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).

  • Patent number: 9444244
    Abstract: 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: Grant
    Filed: November 25, 2014
    Date of Patent: September 13, 2016
    Inventors: Donald Randolph Hooper, Danial L. Aalberg
  • Patent number: 9352477
    Abstract: 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: Grant
    Filed: April 25, 2015
    Date of Patent: May 31, 2016
    Assignee: DJBW, LLC
    Inventors: Joshua James Warnick, Donald Randolph Byrd
  • Publication number: 20150077243
    Abstract: 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: Application
    Filed: November 25, 2014
    Publication date: March 19, 2015
    Inventors: Donald Randolph Hooper, Danial L. Aalberg
  • Publication number: 20140098445
    Abstract: 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: Application
    Filed: August 17, 2012
    Publication date: April 10, 2014
    Inventor: Donald Randolph Hooper
  • Publication number: 20090089852
    Abstract: 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: Application
    Filed: October 1, 2007
    Publication date: April 2, 2009
    Applicant: AT&T KNOWLEDGE VENTURES, LP
    Inventors: Donald Randolph, Bradley C. Griner, Jeffrey W. Zimmerman
  • Patent number: 7371408
    Abstract: 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: Grant
    Filed: June 7, 1999
    Date of Patent: May 13, 2008
    Assignee: Wright Medical Technology, Inc.
    Inventors: Donald W. Petersen, Warren O. Haggard, Donald A. Randolph, Cary P. Hagan
  • Publication number: 20020071827
    Abstract: 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: Application
    Filed: July 26, 2001
    Publication date: June 13, 2002
    Inventors: Donald W. Petersen, Kelly Coupe Richelsoph, Warren Oliver Haggard, Cary P. Hagan, Donald A. Randolph
  • Patent number: 6030636
    Abstract: 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: Grant
    Filed: September 2, 1998
    Date of Patent: February 29, 2000
    Assignee: Wright Medical Technology Incorporated
    Inventors: Donald A. Randolph, Jodi L. Negri, Timothy R. Devine, Steven Gitelis
  • Patent number: 5807567
    Abstract: 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: Grant
    Filed: December 11, 1996
    Date of Patent: September 15, 1998
    Assignee: Wright Medical Technology, Incorporated
    Inventors: Donald A. Randolph, Jodi L. Negri, Timothy R. Devine, Steven Gitelis
  • Patent number: 5614206
    Abstract: 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: Grant
    Filed: March 7, 1995
    Date of Patent: March 25, 1997
    Assignee: Wright Medical Technology, Inc.
    Inventors: Donald A. Randolph, Jodi L. Negri, Timothy R. Devine, Steven Gitelis
  • Patent number: 4552683
    Abstract: 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: Grant
    Filed: September 14, 1983
    Date of Patent: November 12, 1985
    Assignee: United States Gypsum Company
    Inventors: Byron E. Powell, Virendar S. Bakhshi, Donald A. Randolph
  • Patent number: 4520073
    Abstract: 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: Grant
    Filed: December 23, 1983
    Date of Patent: May 28, 1985
    Assignee: USG Corporation
    Inventors: Donald A. Randolph, Kenneth R. Watkins
  • Patent number: 4424197
    Abstract: 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: Grant
    Filed: September 29, 1982
    Date of Patent: January 3, 1984
    Assignee: United States Gypsum Company
    Inventors: Byron E. Powell, Virendar S. Bakhshi, Donald A. Randolph