Patents by Inventor Donald Stafford

Donald Stafford 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).

  • Publication number: 20200168347
    Abstract: A low-power platform senses an environment around the platform. The platform includes sensor interfaces, a multiplexer, a dual port memory, a processor, and a radio. The similar sensor interfaces are for attaching environmental sensors. The multiplexer combines the environmental data from the attached environmental sensors into a single stream. The dual port memory temporarily stores the stream. The processor intermittently retrieves the stream from the dual port memory. The radio forwards the stream toward a central system. Each interface includes a mechanical interlock for attaching a respective environmental sensor and an electrical interlock for detecting whether the mechanical interlock engages the environmental sensor. Each interface transfers peripheral power and environmental data for the respective environmental sensor.
    Type: Application
    Filed: November 26, 2019
    Publication date: May 28, 2020
    Inventors: Laura Catherine Tolliver, Kevin Paul Votapka, Scott Christopher Batson, Bruce James Billian, Tony Donald Stafford, Kaitlyn Rebecca Bub, Hunter Joseph Smith, Lucas Duane Powell, Wesley Jamel Jones, Brandon Scott Lood, Joshua James Murphy, Kevin Joseph Pinzhoffer, Christopher Stephen Williams, Peyton Cavaroc, Alicia Hilton
  • Patent number: 8488276
    Abstract: A perpendicular magnetic recording (PMR) media including a non-magnetic or superparamagnetic grain isolation magnetic anisotropy layer (GIMAL) to provide a template for initially well-isolated small grain microstructure as well as improvement of Ku in core grains of a magnetic recording layer. The GIMAL composition may be adjusted to have lattice parameters similar to a bottom magnetic recording layer and to provide a buffer for reducing interface strains caused by lattice mismatch between the bottom magnetic recording layer and an underlying layer.
    Type: Grant
    Filed: September 30, 2008
    Date of Patent: July 16, 2013
    Assignee: WD Media, LLC
    Inventors: Hong-Sik Jung, Donald Stafford, B. Ramamurthy Acharya, Sudhir S. Malhotra, Gerardo A. Bertero
  • Patent number: 8394243
    Abstract: Method of incorporating atomic oxygen into a magnetic recording layer by sputtering a target containing an oxide of cobalt. The oxide of cobalt may be sputtered to provide a readily dissociable source of oxygen which may increase the concentration of free cobalt atoms (Co) in the magnetic recording layer and also increase oxide content in the magnetic recording layer.
    Type: Grant
    Filed: September 30, 2008
    Date of Patent: March 12, 2013
    Assignee: WD Media, Inc.
    Inventors: Hong-Sik Jung, Donald Stafford, B. Ramamurthy Acharya, Sudhir S. Malhotra, Gerardo A. Bertero
  • Publication number: 20070237552
    Abstract: A doctor blade (10) having a steel rod (11) attached to a stamped bracket (20) provides a radiused surface for contacting a developer roll (12). The doctor blade (10 ) includes a bracket member (20) having a mounting end (42), a doctoring end (44) and a bent portion (14) connecting the mounting end (42) to the doctoring end (44). The rod (11) is coupled to the bracket member (20) near the bent portion (14) and arranged to contact a developer roll (12) for precise toner metering.
    Type: Application
    Filed: April 6, 2006
    Publication date: October 11, 2007
    Inventors: Robert McAlpine, Donald Stafford, Gregory Tigges
  • Publication number: 20070054072
    Abstract: The present invention relates to packaging materials that may be used for components in an image forming apparatus. The packaging material may include polymeric fiber which may be in the form of a non-woven, woven or knit fabric. The fiber may contain less than 5.0% of compounds having molecular weights of equal to or less than about 2500. The packaging material may also absorb developing agent.
    Type: Application
    Filed: September 8, 2005
    Publication date: March 8, 2007
    Inventors: Peter Bracken, James Dickerson, Mark Foster, Johnny Massie, Robert McAlpine, Donald Stafford, Gregory Tigges
  • Publication number: 20070048050
    Abstract: An apparatus and method for the transport and/or storage of developing agent in an image forming apparatus. A cartridge may be employed having a reservoir for developing agent and a component, such as a drum, which may include an interior region capable of storing developing agent. A transport device may be included that is capable of transporting developing agent between the reservoir and a location in the image forming apparatus such as the drum interior.
    Type: Application
    Filed: August 30, 2005
    Publication date: March 1, 2007
    Inventors: Alfred Fahmy, Robert McAlpine, Franklin Palumbo, William Smith, Donald Stafford, Gregory Tigges
  • Patent number: 7179549
    Abstract: A magnetic recording medium constructed in accordance with the invention comprises a substrate, first, second and third underlayers formed over the substrate, and a magnetic data recording layer formed over the underlayers. The underlayers typically have a bcc crystal structure, and comprise Cr or Cr alloys. The magnetic data recording layer has a hcp crystal structure and comprises a Co alloy. The second underlayer typically comprises a material such as B, which tends to reduce the crystal size of the second underlayer and the layers deposited thereon, and also to increase crystal spacing.
    Type: Grant
    Filed: January 21, 2004
    Date of Patent: February 20, 2007
    Assignee: Komag, Inc.
    Inventors: Sudhir S. Malhotra, Gerardo Bertero, Ching Tsoi, Donald Stafford
  • Publication number: 20060188302
    Abstract: A conveyor mechanism for moving waste toner within an interior of a waste toner reservoir. The conveyor mechanism has a first end positioned in proximity to an inlet into the waste toner reservoir, and a second end positioned vertically above the first end. The conveyor mechanism operates to move the toner from a lower position within the waste toner reservoir to the vertically elevated position. The conveyor device may allow for the capacity of the waste toner reservoir to be more fully utilized. In use, the conveyor device is activated and waste toner is moved into the upper reaches of the waste toner reservoir.
    Type: Application
    Filed: February 22, 2005
    Publication date: August 24, 2006
    Inventors: Donald Stafford, Robert McAlpine, Franklin Palumbo, Alfred Fahmy, Gregory Tigges, William Smith
  • Publication number: 20060182475
    Abstract: The present invention relates generally to image forming equipment, e.g. a laser printer of the type which includes a photoconductive (PC) drum and an associated charge roller. The invention is disclosed in exemplary embodiment as a laser printer incorporating a cleaner element with an electrical potential to sufficiently charge contamination particles on the PC drum to electrically repel from a charged surface, such as the charge roller.
    Type: Application
    Filed: February 11, 2005
    Publication date: August 17, 2006
    Inventors: Bhaskar Gopalanarayanan, Robert McAlpine, Jamie Piotrowski, Donald Stafford
  • Patent number: 7070870
    Abstract: A magnetic recording medium includes a substrate, an underlayer, a lower magnetic layer formed on the underlayer, an intermediate layer, and an upper magnetic layer formed on the intermediate layer. The intermediate layer is typically Ru, and promotes anti ferromagnetic coupling between the upper and lower magnetic layers. The upper and lower magnetic layers are typically Co alloys. The lower magnetic layer has a high saturation magnetization Ms to promote high exchange coupling between the upper and lower magnetic layers. The dynamic coercivity of the lower magnetic layer is lower than the exchange field to ensure rapid switching of the lower magnetic layer.
    Type: Grant
    Filed: February 1, 2005
    Date of Patent: July 4, 2006
    Assignee: Komag, Inc.
    Inventors: Gerardo Bertero, Sudhir Malhotra, David Wachenschwanz, Zhengsheng Shan, Donald Stafford
  • Publication number: 20060104676
    Abstract: There is provided a system and mechanism for substantially reducing or substantially eliminating vibration or noise of a doctor blade of an image forming apparatus during operation. The system and mechanism provided includes at least one contact in communication with a doctor blade surface, e.g., a front surface, to substantially reduce or substantially eliminate vibration and/or noise associated with a doctor blade during image forming.
    Type: Application
    Filed: November 17, 2004
    Publication date: May 18, 2006
    Inventors: James Dickerson, Robert Hackett, Donald Kral, Donald Stafford
  • Publication number: 20060086441
    Abstract: The present invention relates to particle reinforced noble metal matrix composites and a method of making the same. The composites include a noble metal such as silver, gold, and alloys thereof, as a base or matrix, and a particle reinforced filler material, such as a carbide. A pressureless infrared heating, or superheating, process is used to produce the particle reinforced noble metal matrix composites thereby providing a composite with at least sufficient hardness, i.e. wear resistance, and/or low resistivity. The composites may be used in the jewelry industry, such as for making watches, rings, and other jewelry, and/or in the power, automobile, and aircraft industries, such as for making electrical contact materials.
    Type: Application
    Filed: October 27, 2004
    Publication date: April 27, 2006
    Inventors: Ray Lin, Donald Stafford
  • Publication number: 20050220500
    Abstract: A doctor blade for use with an imaging apparatus includes an elongated member, and a metering surface formed on a portion of the elongated member. The metering surface has surface features, which are modified by buffing the metering surface.
    Type: Application
    Filed: April 1, 2004
    Publication date: October 6, 2005
    Inventors: Martin DiGirolamo, David MacMillan, Jody McCoy, Robert Soto, Donald Stafford
  • Publication number: 20050158588
    Abstract: A magnetic recording medium constructed in accordance with the invention comprises a substrate, first, second and third underlayers formed over the substrate, and a magnetic data recording layer formed over the underlayers. The underlayers typically have a bcc crystal structure, and comprise Cr or Cr alloys. The magnetic data recording layer has a hcp crystal structure and comprises a Co alloy. The second underlayer typically comprises a material such as B, which tends to reduce the crystal size of the second underlayer and the layers deposited thereon, and also to increase crystal spacing.
    Type: Application
    Filed: January 21, 2004
    Publication date: July 21, 2005
    Inventors: Sudhir Malhotra, Gerardo Bertero, Ching Tsoi, Donald Stafford
  • Publication number: 20050129984
    Abstract: A magnetic recording medium includes a substrate, an underlayer, a lower magnetic layer formed on the underlayer, an intermediate layer, and an upper magnetic layer formed on the intermediate layer. The intermediate layer is typically Ru, and promotes anti ferromagnetic coupling between the upper and lower magnetic layers. The upper and lower magnetic layers are typically Co alloys. The lower magnetic layer has a high saturation magnetization Ms to promote high exchange coupling between the upper and lower magnetic layers. The dynamic coercivity of the lower magnetic layer is lower than the exchange field to ensure rapid switching of the lower magnetic layer.
    Type: Application
    Filed: February 1, 2005
    Publication date: June 16, 2005
    Inventors: Gerardo Bertero, Sudhir Malhotra, David Wachenschwanz, Zhengsheng Shan, Donald Stafford
  • Patent number: 6899959
    Abstract: A magnetic recording medium includes a substrate, an underlayer, a lower magnetic layer formed on the underlayer, an intermediate layer, and an upper magnetic layer formed on the intermediate layer. The intermediate layer is typically Ru, and promotes antiferromagnetic coupling between the upper and lower magnetic layers. The upper and lower magnetic layers are typically Co alloys. The lower magnetic layer has a high saturation magnetization Ms to promote high exchange coupling between the upper and lower magnetic layers. The dynamic coercivity of the lower magnetic layer is lower than the exchange field to ensure rapid switching of the lower magnetic layer.
    Type: Grant
    Filed: February 12, 2002
    Date of Patent: May 31, 2005
    Assignee: Komag, Inc.
    Inventors: Gerardo Bertero, Sudhir Malhotra, David Wachenschwanz, Zhengsheng Shan, Donald Stafford
  • Publication number: 20030152805
    Abstract: A magnetic recording medium includes a substrate, an underlayer, a lower magnetic layer formed on the underlayer, an intermediate layer, and an upper magnetic layer formed on the intermediate layer. The intermediate layer is typically Ru, and promotes antiferromagnetic coupling between the upper and lower magnetic layers. The upper and lower magnetic layers are typically Co alloys. The lower magnetic layer has a high saturation magnetization Ms to promote high exchange coupling between the upper and lower magnetic layers. The dynamic coercivity of the lower magnetic layer is lower than the exchange field to ensure rapid switching of the lower magnetic layer.
    Type: Application
    Filed: February 12, 2002
    Publication date: August 14, 2003
    Applicant: Komag, Inc.
    Inventors: Gerardo Bertero, Sudhir Malhotra, David Wachenschwanz, Zhengsheng Shan, Donald Stafford