Patents by Inventor Mark Christensen
Mark Christensen 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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Publication number: 20160201462Abstract: A mechanism whereby fluid can be pumped by the addition of mechanical power to a shaft, or conversely, shaft power may be extracted from a fluid by forcing a fluid through the device, or allowing an expansion of fluid to occur, thereby producing power. The mechanism consisting of four basic components: A housing with a cylindrical interior cavity; a vane mounted concentric with the interior cavity, and having a radius such that the end of the vane touches or nearly touches the cylindrical cavity walls as the device rotates; a cylindrical hub that is smaller than the interior cavity diameter, and mounted parallel with the vane, but offset from the vane so that one side of the hub is continuously tangent, or nearly tangent with the interior of the interior housing cavity; a seal that allows the vane to move by translation and rotation relative to the cylindrical hub while preventing fluid movement between one side of the vane and the other.Type: ApplicationFiled: January 8, 2015Publication date: July 14, 2016Inventor: John Mark Christensen
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Patent number: 9295764Abstract: A corporeal drainage system and a method of draining fluid from a bodily cavity. The corporeal drainage system includes a connection tube and a fluid receptacle in fluid communication with the connection tube. The fluid receptacle creates a negative pressure in the system by transitioning from a collapsed configuration to an expanded configuration. The system may include an activation member to initiate transitioning of the fluid receptacle.Type: GrantFiled: August 20, 2014Date of Patent: March 29, 2016Assignee: C. R. Bard, Inc.Inventors: Mark A. Christensen, Steven M. Smith, Jim C. Beasley, Kelly B. Powers
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Patent number: 9265898Abstract: An anesthetic dispensing device (100) particularly adapted to apply anesthetic agent to the oral cavity and upper tracheal area of a medical patient prior to intubation of such patient. An exemplary dispenser (100) includes a handle (110) operably connected to a retractor (112) that carries an anesthetic dispensing device (104). A currently preferred dispensing device (104) includes a fluid-dispersing nozzle (118) in fluid communication with a syringe (116). Sometimes, an optical device (164) is coupled to the dispenser (100) to permit direct visualization of the application of anesthetic agent.Type: GrantFiled: September 12, 2008Date of Patent: February 23, 2016Assignee: Wolfe Tory Medical, Inc.Inventors: Govind R. C. Rajan, Marshall T. Denton, Perry W. Croll, Mark A. Christensen, Timothy R. Wolfe, J. Michael Brown
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Publication number: 20150289903Abstract: A valved sheath introducer for venous cannulation, including a valve, sheath, handle and cap. The valve is configured to permit safe introduction and removal of medical instruments through the sheath introducer. The valve may have one or more anchoring members and a thickened central portion through which a slit is formed. The central portion may have one or more concave surfaces and the slit can be angled with respect to the top surface of the valve. The cap is attached to the handle, compressing a portion of the valve therebetween.Type: ApplicationFiled: June 24, 2015Publication date: October 15, 2015Inventors: Mark A. Christensen, Steven M. Smith, Walter H. Shang, James D. Beal
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Patent number: 9108033Abstract: A valved sheath introducer for venous cannulation, including a valve, sheath, handle and cap. The valve is configured to permit safe introduction and removal of medical instruments through the sheath introducer. The valve may have one or more anchoring members and a thickened central portion through which a slit is formed. The central portion may have one or more concave surfaces and the slit can be angled with respect to the top surface of the valve. The cap is attached to the handle, compressing a portion of the valve therebetween.Type: GrantFiled: December 29, 2009Date of Patent: August 18, 2015Assignee: C. R. Bard, Inc.Inventors: Mark A. Christensen, Steven M. Smith, Walter Shang, James D. Beal
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Publication number: 20150119806Abstract: An insertion tool for inserting a catheter into a body of a patient is disclosed. The insertion tool unifies needle insertion, guidewire advancement, and catheter insertion in a single device. In one embodiment, the insertion tool comprises a housing in which at least a portion of the catheter is initially disposed, a hollow needle distally extending from the housing with at least a portion of the catheter pre-disposed over the needle, and a guidewire pre-disposed within the needle. A guidewire advancement assembly is also included for selectively advancing the guidewire distally past a distal end of the needle in preparation for distal advancement of the catheter. In one embodiment a catheter advancement assembly is also included for selectively advancing the catheter into the patient. Each advancement assembly can include a slide or other actuator that enables a user to selectively advance the desired component.Type: ApplicationFiled: December 30, 2014Publication date: April 30, 2015Inventors: Daniel B. Blanchard, John W. Hall, Jason R. Stats, Mark A. Christensen
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Patent number: 8998852Abstract: An insertion tool for inserting a catheter into a body of a patient is disclosed. The insertion tool unifies needle insertion, guidewire advancement, and catheter insertion in a single device. In one embodiment, the insertion tool comprises a housing in which at least a portion of the catheter is initially disposed, a hollow needle distally extending from the housing with at least a portion of the catheter pre-disposed over the needle, and a guidewire pre-disposed within the needle. A guidewire advancement assembly is also included for selectively advancing the guidewire distally past a distal end of the needle in preparation for distal advancement of the catheter. In one embodiment a catheter advancement assembly is also included for selectively advancing the catheter into the patient. Each advancement assembly can include a slide or other actuator that enables a user to selectively advance the desired component.Type: GrantFiled: October 2, 2013Date of Patent: April 7, 2015Assignee: C. R. Bard, Inc.Inventors: Daniel B. Blanchard, John W. Hall, Jason R. Stats, Mark A. Christensen
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Publication number: 20150038904Abstract: A syringe structured to permit multiple filling and emptying cycles with a single syringe, but then to automatically disable that syringe to resist syringe reuse subsequent to a final dose-ejecting cycle. The syringe includes a plunger with a distal tip carrying capture structure that protrudes from the dispensing aperture of the syringe at a fluid fully-expelled position. A fluid discharge attachment can be coupled to the syringe to guide dispensing one or more dose of treatment substance. A first locking element, typically carried by the fluid discharge attachment, couples with the capture structure to resist retraction of the fully-depressed plunger, and thereby resists reciprocation of the plunger to prevent reuse of the syringe. Effectively, the discharge aperture of the syringe is pinned between an internally disposed stopper and the external capture structure.Type: ApplicationFiled: March 22, 2013Publication date: February 5, 2015Applicant: Wolfe Tory Medical, Inc.Inventors: Marshall T. Denton, Perry W. Croll, Mark A. Christensen, Huy N. Tran
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Patent number: 8932258Abstract: An insertion tool for inserting a catheter into a body of a patient is disclosed. The insertion tool unifies needle insertion, guidewire advancement, and catheter insertion in a single device. In one embodiment, the insertion tool comprises a housing in which at least a portion of the catheter is initially disposed, a hollow needle distally extending from the housing with at least a portion of the catheter pre-disposed over the needle, and a guidewire pre-disposed within the needle. A guidewire advancement assembly is also included for selectively advancing the guidewire distally past a distal end of the needle in preparation for distal advancement of the catheter. In one embodiment a catheter advancement assembly is also included for selectively advancing the catheter into the patient. Each advancement assembly can include a slide or other actuator that enables a user to selectively advance the desired component.Type: GrantFiled: May 13, 2011Date of Patent: January 13, 2015Assignee: C. R. Bard, Inc.Inventors: Daniel B. Blanchard, John W. Hall, Jason R. Stats, Mark A. Christensen
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Publication number: 20140358095Abstract: A corporeal drainage system and a method of draining fluid from a bodily cavity. The corporeal drainage system includes a connection tube and a fluid receptacle in fluid communication with the connection tube. The fluid receptacle creates a negative pressure in the system by transitioning from a collapsed configuration to an expanded configuration. The system may include an activation member to initiate transitioning of the fluid receptacle.Type: ApplicationFiled: August 20, 2014Publication date: December 4, 2014Inventors: Mark A. Christensen, Steven M. Smith, Jim C. Beasley, Kelly B. Powers
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Publication number: 20140309624Abstract: An elongated medical device includes a core element, a polymer member, a closure element, and a permanent magnetic element. The core element may have a distal region including a first region with a diameter greater than a diameter of a second region, the second region distal of the first region and terminating at a core element distal end. The polymer member may be circumferentially disposed about an entire length of the core element and extending distal of the core element distal end. The closure element may be affixed to a distal end of the polymer member. The permanent magnetic element may be disposed along the second region proximal to the core element distal end, and may include a plurality of permanent magnetic elements spaced apart along the second region.Type: ApplicationFiled: June 27, 2014Publication date: October 16, 2014Inventors: Matthew W. Bown, Mark A. Christensen, Guy Rome, Bret Hamatake
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Patent number: 8814839Abstract: A corporeal drainage system and a method of draining fluid from a bodily cavity. The corporeal drainage system includes a connection tube and a fluid receptacle in fluid communication with the connection tube. The fluid receptacle creates a negative pressure in the system by transitioning from a collapsed configuration to an expanded configuration. The system may include an activation member to initiate transitioning of the fluid receptacle.Type: GrantFiled: November 28, 2012Date of Patent: August 26, 2014Assignee: C. R. Bard, Inc.Inventors: Mark A. Christensen, Steven M. Smith, Jim C. Beasley, Kelly B. Powers
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Patent number: 8784336Abstract: A stylet capable of being at least partially disposed within a lumen of a device is disclosed. This stylet may include an elongated body comprising a proximal end, a distal end, and at least one magnetic material. In certain embodiments, the elongated body may also include at least one core element, a tubular member circumferentially disposed about at least a portion of the core element, and/or at least one support member circumferentially disposed about at least a portion of the core element. In addition, a matrix material may be disposed between the core element and the tubular member to retain the magnetic material within the elongated body. A catheter assembly including a stylet and a corresponding method of manufacture are also disclosed.Type: GrantFiled: August 23, 2006Date of Patent: July 22, 2014Assignee: C. R. Bard, Inc.Inventors: Matthew W. Bown, Mark A. Christensen, Guy Rome, Bret Hamatake
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Patent number: 8752328Abstract: The disclosure provides compositions that can be used to make films to increase the efficiency of producing plants and plant parts. The films are designed in part to be environmentally friendly and/or edible. Also provided are methods of using such compositions as well as plants and plant parts comprising such compositions.Type: GrantFiled: April 22, 2010Date of Patent: June 17, 2014Assignee: State of Oregon acting by and through the State Board of Higher Education on behalf of Oregon State UniversityInventors: Clive Kaiser, J. Mark Christensen
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Patent number: 8720065Abstract: A valved sheath introducer for venous cannulation, including a valve, sheath, handle and cap. The valve is configured to permit safe introduction and removal of medical instruments through the sheath introducer. The valve may have one or more anchoring members and a thickened central portion through which a slit is formed. The central portion may have one or more concave surfaces and the slit can be angled with respect to the top surface of the valve. The cap is attached to the handle, compressing a portion of the valve therebetween.Type: GrantFiled: March 29, 2012Date of Patent: May 13, 2014Assignee: C. R. Bard, Inc.Inventors: Mark A. Christensen, Steven M. Smith, Walter H. Shang, James D. Beal
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Publication number: 20140088455Abstract: An improved apparatus for monitoring the intra-abdominal pressure of a hospitalized patient includes a urinary catheter connected to a urine valve having selectable communication positions between a discharge end of the urinary catheter and either a drain or a fluid source. Preferably, the urine valve has a housing adapted to resist patient discomfort from leg-valve contact. One operable protective housing may be embodied as a separate tray component. Plumbing structure desirably maintains fluid supply and drain conduits in a substantially parallel arrangement to assist routing those conduits between a patient's legs. When the urine valve is oriented for communication to the fluid source, an infusion pump may be used to introduce a known quantity of fluid through the urine valve and into the patient's bladder where the fluid's pressure can be measured.Type: ApplicationFiled: November 26, 2013Publication date: March 27, 2014Applicant: CONVATEC TECHNOLOGIES INC.Inventors: Mark A. CHRISTENSEN, Timothy R. WOLFE, Perry W. CROLL, Marshall T. DENTON, Edward J. KIMBALL
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Publication number: 20140031752Abstract: An insertion tool for inserting a catheter into a body of a patient is disclosed. The insertion tool unifies needle insertion, guidewire advancement, and catheter insertion in a single device. In one embodiment, the insertion tool comprises a housing in which at least a portion of the catheter is initially disposed, a hollow needle distally extending from the housing with at least a portion of the catheter pre-disposed over the needle, and a guidewire pre-disposed within the needle. A guidewire advancement assembly is also included for selectively advancing the guidewire distally past a distal end of the needle in preparation for distal advancement of the catheter. In one embodiment a catheter advancement assembly is also included for selectively advancing the catheter into the patient. Each advancement assembly can include a slide or other actuator that enables a user to selectively advance the desired component.Type: ApplicationFiled: October 2, 2013Publication date: January 30, 2014Applicant: C. R. Bard, Inc.Inventors: Daniel B. Blanchard, John W. Hall, Jason R. Stats, Mark A. Christensen
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Publication number: 20130298902Abstract: An atomizing nozzle structured particularly for nasal therapy. Preferred embodiments include a 2-piece atomizing nozzle structured to couple with luer-locking structure carried by a syringe. Such an atomizing nozzle includes a nasal stopper and a stem. A preferred nasal stopper includes a distal tip sized for insertion into a nostril of a human child, with a proximal shield portion being structured to resist over-insertion of a discharge orifice into the nostril. A nasal stopper desirably provides a centering function to urge the discharge orifice away from a nasal wall. One operable stem is structured to couple with the stopper and desirably carries unitary thread structure at a proximal end. A second operable stem is structured as a unitary part of the nasal stopper and also desirably carries unitary thread structure at a proximal end. Certain embodiments may also include spacer structure configured to reduce a dead volume inside the atomizing nozzle.Type: ApplicationFiled: November 11, 2011Publication date: November 14, 2013Applicant: WOLFE TORY MEDICAL, INC.Inventors: Marshall T. Denton, Perry W. Croll, Mark A. Christensen, Timothy R. Wolfe, J. Michael Brown
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Publication number: 20130277443Abstract: Described is an atomizing nozzle having a relatively small frontal area permitting insertion of a nozzle into small diameter medical conduit(s). A body of a preferred nozzle has a characteristic size (e.g., cross-section diameter) of less than about 0.2 inch (0.5 cm). The nozzle body is typically carried on an extension member, which can be transversely flexible to permit passage of a nozzle body through a tube and along a nonlinear path. The nozzle body is typically connected to an extension member by way of a lap joint associated with the nozzle body. Preferred embodiments have a De/O ratio of less than 12.0, a Db/O ratio of less than about 18, and a Db/De ratio of less than about 1.1. Certain embodiments include a swirling chamber disposed upstream of the ejection orifice and having a proximal wall with a portion configured to at least approximate a portion of a dome, or other curved surface.Type: ApplicationFiled: October 20, 2010Publication date: October 24, 2013Applicant: WOLFE TORY MEDICAL, INC.Inventors: Perry W. Croll, Marshall T. Denton, Mark A. Christensen, Huy N. Tran
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Patent number: RE45335Abstract: Disclosed are formulae and methods for the simultaneous relief of a variety of unpleasant symptoms of poison ivy on the skin. The compositions of the present invention remove toxic urushiol, relieve itching of the skin from urushiol, and heal the dermatitis caused by urushiol. A preferred embodiment of the invention is a topical dosage form which can be applied as often as desired, may be scrubbed onto the skin, and leaves a soothing effect on the skin after rinsing with warm water.Type: GrantFiled: November 23, 2013Date of Patent: January 13, 2015Assignee: Tec Laboratories, Inc.Inventors: Robert Lee Smith, John Mark Christensen, Wendy S. Langley, Vernon W. Smith, Brian Chipman