on the ion exchanger are displaced into solution and oxidized by the nitrifying bacteria to nitrate ions; and,C. recycling the regenerated ion exchanger for further contact with wastewater.Type: GrantFiled: March 29, 1976Date of Patent: July 4, 1978Assignee: The University of Illinois FoundationInventor: Michael J. Semmens