Patents by Inventor Keith A. Roberts

Keith A. Roberts 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: 9114225
    Abstract: A membrane oxygen humidifier that is associated with a gas source for increasing humidity of the gas. The membrane oxygen humidifier includes an enclosure, a membrane unit and a humidification source. The enclosure includes an inlet port and an outlet port. The membrane unit is removably mounted in the enclosure to extend between the inlet port and the outlet port. The humidification source in communication with the enclosure and the membrane unit.
    Type: Grant
    Filed: November 13, 2012
    Date of Patent: August 25, 2015
    Assignee: Corad Healthcare, Inc.
    Inventors: Keith A. Roberts, Jeff Helget
  • Patent number: 9061087
    Abstract: A method of making a wound dressing comprises dissolving at least one hemostatic agent in at least one solvent to form a solution. The method continues by freeze drying the solution to form a sponge. The method further comprises compressing the sponge, wherein the sponge is subjected to a vapor above ambient temperature prior to or during the compression.
    Type: Grant
    Filed: February 23, 2009
    Date of Patent: June 23, 2015
    Assignee: Hemostasis, LLC
    Inventors: Keith A. Roberts, Majid Zia
  • Publication number: 20140171883
    Abstract: One aspect of the invention is a method of treating a wound to clot blood. A sponge material is applied to the wound. The sponge comprises a starch having hemostatic properties and at least one binding agent. The sponge may further comprise a porous, flexible material.
    Type: Application
    Filed: January 6, 2014
    Publication date: June 19, 2014
    Inventors: Keith A. Roberts, John Henry Burban, Majid Zia, Michael R. Spearman
  • Publication number: 20140058328
    Abstract: One aspect of the invention is a method to vent gas from a body cavity during an endoscopic procedure. A body cavity is in fluid communication with an exhaust gas inlet of a vacuum break device. The vacuum break device has a chamber in fluid communication with both the inlet and an outlet. The chamber may comprise one or more openings in fluid communication with the atmosphere. A conduit in fluid communication with the exhaust gas outlet may be connected directly or indirectly to a suction source. The suction source may be activated.
    Type: Application
    Filed: October 31, 2013
    Publication date: February 27, 2014
    Inventors: Duane Earl Lloyd, Keith A. Roberts
  • Patent number: 8623842
    Abstract: One aspect of the invention is a method of treating a wound to clot blood. A sponge material is applied to the wound. The sponge comprises a starch having hemostatic properties and at least one binding agent. The sponge may further comprise a porous, flexible material.
    Type: Grant
    Filed: September 26, 2007
    Date of Patent: January 7, 2014
    Assignee: Hemostasis, LLC
    Inventors: Keith A. Roberts, John Henry Burban, Majid Zia, Michael R. Spearman
  • Patent number: 8608715
    Abstract: One aspect of the invention is a method to vent gas from a body cavity during an endoscopic procedure. A body cavity is in fluid communication with an exhaust gas inlet of a vacuum break device. The vacuum break device has a chamber in fluid communication with both the inlet and an outlet. The chamber may comprise one or more openings in fluid communication with the atmosphere. A conduit in fluid communication with the exhaust gas outlet may be connected directly or indirectly to a suction source. The suction source may be activated.
    Type: Grant
    Filed: April 8, 2013
    Date of Patent: December 17, 2013
    Assignee: Lexion Medical, LLC
    Inventors: Keith A. Roberts, John Henry Burban, Duane E. Lloyd
  • Patent number: 8585646
    Abstract: One aspect of the invention is a method to vent gas from a body cavity during an endoscopic procedure. A body cavity is in fluid communication with an exhaust gas inlet of a vacuum break device. The vacuum break device has a chamber in fluid communication with both the inlet and an outlet. The chamber may comprise one or more openings in fluid communication with the atmosphere. A conduit in fluid communication with the exhaust gas outlet may be connected directly or indirectly to a suction source. The suction source may be activated.
    Type: Grant
    Filed: March 3, 2008
    Date of Patent: November 19, 2013
    Assignee: Lexion Medical, LLC
    Inventors: Duane Earl Lloyd, Keith A. Roberts
  • Publication number: 20130226153
    Abstract: One aspect of the invention is a method to vent gas from a body cavity during an endoscopic procedure. A body cavity is in fluid communication with an exhaust gas inlet of a vacuum break device. The vacuum break device has a chamber in fluid communication with both the inlet and an outlet. The chamber may comprise one or more openings in fluid communication with the atmosphere. A conduit in fluid communication with the exhaust gas outlet may be connected directly or indirectly to a suction source. The suction source may be activated.
    Type: Application
    Filed: April 8, 2013
    Publication date: August 29, 2013
    Inventors: Keith A. Roberts, John Henry Burban, Duane E. Lloyd
  • Patent number: 8414550
    Abstract: One aspect of the invention is a method to vent gas from a body cavity during an endoscopic procedure. A body cavity is in fluid communication with an exhaust gas inlet of a vacuum break device. The vacuum break device has a chamber in fluid communication with both the inlet and an outlet. The chamber may comprise one or more openings in fluid communication with the atmosphere. A conduit in fluid communication with the exhaust gas outlet may be connected directly or indirectly to a suction source. The suction source may be activated.
    Type: Grant
    Filed: April 11, 2007
    Date of Patent: April 9, 2013
    Assignee: Lexion Medical, LLC
    Inventors: Keith A. Roberts, John Henry Burban, Duane E. Lloyd
  • Patent number: 8307825
    Abstract: A membrane oxygen humidifier including at least one water permeable membrane, an enclosure having an air inlet port and an air outlet port and a fan. The at least one water permeable membrane extends through the enclosure. The fan is positioned proximate at least one of the air inlet port and the air outlet port.
    Type: Grant
    Filed: March 11, 2009
    Date of Patent: November 13, 2012
    Assignee: Corad Healthcare, Inc.
    Inventor: Keith A. Roberts
  • Patent number: 8307826
    Abstract: A method of providing a source of breathable humidified oxygen gas. A membrane oxygen humidifier is provided that includes at least one water permeable membrane and an enclosure. The at least one water permeable membrane has a first membrane side and a second membrane side that are in communication through the water permeable membrane. The enclosure extends over the second membrane side and wherein the enclosure has an air inlet port and an air outlet port. A first gas containing oxygen is directed past the first membrane side. The second gas is directed past the second membrane side with a fan. The first gas is humidified by transferring moisture through the at least one water permeable membrane from the second gas to the first gas.
    Type: Grant
    Filed: August 23, 2012
    Date of Patent: November 13, 2012
    Assignee: Corad Healthcare, Inc.
    Inventor: Keith A. Roberts
  • Publication number: 20110052663
    Abstract: In one embodiment, a method of making a wound dressing comprises dissolving at least one hemostatic agent in at least one solvent to form a solution. The method continues by freeze drying the solution to form a sponge. The method further comprises including an enzyme in the sponge that enables a human body to readily degrade the hemostatic agent.
    Type: Application
    Filed: August 9, 2010
    Publication date: March 3, 2011
    Applicant: Hemostasis, LLC
    Inventor: Keith A. Roberts
  • Publication number: 20090260253
    Abstract: An membrane drying system comprising: a chamber, a vacuum pump, a sweep gas source, and a membrane device, wherein the membrane device comprises a membrane, a first inlet in fluid communication with the chamber and the membrane, a first outlet in fluid communication with the membrane and the vacuum pump, a second inlet in fluid communication with the sweep gas source and the membrane, and a second outlet in fluid communication with the membrane.
    Type: Application
    Filed: April 17, 2009
    Publication date: October 22, 2009
    Inventors: Keith A. Roberts, Ryan Hoitink, Michael Spearman
  • Publication number: 20090226391
    Abstract: A method of making a wound dressing comprises dissolving at least one hemostatic agent in at least one solvent to form a solution. The method continues by freeze drying the solution to form a sponge. The method further comprises compressing the sponge, wherein the sponge is subjected to a vapor above ambient temperature prior to or during the compression.
    Type: Application
    Filed: February 23, 2009
    Publication date: September 10, 2009
    Applicant: Hemostasis, LLC
    Inventors: Keith A. Roberts, Majid Zia
  • Publication number: 20090221963
    Abstract: One aspect of the invention is a method to vent gas from a body cavity during an endoscopic procedure. A body cavity is in fluid communication with an exhaust gas inlet of a vacuum break device. The vacuum break device has a chamber in fluid communication with both the inlet and an outlet. The chamber may comprise one or more openings in fluid communication with the atmosphere. A conduit in fluid communication with the exhaust gas outlet may be connected directly or indirectly to a suction source. The suction source may be activated.
    Type: Application
    Filed: March 3, 2008
    Publication date: September 3, 2009
    Applicant: Hemostasis, LLC
    Inventors: Duane Earl Lloyd, Keith A. Roberts
  • Publication number: 20080076722
    Abstract: One aspect of the invention is a method of treating a wound to clot blood. A sponge material is applied to the wound. The sponge comprises a starch having hemostatic properties and at least one binding agent. The sponge may further comprise a porous, flexible material.
    Type: Application
    Filed: September 26, 2007
    Publication date: March 27, 2008
    Applicant: Hemostasis, LLC
    Inventors: Keith A. Roberts, John Henry Burban, Majid Zia, Michael R. Spearman
  • Patent number: 6585808
    Abstract: A membrane air drier utilizes an orifice to serve as the sweep air inlet with a sweep diffuser placed a short distance from the orifice. Preferably, an open channel extends from the product end of the membrane module on the shell side of the fibers with a porous diffuser at one end of the open channel and an orifice at the other end of the channel.
    Type: Grant
    Filed: December 6, 2001
    Date of Patent: July 1, 2003
    Assignee: Porous Media Corporation
    Inventors: John H. Burban, Robert O. Crowder, Michael R. Spearman, Keith A. Roberts
  • Publication number: 20020069758
    Abstract: A membrane air drier utilizes an orifice to serve as the sweep air inlet with a sweep diffuser placed a short distance from the orifice. Preferably, an open channel extends from the product end of the membrane module on the shell side of the fibers with a porous diffuser at one end of the open channel and an orifice at the other end of the channel.
    Type: Application
    Filed: December 6, 2001
    Publication date: June 13, 2002
    Inventors: John H. Burban, Robert O. Crowder, Michael R. Spearman, Keith A. Roberts
  • Patent number: 6123076
    Abstract: A filter is disclosed having a layer of electret filter media or triboelectric filter media immediately adjacent or in intimate contact with one, or both sides, of a layer of hydrophobic media. Such filter is placed in communication with the upstream and/or downstream side of a mechanical electronic or electrostatic filter to solve problems present in the prior art. Additionally, a medical ventilator filter and system using such a filter is disclosed.
    Type: Grant
    Filed: May 8, 1998
    Date of Patent: September 26, 2000
    Assignee: Porous Media Corporation
    Inventors: Keith A. Roberts, Michael R. Spearman, John H. Burban, Majid Zia, Rochelle M. Mickschl
  • Patent number: 6010458
    Abstract: The present invention is a spirometer mouthpiece assembly having a bag or sock filter medium. A support mechanism is incorporated into the assembly to prevent the filter medium from becoming dislodged during use. This not only protects the user of the spirometer, it also helps prevent contamination.The present invention consists of a spirometer mouthpiece having an interior conduit, a filter medium having an exterior and interior. The filter medium also has a rim portion and bag portion. Lastly, the device has a rigid support mechanism. The filter medium is attached to the interior conduit of the mouthpiece. The support mechanism may be attached to the filter medium or the interior conduit of the mouthpiece. If the support mechanism is attached to the mouthpiece, the filter medium is disposed adjacent the support mechanism.
    Type: Grant
    Filed: April 29, 1998
    Date of Patent: January 4, 2000
    Assignee: Porous Media Corporation
    Inventor: Keith A. Roberts