Patents by Inventor H. Langford
H. Langford 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).
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Patent number: 8152997Abstract: A stormwater control system including conveyance, filtration and discharge systems. The conveyance system includes a set of conduits and connections providing a flow path through a compacted soil embankment from an upper inlet to a lower discharge area of an underlying soil infiltration zone. The control system has configurations for transferring stormwater from pervious and impervious surfaces to the soil infiltration zone. The control system optionally includes a media filter device that may be installed within the conveyance system to intercept sediment and other contaminants prior to discharge within the underlying soil infiltration zone.Type: GrantFiled: July 12, 2011Date of Patent: April 10, 2012Assignee: N.L. Olson & Associates, Inc.Inventors: Norman L. Olson, Wesley R. Johnson, Richard H. Langford, II
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Patent number: 7988851Abstract: A stormwater control system including conveyance, filtration and discharge systems. The conveyance system includes a set of conduits and connections providing a flow path through a compacted soil embankment from an upper inlet to a lower discharge area of an underlying soil infiltration zone. The control system has configurations for transferring stormwater from pervious and impervious surfaces to the soil infiltration zone. The control system optionally includes a media filter device that may be installed within the conveyance system to intercept sediment and other contaminants prior to discharge within the underlying soil infiltration zone.Type: GrantFiled: August 31, 2009Date of Patent: August 2, 2011Assignee: N. L. Olson & Associates, Inc.Inventors: Norman L. Olson, Wesley R. Johnson, Richard H. Langford, II
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Publication number: 20110049028Abstract: A stormwater control system including conveyance, filtration and discharge systems. The conveyance system includes a set of conduits and connections providing a flow path through a compacted soil embankment from an upper inlet to a lower discharge area of an underlying soil infiltration zone. The control system has configurations for transferring stormwater from pervious and impervious surfaces to the soil infiltration zone. The control system optionally includes a media filter device that may be installed within the conveyance system to intercept sediment and other contaminants prior to discharge within the underlying soil infiltration zone.Type: ApplicationFiled: August 31, 2009Publication date: March 3, 2011Applicant: N. L. OLSON & ASSOCIATES, INC.Inventors: Norman L. Olson, Wesley R. Johnson, Richard H. Langford, II
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Publication number: 20080015187Abstract: Bicyclic pyrazoles of Formula I are inhibitors of HIV integrase and inhibitors of HIV replication: wherein Z is O or N(R8); n is an integer equal to zero or 1; and R1, R2, R3, R4, R5, R6, R7 and R8 are defined herein. The compounds are useful in the prevention and treatment of infection by HIV and in the prevention, delay in the onset, and treatment of AIDS. The compounds are employed against HIV infection and AIDS as compounds per se or in the form of pharmaceutically acceptable salts. The compounds and their salts can be employed as ingredients in pharmaceutical compositions, optionally in combination with other antivirals, immunomodulators, antibiotics or vaccines.Type: ApplicationFiled: June 3, 2005Publication date: January 17, 2008Inventors: John Wai, Peter Williams, H. Langford
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Publication number: 20080009490Abstract: Bicyclic uracils and related compounds are inhibitors of HIV integrase and inhibitors of HIV replication. In one embodiment, the compounds are of Formula I: wherein a, b, Y, R1, R2, R3 and R4 are defined herein. The compounds are useful in the prevention and treatment of infection by HIV and in the prevention, delay in the onset, and treatment of AIDS. The compounds are employed against HIV infection and AIDS as compounds per se or in the form of pharmaceutically acceptable salts. The compounds and their salts can be employed as ingredients in pharmaceutical compositions, optionally in combination with other antivirals, immunomodulators, antibiotics or vaccines.Type: ApplicationFiled: March 4, 2005Publication date: January 10, 2008Inventors: Peter Williams, John Wai, Mark Embrey, Donnette Staas, Linghang Zhuang, H. Langford
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Publication number: 20060024330Abstract: 8,9-Dihydroxydihydropyridopyrazine-1,6-diones and 8,9-dihydroxypyridopyrazine-1,6-diones are inhibitors of HIV integrase and inhibitors of HIV replication. In one embodiment, the pyridopyrazinediones are of Formula (I): (I), wherein R1, R2, R3, R4 and R5 are defined herein. The compounds are useful in the prevention and treatment of infection by HIV and in the prevention, delay in the onset, and treatment of AIDS. The compounds are employed against HIV infection and AIDS as compounds per se or in the form of pharmaceutically acceptable salts. The compounds and their salts can be employed as ingredients in pharmaceutical compositions, optionally in combination with other antivirals, immunomodulators, antibiotics or vaccines. Methods of preventing, treating or delaying the onset of AIDS and methods of preventing or treating infection by HIV are described.Type: ApplicationFiled: September 10, 2003Publication date: February 2, 2006Inventors: John Wai, Boyoung Kim, Thorsten Fisher, Linghang Zhuang, Peter Williams, Terry Lyle, H. Langford, Kyle Robinson
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Publication number: 20050176718Abstract: Aza- and polyaza-naphthalenyl carboxamide derivatives including certain quinoline carboxamide and naphthyridine carboxamide derivatives are described. These compounds are inhibitors of HIV integrase and inhibitors of HIV replication, and are useful in the prevention or treatment of infection by HIV and the treatment of AIDS, as compounds or pharmaceutically acceptable salts, or as ingredients in pharmaceutical compositions, optionally in combination with other antivirals, immunomodulators, antibiotics or vaccines. Methods of preventing, treating or delaying the onset of AIDS and methods of preventing or treating infection by HIV are also described.Type: ApplicationFiled: February 11, 2005Publication date: August 11, 2005Inventors: Neville Anthony, Robert Gomez, Steven Young, Melissa Egbertson, John Wai, Linghang Zhuang, Mark Embrey, Lekhanh Tran, Jeffrey Melamed, H. Langford, James Guare, Thorsten Fisher, Samson Jolly, Michelle Kuo, Debra Perlow, Jennifer Bennett, Timothy Funk
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Publication number: 20040167822Abstract: A transaction system conducts online transactions between a community of users associated with an organization and off-site vendors. Each user has an account for use in on-site transactions and other activities. The transaction system displays online items offered for sale by off-site vendors. The system can receive an order from a user for an item offered by an off-site vendor. The system determines if sufficient funds exist in the account of the user for the order and, if so, charges the account of the user for the order and transmits the order to the off-site vendor for order fulfillment. The system then pays the off-site vendor for the order.Type: ApplicationFiled: February 25, 2003Publication date: August 26, 2004Applicant: Blackboard Inc.Inventors: Michael L. Chasen, Timothy R. Chi, Christopher E. Etesse, William H. Langford, Jianjun Xu
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Patent number: 6736976Abstract: A fluid treatment device for reducing the level of a chemical compound in a fluid. The device comprises: a fluid inlet; a fluid outlet; a flow-through fluid treatment zone having comprising: a radiation source, an adsorbent and a photocatalyst. The fluid treatment zone is reversibly operable between: (i) a first mode in which the fluid flows in a first direction and at least a portion of the chemical compound is adsorbed on the adsorbent; and (ii) a second mode in which the fluid flows in a second direction different from the first direction in which the absorbed chemical compound is exposed to radiation from the radiation resulting in photooxidation of the chemical compound.Type: GrantFiled: April 19, 2001Date of Patent: May 18, 2004Inventors: Apostolos Kantzas, Cooper H. Langford, Amit Bhargava, Alex Starosud
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Publication number: 20020040874Abstract: A fluid treatment device for reducing the level of a chemical compound in a fluid. The device comprises: a fluid inlet; a fluid outlet; a flow-through fluid treatment zone having comprising: a radiation source, an adsorbent and a photocatalyst. The fluid treatment zone is reversibly operable between: (i) a first mode in which the fluid flows in a first direction and at least a portion of the chemical compound is adsorbed on the adsorbent; and (ii) a second mode in which the fluid flows in a second direction different from the first direction in which the adsorbed chemical compound is exposed to radiation from the radiation resulting in photooxidation of the chemical compound.Type: ApplicationFiled: April 19, 2001Publication date: April 11, 2002Inventors: Apostolos Kantzas, Cooper H. Langford, Amit Bhargava, Alex Starosud
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Patent number: 5981426Abstract: A photocatalyst compound comprising: (i) a photocatalyst selected from the group consisting of TiO.sub.2, WO.sub.3 and mixtures thereof, the photocatalyst being substantially free of sharp, narrow band X-ray reflections at angles corresponding those of crystalline TiO.sub.2, WO.sub.3 and mixtures thereof, and (ii) a porous, crystalline, adsorbent support material. A process for producing the photocatalyst compound is also disclosed. The process comprises: (i) hydrolysing a non-ionic titanium compound to produce a colloidal suspension having an average particle size of less than about 250 .ANG.; (ii) contacting a porous, crystalline, adsorbent support material with the colloidal suspension to produce an impregnated support; and (iii) calcining the impregnated support to produce the photocatalyst compound. The photocatalyst compound is useful, in the treatment of a fluid containing an organic pollutant.Type: GrantFiled: August 29, 1997Date of Patent: November 9, 1999Assignee: University Technologies International Inc.Inventors: Cooper H. Langford, Yiming Xu
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Patent number: 5731471Abstract: A process for the preparation of purified 2,3-pentanedione from lactic compound which is lactic acid or a lactic acid ester. The process uses elevated temperatures between about 250.degree. to 370.degree. C. for heating a support (catalyst 16) and pressures between about 0.1 to 10 MPa to produce the 2,3-pentanedione in a reaction mixture. The lactic compound is converted primarily to 2,3-pentanedione, acrylic acid, and acetaldehyde at the elevated temperatures over the catalyst. The 2,3-pentanedione is preferably separated from the reaction mixture as an azeotrope with water at about 80.degree. to 90.degree. C. and then cooled to separate the 2,3-pentanedione from the water.Type: GrantFiled: October 25, 1995Date of Patent: March 24, 1998Assignee: Board of Trustees operating Michigan State UniversityInventors: Dennis J. Miller, James E. Jackson, Robert H. Langford, Garry C. Gunter, Man Sang Tam, Prashant B. Kokitkar
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Patent number: 5686372Abstract: A photocatalyst compound comprising a silica-based support material having bound thereto a photocatalyst selected from the group consisting of TiO.sub.2, WO.sub.3 and mixtures thereof, the photocatalyst compound having been derivatized by reaction with an alcohol compound. The process for producing the photocatalyst compound comprises the steps of: (i) contacting a silica-based support material having bound thereto a photocatalyst selected from the group consisting of TiO.sub.2, WO.sub.Type: GrantFiled: May 26, 1995Date of Patent: November 11, 1997Assignee: University Technologies International Inc.Inventors: Cooper H. Langford, Giuseppe P. Lepore, Lalchan Persaud
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Patent number: 5578275Abstract: A sampling system with a remotely operable, in-line sampler with continuous low of sample flush water is described. The device is used in the production of friction sensitive liquid nitrate esters, particularly nitroglycerin and diethylene glycol dinitrate.Type: GrantFiled: February 16, 1995Date of Patent: November 26, 1996Assignee: The United States of America as represented by the Secretary of the ArmyInventors: Steven J. Rosenberg, Shpend Ismaili, Eldon K. Hurley, Thomas H. Langford
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Patent number: 5447764Abstract: An insulated retainer (10) for a beverage container. The retainer (10) is comprised of a cylindrical sleeve (12) with an open top (16) and open bottom (18), the bottom (18) having a flexible base (14), thereby providing stability to the beverage container.Type: GrantFiled: August 26, 1992Date of Patent: September 5, 1995Inventor: Mark H. Langford
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Patent number: 5118429Abstract: There is disclosed a process for destroying halogenated hydrocarbons such as PCBs and PCBs in PCB containing fluids (e.g., Askarel) and oils (e.g., paraffin oil, transformer oil, etc.) at ambient temperature. The process comprises reacting halogenated hydrocarbons, such as PCB containing fluids or oils with a solid oxidant in the presence of a concentrated acid. Preferably, the solid oxidant is potassium permanganate and the concentrated acid is sulfuric acid. Destruction efficiency is as high as 99.95%.Type: GrantFiled: October 29, 1990Date of Patent: June 2, 1992Assignee: Concordia UniversityInventors: Perry D. Anderson, Bhuvan C. Pant, Zhendi Wang, Cooper H. Langford, Prasad Aysola
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Patent number: 4980039Abstract: This is disclosed a process for the decomposition of halogenated hydrocarbons including polychlorinated biphenyls (PCB) and chlorinated pesticides, as DDT and DDE. The process comprises microwave-mediated wet-ashing of the halogenated hydrocarbons(s) in controlled conditions to avoid an emission of noxious fumes from the reaction mixture. Preferably, the wet-ashing reagent is a 1:1 mixture of nitric acid and sulfuric acid.Type: GrantFiled: September 13, 1989Date of Patent: December 25, 1990Assignee: Canadian Patents & Development Ltd.Inventors: Prasad Aysola, Perry D. Anderson, Cooper H. Langford
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Patent number: 4806514Abstract: A composite photocatalyst for refractory waste treatment comprising particles of a wide band gap semiconductor material selected from the group consisting of titanium oxide, cadmium sulfide and cadmium selenide, the particles being coated with a polymer film capable of absorbing a refractory waste substrate to be treated and comprising a pyridine-containing polymer and a divalent metal porphyrin or phthalocyanine-based dye. The dye is molecularly dispersed throughout the film and chemically bonded to the pyridine-containing polymer. Upon mixing of the photocatalyst with the refractory waste substrate and irradiation with light having a wavelength of about 300 to about 400 nm, the photocalyst of the invention generates in the polymer film thereof reactive species which are sufficiently oxidizing to degrade the refractory waste substrate absorbed in the polymer film.Type: GrantFiled: September 30, 1987Date of Patent: February 21, 1989Assignee: Canadian Patents and Development Limited -Societe Canadienne des Brevets et D'Exploitation LimiteeInventors: Cooper H. Langford, Mark K. S. Mak, Andrew M. Crouch
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Patent number: 4184047Abstract: An audio signal processing system for enhancing audio signals such as music by providing reverberation, generation of stereophonic or quadraphonic effects, chorusing, flanging, pitch change, vibrato and various combinations of these effects. An audio signal is passed through a compressor, to increase its signal-to-noise ratio,and then through a delay circuit. The delayed audio signal is passed through an expandor to restore the original input level. Preferably, before being applied to the compressor the audio signal passes through a pre-emphasis circuit and, after passing through the expandor, through a de-emphasis circuit, thereby emphasizing desired frequencies. In some embodiments, the processed output signal is blended with the received audio signal to provide a blended audio signal, and in some embodiments the processed audio signal is fed back to the system input for recirculation, providing reverberation. The delay circuit is preferably an analog shift register.Type: GrantFiled: June 22, 1977Date of Patent: January 15, 1980Inventor: Robert H. Langford