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Norton, MN

Britt K. Norton, Eden Prairie, MN US

Patent application numberDescriptionPublished
20100100098APPARATUS AND METHODS FOR REMOVAL OF INTERVERTEBRAL DISC TISSUES - Apparatus and methods for removing tissue from an intervertebral disc are disclosed. The apparatus can include an elongated guide tube, a rotary cutting member and a drive shaft. Other apparatus can include an elongated guide tube, an inner guide tube, a cutting head, a rotary cutting member and a drive shaft. The elongated guide tube has a bendable end. The apparatus are generally configured to extend and withdraw a rotary cutting member while controllably bending the bendable end of the guide tube.04-22-2010

Daniel V. Norton, St. Paul, MN US

Patent application numberDescriptionPublished
20110014391METHODS OF SLIDE COATING TWO OR MORE FLUIDS - A method of slide coating that includes providing a first fluid, wherein the first fluid includes at least one solvent, at least one single unit polymeric precursor or a combination thereof; providing a second fluid, wherein the second fluid includes multi unit polymeric precursors; flowing the first fluid down a first slide surface, to create a first fluid layer on the first slide surface, the first slide surface being positioned adjacent a substrate; flowing the second fluid down a second slide surface, the second slide surface positioned relative to the first slide surface such that the second fluid flows from the second slide surface to above the first slide surface onto the first fluid layer to create the second fluid layer on the first slide surface; coating the substrate with the first and second fluid by flowing the first fluid layer and the second fluid layer from the first slide surface to the substrate forming first and second coated layers; moving the substrate; and at least partially curing the first coated layer, the second coated layer, or some combination thereof.01-20-2011
20110027493METHODS OF SLIDE COATING FLUIDS CONTAINING MULTI UNIT POLYMERIC PRECURSORS - A method of slide coating that includes providing a first fluid (02-03-2011
20110059249METHODS OF SLIDE COATING TWO OR MORE FLUIDS - A method of slide coating that includes providing a first fluid including at least one solvent and at least one polymer; providing a second fluid, including multi unit polymeric precursors; flowing the first fluid down a first slide surface, to create a first fluid layer on the first slide surface; flowing the second fluid down a second slide surface; coating the substrate with the first and second fluid by flowing the first fluid layer and the second fluid layer from the first slide surface to the substrate; moving the substrate; and curing the first fluid, the second fluid, or some combination thereof.03-10-2011

John D. Norton, New Brighton, MN US

Patent application numberDescriptionPublished
20090078344TANTALUM ANODES FOR HIGH VOLTAGE CAPACITORS EMPLOYED BY IMPLANTABLE MEDICAL DEVICES AND FABRICATION THEREOF - A high voltage capacitor anode for an implantable medical device is fabricated by sintering, anodizing and heat treating a pressed tantalum powder slug. The sintering may be performed at a temperature between approximately 1500° C. and approximately 1600° C. for a time between approximately 3 minutes and approximately 35 minutes; subsequent anodization may be performed by immersing the slug in an electrolyte at a temperature between approximately 15° C. and approximately 30° C. and then applying a voltage across the slug, the voltage being between approximately 175 Volts and approximately 375 Volts; subsequent heat treating may be performed at a temperature between approximately 400° C. and approximately 460° C. for a time between approximately 50 minutes and approximately 65 minutes. Following heat treating, the anode is reformed by a second anodization.03-26-2009
20090237862CAPACITORS FOR MEDICAL DEVICES - The invention is directed to designs for capacitors of implantable medical devices (IMDs) such as implantable defibrillators, implantable cardioverter-defibrillators, implantable pacemaker-cardioverter-defibrillators, and the like. The capacitor designs can reduce capacitor volume significantly and may also improve charge holding capacity relative to conventional capacitor designs. Moreover, since capacitors typically comprise a significant portion of the volume of an IMD, significant reductions in capacitor volume can likewise significantly reduce the size of the IMD.09-24-2009
20100289458CAPACITOR ELECTROLYTE - A capacitor for an implantable medical device is presented. The capacitor includes an anode, a cathode, a separator therebetween, and an electrolyte over the anode, cathode, and separator. The electrolyte includes ingredients comprising acetic acid, ammonium acetate, phosphoric acid, and tetaethylene glycol dimethyl ether. The capacitor has an operating voltage ninety percent or greater of its formation voltage.11-18-2010
20110045253CONTROL OF PROPERTIES OF PRINTED ELECTRODES IN AT LEAST TWO DIMENSIONS - A method including printing a layer of an electrode on a substrate is described. Printing the layer may include ejecting a first coating composition and a second coating composition from a nozzle. The first coating composition may comprise at least a first coating material and the second coating composition may comprise at least a second coating material. The first coating composition and the second coating composition are introduced over the substrate. An electrode comprising a layer printed on a substrate wherein the layer comprises a first coating material and a second coating material is also described.02-24-2011
20110125077OPTICAL STIMULATION THERAPY - Methods of delivering optical stimulation to a target tissue from an optical stimulation device are provided. One method comprises sensing a temperature at the optical stimulation device or proximate to the optical stimulation device, and adjusting the delivery of light to the target tissue based on the sensed temperature. Another method comprises delivering the light to the target tissue with an optical light guide and sensing bioelectric signals with a sense electrode, wherein the optical light guide and the sense electrode each comprise a material that produces substantially no induced current in an electromagnetic field. Another method comprises delivering light from a light source of an optical stimulation device to a window of the optical stimulation device, delivering the light from the window to an optical light guide optically connected to the window, and delivering the light to a target tissue via the optical light guide.05-26-2011
20110125078OPTICAL STIMULATION THERAPY - A method for delivering optical stimulation comprises transfecting a target tissue with a light-sensitive channel protein sensitive to light in a wavelength range, delivering light in the wavelength range to the target tissue via an optical stimulation device, substantially simultaneously with delivering light to the target tissue, sensing bioelectric signals, determining a patient therapeutic state based on the bioelectric signals, and adjusting the delivery of the light to the target tissue based on the sensed patient therapeutic state.05-26-2011
20110184483IMPLANTABLE MEDICAL DEVICES WITH LOW VOLUME BATTERIES, AND SYSTEMS - Implantable medical devices, implantable medical device systems that include such implantable medical devices, and implantable medical device batteries, as well as methods of making. Such devices can include a battery of relatively small volume but of relatively high power (reported as therapeutic power) and relatively high capacity (reported as capacity density).07-28-2011
20120105017METHOD OF MAINTAINING WET-TANTALUM ELECTROLYTIC CAPACITORS - Wet-tantalum capacitors used in a medical device are charged to and maintained at a maintenance voltage between full energy charges so that deformation in the wet-tantalum capacitor is substantially inhibited.05-03-2012

Patent applications by John D. Norton, New Brighton, MN US

John D. Norton, Saint Paul, MN US

Patent application numberDescriptionPublished
20110223464Separator Systems for Batteries - A battery cell is presented. The battery cell includes an anode, a cathode spaced from and operatively associated with the anode, an electrolyte operatively associated with the anode and the cathode. A layered separator includes a plurality of separator material layers disposed between the anode and cathode. The plurality of separator material layers includes a first layer and a second layer. The first layer is characterized by a first value of a physical property and the second layer is characterized by a second value of the physical property.09-15-2011

John D. Norton, Minneapolis, MN US

Patent application numberDescriptionPublished
20120110808CAPACITOR REFORMATION METHOD AND APPARATUS - A method of reforming a wet-tantalum capacitor includes providing a medical device comprising a wet-tantalum capacitor. The capacitor has a rated voltage and including a hydrated anodic deposit. The method further includes charging the capacitor to a voltage that is less than approximately seventy-five percent of the rated voltage and at least partially discharging the capacitor after the charging step. The charging step is performed at a sufficient voltage to dehydrate the anodic deposit while not significantly decreasing the service life of the capacitor.05-10-2012

John Daniel Norton, Saint Paul, MN US

Patent application numberDescriptionPublished
20110160784DIVERSE CAPACITOR PACKAGING FOR MAXIMIZING VOLUMETRIC EFFICIENCY FOR MEDICAL DEVICES - Capacitor packaging according to the disclosure provides advantages particularly in connection to compact and/or complex-shaped medical devices (e.g., having limited interior volume defined by domed and/or irregular exterior surfaces). In addition, capacitors of the type shown and described herein can be utilized in relatively compact external defibrillators, such as automatic external defibrillators or clinician-grade, automated or manually-operated external defibrillators. In one form a plurality of capacitors having substantially flat exterior surfaces are placed in an abutting relationship between at least a pair of major surfaces and the major surfaces are spaced from an opposing or adjacent surface in a non-parallel configuration. In other forms, one or more exterior surface portions have a common and/or complex radius dimension (i.e., the surfaces are curved).06-30-2011