Patents by Inventor Donald A. Randolph
Donald A. Randolph 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: 9444244Abstract: The current invention is an automatic AC power interruption system built into a portable apparatus or integrated into electrical systems and appliance control circuitry. Power is interrupted in potentially hazardous conditions, for example, when a T3 smoke detector alarm signal is detected. Alternatively, a portable device may be plugged into a power outlet having a GFCI breaker and, when a hazard alarm condition is detected, trip off power to the outlet. Signal-activated circuit interrupters (SACIs) may be integrated into appliance control circuitry and interrupt power to a problematic device when a hazard alarm condition is detected. In addition to fire prevention, other hazard alarm conditions may include alarms indicating toxic fumes, motor overload, natural gas, radon, or carbon monoxide. Interconnected networks of signal-activated circuit interrupters are also disclosed.Type: GrantFiled: November 25, 2014Date of Patent: September 13, 2016Inventors: Donald Randolph Hooper, Danial L. Aalberg
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Patent number: 9352477Abstract: Disclosed in various example embodiments is a cake cutter and server apparatus, system, and methods of use adapted to neatly cut differently-shaped cakes into regularly-sized slices and serve them without ruining the appearance of the cake or making a mess. Provided in various example embodiments are first and second longitudinally-extending members connected with a plurality of spaced-apart flexible lines that may be coiled around one or more of the members prior to use. One or more of the longitudinally-extending members may be readily disassembled and a portion thereof converted into a handle of a server that may be provided therewith in a kit that can be inexpensively manufactured, is compact, easy-to-use, and could be provided within typical cake boxes.Type: GrantFiled: April 25, 2015Date of Patent: May 31, 2016Assignee: DJBW, LLCInventors: Joshua James Warnick, Donald Randolph Byrd
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Publication number: 20150077243Abstract: The current invention is an automatic AC power interruption system built into a portable apparatus or integrated into electrical systems and appliance control circuitry. Power is interrupted in potentially hazardous conditions, for example, when a T3 smoke detector alarm signal is detected. Alternatively, a portable device may be plugged into a power outlet having a GFCI breaker and, when a hazard alarm condition is detected, trip off power to the outlet. Signal-activated circuit interrupters (SACIs) may be integrated into appliance control circuitry and interrupt power to a problematic device when a hazard alarm condition is detected. In addition to fire prevention, other hazard alarm conditions may include alarms indicating toxic fumes, motor overload, natural gas, radon, or carbon monoxide. Interconnected networks of signal-activated circuit interrupters are also disclosed.Type: ApplicationFiled: November 25, 2014Publication date: March 19, 2015Inventors: Donald Randolph Hooper, Danial L. Aalberg
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Publication number: 20140098445Abstract: The current invention is an automatic AC power interruption system built into a portable power strip or a portable casing or integrated into an appliances control circuitry. The invention monitors the environment for hazard alarms, for example, a T3 signal smoke detector alarm, and responds by tripping open the power supply circuit to the power strip's receptacles and thus interrupts AC power to the protected appliances the user has chosen to plug into them. One alternate form of the invention uses a portable casing that can be plugged into a power receptacle and, when a hazard alarm is detected, trip off the nearest GFCI. Other alternate forms of the invention are integrated within an individual appliance's control circuitry and may interrupt power using a built-in switch or by tripping off the nearest GFCI device.Type: ApplicationFiled: August 17, 2012Publication date: April 10, 2014Inventor: Donald Randolph Hooper
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Publication number: 20090089852Abstract: Multimedia data representative of a multimedia channel is received at a set top box (STB) device located at a viewer's premises from a service provider. The multimedia data is processed at the STB device for presentation of the multimedia channel at a display device located at the viewer's premises. The STB device identifies an artifact during the processing of the multimedia data that is expected to affect the presentation of the multimedia channel and generates an error indicator based on the artifact. The STB device provides the error indicator for reception by the service provider. The error indicator then may be used by the service provider to identify and correct any related errors or malfunctions.Type: ApplicationFiled: October 1, 2007Publication date: April 2, 2009Applicant: AT&T KNOWLEDGE VENTURES, LPInventors: Donald Randolph, Bradley C. Griner, Jeffrey W. Zimmerman
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Patent number: 7371408Abstract: A bone graft substitute composition comprising calcium sulfate; a mixing solution selected from the group consisting of sterile water, sodium chloride, phosphate buffered saline, potassium chloride, and sodium sulfate; and a plasticizing substance selected from the group consisting of carboxymethylcellulose, polyvinyl alcohol, methycellulose, and hydroxypropyl methylcellulose.Type: GrantFiled: June 7, 1999Date of Patent: May 13, 2008Assignee: Wright Medical Technology, Inc.Inventors: Donald W. Petersen, Warren O. Haggard, Donald A. Randolph, Cary P. Hagan
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Publication number: 20020071827Abstract: A bone graft substitute composition can include essentially of calcium sulfate, a mixing solution, and a plasticizing substance. A bone graft substitute composition can include calcium sulfate, demineralized bone matrix, cancellous bone, a plasticizing substance, and a mixing solution.Type: ApplicationFiled: July 26, 2001Publication date: June 13, 2002Inventors: Donald W. Petersen, Kelly Coupe Richelsoph, Warren Oliver Haggard, Cary P. Hagan, Donald A. Randolph
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Patent number: 6030636Abstract: This invention relates to the controlled release of calcium sulfate as well as to the controlled release of an additive to a calcium sulfate matrix such as medicaments or pesticides. The controlled release is achieved by a pellet comprising calcium sulfate. The pellet is prepared by the process comprising mixing powder consisting essentially of alpha-calcium sulfate hemihydrate, a solution comprising water, and, optionally, an additive and a powder consisting essentially of beta-calcium sulfate hemihydrate to form a mixture, and forming said mixture into a pellet, wherein said alpha-calcium sulfate hemihydrate and beta-calcium sulfate hemihydrate powders have specified properties such as BET surface areas, densities, mean particle sizes, and purities. The dissolution rate of the calcium sulfate pellet is controlled by varying the weight ratio of the beta-calcium sulfate hemihydrate powder to the alpha-calcium sulfate hemihydrate powder from 0 to about 3.Type: GrantFiled: September 2, 1998Date of Patent: February 29, 2000Assignee: Wright Medical Technology IncorporatedInventors: Donald A. Randolph, Jodi L. Negri, Timothy R. Devine, Steven Gitelis
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Patent number: 5807567Abstract: This invention relates to the controlled release of calcium sulfate as well as to the controlled release of an additive to a calcium sulfate matrix such as medicaments or pesticides. The controlled release is achieved by a pellet comprising calcium sulfate. The pellet is prepared by the process comprising mixing powder consisting essentially of alpha-calcium sulfate hemihydrate, a solution comprising water, and, optionally, an additive and a powder consisting essentially of beta-calcium sulfate hemihydrate to form a mixture, and forming said mixture into a pellet, wherein said alpha-calcium sulfate hemihydrate and beta-calcium sulfate hemihydrate powders have specified properties such as BET surface areas, densities, mean particle sizes, and purities. The dissolution rate of the calcium sulfate pellet is controlled by varying the weight ratio of the beta-calcium sulfate hemihydrate powder to the alpha-calcium sulfate hemihydrate powder from 0 to about 3.Type: GrantFiled: December 11, 1996Date of Patent: September 15, 1998Assignee: Wright Medical Technology, IncorporatedInventors: Donald A. Randolph, Jodi L. Negri, Timothy R. Devine, Steven Gitelis
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Patent number: 5614206Abstract: This invention relates to the controlled release of calcium sulfate as well as to the controlled release of an additive to a calcium sulfate matrix such as medicaments or pesticides. The controlled release is achieved by a pellet comprising calcium sulfate. The pellet is prepared by the process comprising mixing powder consisting essentially of alpha-calcium sulfate hemihydrate, a solution comprising water, and, optionally, an additive and a powder consisting essentially of beta-calcium sulfate hemihydrate to form a mixture, and forming said mixture into a pellet, wherein said alpha-calcium sulfate hemihydrate and beta-calcium sulfate hemihydrate powders have specified properties such as BET surface areas, densities, mean particle sizes, and purifies. The dissolution rate of the calcium sulfate pellet is controlled by varying the weight ratio of the beta-calcium sulfate hemihydrate powder to the alpha-calcium sulfate hemihydrate powder from 0 to about 3.Type: GrantFiled: March 7, 1995Date of Patent: March 25, 1997Assignee: Wright Medical Technology, Inc.Inventors: Donald A. Randolph, Jodi L. Negri, Timothy R. Devine, Steven Gitelis
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Patent number: 4552683Abstract: A process for adsorbing sulfur dioxide from a gas comprising contacting a gas containing SO.sub.2, such as a flue gas, with about stoichiometric amounts of a specially prepared calcium oxide so that substantially all of the sulfur dioxide content is reacted throughout the calcium oxide particle to form a calcium sulfate reaction product. The useful calcium oxide particles comprise a highly voided skeletal structure of very large surface area and large pore volume with numerous macro pores. Such particles are obtained by flash calcining sand-size grains of calcium carbonate, such as aragonite, calcite or dolomite.Type: GrantFiled: September 14, 1983Date of Patent: November 12, 1985Assignee: United States Gypsum CompanyInventors: Byron E. Powell, Virendar S. Bakhshi, Donald A. Randolph
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Patent number: 4520073Abstract: Mineral filler materials are provided with improved hydrophobic coatings by pressure coating of porous minerals using steam as a carrier for the coating material. Thereby more complete sealing of fissures and cracks in the porous filler materials' surface is provided, resulting in very water-resistant coated particles useful in filling polymeric substrates such as paints, plastics and joint compounds.Type: GrantFiled: December 23, 1983Date of Patent: May 28, 1985Assignee: USG CorporationInventors: Donald A. Randolph, Kenneth R. Watkins
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Patent number: 4424197Abstract: A process for adsorbing sulfur dioxide from a gas comprising contacting a gas containing SO.sub.2, such as a flue gas, with about stoichiometric amounts of a specially prepared calcium oxide so that substantially all of the sulfur dioxide content is reacted throughout the calcium oxide particle to form a calcium sulfate reaction product. The useful calcium oxide particles comprise a highly voided skeletal structure of very large surface area and large pore volume with numerous macro pores. Such particles are obtained by flash calcining sand-size grains of calcium carbonate, such as aragonite, calcite or dolomite.Type: GrantFiled: September 29, 1982Date of Patent: January 3, 1984Assignee: United States Gypsum CompanyInventors: Byron E. Powell, Virendar S. Bakhshi, Donald A. Randolph