Marshall T Denton
Land Surveyors in Salt Lake City, UT

License number
Utah 170327-9925
Issued Date
Jan 1, 1911
Expiration Date
Dec 31, 1999
Category
Engineer/Land Surveyor
Type
Engineer in Training - Obsolete
Address
Address
Salt Lake City, UT

Professional information

Marshall Denton Photo 1

Atomizer For Nasal Therapy

US Patent:
2013029, Nov 14, 2013
Filed:
Nov 11, 2011
Appl. No.:
13/884576
Inventors:
Marshall T. Denton - Salt Lake City UT, US
Perry W. Croll - Salt Lake City UT, US
Mark A. Christensen - Salt Lake City UT, US
Timothy R. Wolfe - Salt Lake City UT, US
J. Michael Brown - Salt Lake City UT, US
Assignee:
WOLFE TORY MEDICAL, INC. - Salt Lake City UT
International Classification:
A61M 11/00
US Classification:
12820014
Abstract:
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. Other embodiments may also include spacer structure configured to reduce dead volume inside a syringe that is coupled to the atomizing nozzle.


Marshall Denton Photo 2

Medical Valve And Method To Monitor Intra-Abdominal Pressure

US Patent:
7644722, Jan 12, 2010
Filed:
Aug 9, 2005
Appl. No.:
11/199790
Inventors:
Mark A. Christensen - Salt Lake City UT, US
Timothy R. Wolfe - Salt Lake City UT, US
Perry W. Croll - Salt Lake City UT, US
Marshall T. Denton - Salt Lake City UT, US
Edward J. Kimball - Salt Lake City UT, US
Assignee:
Wolfe Tory Medical, Inc. - Salt Lake City UT
International Classification:
G05D 7/00, G05D 9/00
US Classification:
137107, 251 33, 251 45
Abstract:
An apparatus for monitoring the intra-abdominal pressure of a hospitalized patient includes a urinary catheter connected to a urine valve providing selectable communication between a discharge end of the urinary catheter and either a drain or a fluid source. Preferably, the urine valve is adapted for remote actuatation and has a housing adapted to resist patient discomfort from leg-valve contact. 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 to permit communication with the fluid source, an infusion pump may be used to infuse a known quantity of fluid through the urine valve and into the patient's bladder. A pressure transducer desirably is connected in-circuit to indicate the fluid's pressure. To facilitate the infusion process, an automatic flow control device may be included in a fluid supply path and arranged to permit repetitive operation of a syringe to inject a bolus of fluid into the patient's bladder.


Marshall Denton Photo 3

Continuous Intra-Abdominal Pressure Monitoring Urinary Catheter With Optional Core Temperature Sensor

US Patent:
2008010, May 1, 2008
Filed:
Nov 21, 2005
Appl. No.:
11/791586
Inventors:
Marshall T. Denton - Salt Lake City UT, US
Timothy R. Wolfe - Salt Lake City UT, US
Perry W. Croll - Salt Lake City UT, US
Mark A. Christensen - Salt Lake City UT, US
Assignee:
Wolfe Tory Medical, Inc. - Salt Lake City UT
International Classification:
A61B 5/03, A61B 5/01, A61M 27/00
US Classification:
600549, 600561, 600581
Abstract:
A device structured to generate an input signal to a monitor () to visually indicate a value for one or more physiological state variables measured by one or more transducers () associated with a medical patient. Preferred embodiments include a pressure transducer () placed in fluid communication with the patient's bladder () effective to infer intra-abdominal pressure P. Embodiments may also include a temperature transducer () configured to measure the temperature of fluid in/near the bladder () to infer core body temperature. Certain embodiments of the invention may include a second pressure transducer () configured to measure arterial blood pressure. In the latter case, signals received from the two pressure transducers () may be manipulated to produce a third signal corresponding to abdominal perfusion pressure, which can then be indicated on a numeric display device ().


Marshall Denton Photo 4

Intubation Detection System With Transducer Based Indicator

US Patent:
5885248, Mar 23, 1999
Filed:
Jan 6, 1997
Appl. No.:
8/778612
Inventors:
Marshall T. Denton - Salt Lake City UT
Assignee:
Wolf Tory Medical, Inc. - Salt Lake City UT
International Classification:
A61M 2900
US Classification:
604100
Abstract:
An intubation detection system includes a pressure changing source, such as a volume changing device, connected to a transducer and an endotracheal tube. The intubation detection system determines whether the hollow tip of an endotracheal tube is in the esophagus or trachea of a patient. If the tip is in the trachea, the tip is not occluded. If the tip is in the esophagus, it becomes occluded. In one embodiment, the transducer is a pressure transducer, a chamber of a volume changing device is selectively increased in volume, and a flow restrictor is placed between the tip and the chamber and transducer. If the tip is in the trachea, when the volume is increased, the pressure at the transducer temporarily decreases, but quickly returns to atmospheric pressure. If the tip is in the esophagus, when the volume is increased, the pressure at the transducer decreases and remains at that pressure because the tip is occluded. A mass flow transducer may also be used.


Marshall Denton Photo 5

Medical Valve And Method To Monitor Intra-Abdominal Pressure

US Patent:
7726328, Jun 1, 2010
Filed:
Aug 26, 2009
Appl. No.:
12/583823
Inventors:
Mark A. Christensen - Salt Lake City UT, US
Timothy R. Wolfe - Salt Lake City UT, US
Perry W. Croll - Sandy UT, US
Marshall T. Denton - Salt Lake City UT, US
Edward J. Kimball - Salt Lake City UT, US
Assignee:
Wolfe Tory Medical, Inc. - Salt Lake City UT
International Classification:
G05D 7/00, G05D 9/00
US Classification:
137107, 251 45
Abstract:
An apparatus for monitoring the intra-abdominal pressure of a hospitalized patient includes a urinary catheter connected to a urine valve providing selectable communication between a discharge end of the urinary catheter and either a drain or a fluid source. Preferably, the urine valve is adapted for remote actuation and has a housing adapted to resist patient discomfort from leg-valve contact. 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 to permit communication with the fluid source, an infusion pump may be used to infuse a known quantity of fluid through the urine valve and into the patient's bladder. A pressure transducer desirably is connected in-circuit to indicate the fluid's pressure. To facilitate the infusion process, an automatic flow control device may be included in a fluid supply path and arranged to permit repetitive operation of a syringe to inject a bolus of fluid into the patient's bladder.


Marshall Denton Photo 6

Apparatus For Monitoring Intra-Abdominal Pressure

US Patent:
7892181, Feb 22, 2011
Filed:
Sep 1, 2005
Appl. No.:
11/219319
Inventors:
Mark A. Christensen - Salt Lake City UT, US
Timothy R. Wolfe - Salt Lake City UT, US
Perry W. Croll - Salt Lake City UT, US
Marshall T. Denton - Salt Lake City UT, US
Edward J. Kimball - Salt Lake City UT, US
Assignee:
AbViser Medical LLC - Salt Lake City UT
International Classification:
A61B 5/00
US Classification:
600561
Abstract:
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. Desirably, a double check valve is included in a fluid supply path and arranged to permit repetitive operation of a syringe to inject a bolus of fluid into the patient's bladder. Subsequent to making a pressure measurement, the urine valve is returned to the bladder draining position.


Marshall Denton Photo 7

Fluid Delivery Valve

US Patent:
5971357, Oct 26, 1999
Filed:
Nov 14, 1997
Appl. No.:
8/971075
Inventors:
Marshall T. Denton - Salt Lake City UT
Mark A. Christensen - Salt Lake City UT
Assignee:
Wolfe Tory Medical, Inc. - Salt Lake City UT
International Classification:
F16K 1304
US Classification:
251144
Abstract:
A fluid delivery valve for use in fluid conducting systems includes a rigid bracing member positioned within a hollow, flexible, resilient valve housing. By applying opposing lateral forces to the external surface of the housing near a widened portion of the bracing member, the valve housing deforms around the widened portion and the valve is actuated. Actuating the valve permits fluid communication between the inner chamber of the valve housing, and a channel which extends through an enlarged portion. The channels are sealed by the inner wall of the housing when the opposing forces are released. The fluid is thus selectively allowed to travel past the bracing member.


Marshall Denton Photo 8

Temporary Pharyngeal Airway

US Patent:
2010006, Mar 18, 2010
Filed:
Sep 17, 2009
Appl. No.:
12/586098
Inventors:
Govind R.C. Rajan - Ballwin MO, US
Marshall T. Denton - Salt Lake City UT, US
Perry W. Croll - Salt Lake City UT, US
Mark A. Christensen - Salt Lake City UT, US
Timothy R. Wolfe - Salt Lake City UT, US
J. Michael Brown - Salt Lake City UT, US
Huy N. Tran - Riverton UT, US
Assignee:
Wolfe Tory Medical, Inc. - Salt Lake City UT
International Classification:
A61M 16/04
US Classification:
12820714
Abstract:
A temporary airway that can be used to facilitate an intubation procedure. Desirably, the temporary airway is removable from an installed intubation conduit without requiring disassembly of the intubation system and interrupting breathing treatment of the patient. Certain embodiments include an intubation lumen, and a treatment lumen. The intubation lumen is configured to assist in guiding an intubation conduit into operable position in a medical patient. The treatment lumen is operable to apply an anesthetic agent, and/or treatment fluids, including gas, such as Oxygen or compressed air. Certain treatment lumens are associated with a fluid dispersion nozzle, most preferably an atomizing nozzle.


Marshall Denton Photo 9

Transducer Housing With A Calibration Port

US Patent:
5273047, Dec 28, 1993
Filed:
Mar 10, 1993
Appl. No.:
8/028997
Inventors:
Carl F. Tripp - Costa Mesa CA
Fred P. Lampropoulos - Salt Lake City UT
Steven R. Taylor - Salt Lake City UT
William Padilla - Salt Lake City UT
Marshall T. Denton - Salt Lake City UT
Assignee:
Merit Medical Systems, Inc. - Salt Lake City UT
International Classification:
A61B 50215
US Classification:
128675
Abstract:
A novel pressure transducer apparatus for medical pressure monitoring apparatus having a housing with a calibration port. The patient side of the transducer senses fluid pressures to be monitored. The non-patient side of the transducer is hermetically sealed in the housing of the apparatus. The housing has a female calibration port communicating, via a pinhole, with the non-patient side of the transducer. The non-patient side of the transducer can thus alternatively be vented to atmospheric pressure or be exposed to a vacuum calibration pressure.


Marshall Denton Photo 10

Temporary Surgical Closure For A Body Cavity

US Patent:
2010008, Apr 8, 2010
Filed:
Mar 14, 2008
Appl. No.:
12/450084
Inventors:
Michael L. Cheatham - Orlando FL, US
Perry W. Croll - Salt Lake City UT, US
Timothy R. Wolfe - Salt Lake City UT, US
Marshall T. Denton - Salt Lake City UT, US
J. Michael Brown - Salt Lake City UT, US
Mark A. Christensen - Salt Lake City UT, US
International Classification:
A61B 17/08, A61B 1/00
US Classification:
606213, 600184
Abstract:
Described is an apparatus () adapted to temporarily close a surgical access opening () to a patient's body cavity (). The apparatus includes a base () that is disposed around a perimeter of the opening, and a cap () that typically provides resealable access through the opening. The base generally forms an air-resistant seal to the patient's skin. In certain embodiments, the cap may be removable from the base. The base typically includes structure () configured to permit suction to be applied effective to remove undesired fluids from the body cavity. A cap is adapted to change in size to accommodate expansion and contraction of viscera.