Patents by Inventor David A. Fielder

David A. Fielder 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: 11826536
    Abstract: An implantable percutaneous fluid delivery device is described that includes a subcutaneous base portion having one or more ports for supplying fluid to one or more implanted catheter devices and a percutaneous portion including an extracorporeal surface. The one or more ports of the subcutaneous base portion are accessible from the extracorporeal surface of the percutaneous portion. The subcutaneous base portion is at least partially insertable into a complementary recess formed in a bone, the subcutaneous base portion including one or more features for gripping the internal surface of such a complementary recess thereby directly anchoring the subcutaneous base portion to the bone. The device may be used to route fluid to neurosurgical catheters optionally via a router unit.
    Type: Grant
    Filed: March 23, 2020
    Date of Patent: November 28, 2023
    Assignee: RENISHAW (IRELAND) LIMITED
    Inventors: Paul David Fielder, Steven S Gill, Trefor Owen Lewis, Andrew Samuel Vick
  • Patent number: 11717663
    Abstract: Apparatus for delivering therapeutic agents to the central nervous system of a subject is described. The apparatus includes at least one intracranial catheter and a percutaneous access device. The percutaneous access device includes a body having at least one extracorporeal surface and at least one subcutaneous surface, the body defining at least one port for connection to an implanted intracranial catheter. The port is accessible from the extracorporeal surface of the device, but is provided with a seal such as a rubber bung between the lumen of the port and the extracorporeal surface. The percutaneous access device may have more than two ports and/or a flange. A method of implanting the percutaneous access device is also described.
    Type: Grant
    Filed: August 20, 2020
    Date of Patent: August 8, 2023
    Assignee: RENISHAW (IRELAND) LIMITED
    Inventors: Steven Streatfield Gill, Paul David Fielder
  • Publication number: 20200376252
    Abstract: Apparatus for delivering therapeutic agents to the central nervous system of a subject is described. The apparatus includes at least one intracranial catheter and a percutaneous access device. The percutaneous access device includes a body having at least one extracorporeal surface and at least one subcutaneous surface, the body defining at least one port for connection to an implanted intracranial catheter. The port is accessible from the extracorporeal surface of the device, but is provided with a seal such as a rubber bung between the lumen of the port and the extracorporeal surface. The percutaneous access device may have more than two ports and/or a flange. A method of implanting the percutaneous access device is also described.
    Type: Application
    Filed: August 20, 2020
    Publication date: December 3, 2020
    Applicant: RENISHAW (IRELAND) LIMITED
    Inventors: Steven Streatfield GILL, Paul David FIELDER
  • Patent number: 10751520
    Abstract: Apparatus for delivering therapeutic agents to the central nervous system of a subject is described. The apparatus includes at least one intracranial catheter and a percutaneous access device. The percutaneous access device includes a body having at least one extracorporeal surface and at least one subcutaneous surface, the body defining at least one port for connection to an implanted intracranial catheter. The port is accessible from the extracorporeal surface of the device, but is provided with a seal such as a rubber bung between the lumen of the port and the extracorporeal surface. The percutaneous access device may have more than two ports and/or a flange. A method of implanting the percutaneous access device is also described.
    Type: Grant
    Filed: December 23, 2014
    Date of Patent: August 25, 2020
    Assignee: RENISHAW (IRELAND) LIMITED
    Inventors: Steven Streatfield Gill, Paul David Fielder
  • Publication number: 20200215318
    Abstract: An implantable percutaneous fluid delivery device is described that includes a subcutaneous base portion having one or more ports for supplying fluid to one or more implanted catheter devices and a percutaneous portion including an extracorporeal surface. The one or more ports of the subcutaneous base portion are accessible from the extracorporeal surface of the percutaneous portion. The subcutaneous base portion is at least partially insertable into a complementary recess formed in a bone, the subcutaneous base portion including one or more features for gripping the internal surface of such a complementary recess thereby directly anchoring the subcutaneous base portion to the bone. The device may be used to route fluid to neurosurgical catheters optionally via a router unit.
    Type: Application
    Filed: March 23, 2020
    Publication date: July 9, 2020
    Applicant: RENISHAW (IRELAND) LIMITED
    Inventors: Paul David FIELDER, Steven S. GILL, Trefor Owen LEWIS, Andrew Samuel VICK
  • Patent number: 10596362
    Abstract: An implantable percutaneous fluid delivery device is described that includes a subcutaneous base portion having one or more ports for supplying fluid to one or more implanted catheter devices and a percutaneous portion including an extracorporeal surface. The one or more ports of the subcutaneous base portion are accessible from the extracorporeal surface of the percutaneous portion. The subcutaneous base portion is at least partially insertable into a complementary recess formed in a bone, the subcutaneous base portion including one or more features for gripping the internal surface of such a complementary recess thereby directly anchoring the subcutaneous base portion to the bone. The device may be used to route fluid to neurosurgical catheters optionally via a router unit.
    Type: Grant
    Filed: July 29, 2014
    Date of Patent: March 24, 2020
    Assignee: RENISHAW (IRELAND) LIMITED
    Inventors: Paul David Fielder, Steven S Gill, Trefor Owen Lewis, Andrew Samuel Vick
  • Publication number: 20160296293
    Abstract: Surgical apparatus is described that includes a surgical robot having a moveable arm for carrying a surgical tool. The apparatus also has x-ray imaging apparatus that includes at least one of an x-ray source and an x-ray detector. The moveable arm of the surgical robot is configured to carry at least one of the x-ray source and the x-ray detector. In this manner, the surgical robot can be used to perform x-ray imaging to allow patient registration. Methods of using the apparatus are also described.
    Type: Application
    Filed: November 21, 2014
    Publication date: October 13, 2016
    Applicant: RENISHAW PLC
    Inventors: Steven Streatfield GILL, Geoffrey MCFARLAND, Robert Neil HARRISON, Paul David FIELDER
  • Publication number: 20150157842
    Abstract: Apparatus for delivering therapeutic agents to the central nervous system of a subject is described. The apparatus includes at least one intracranial catheter and a percutaneous access device. The percutaneous access device includes a body having at least one extracorporeal surface and at least one subcutaneous surface, the body defining at least one port for connection to an implanted intracranial catheter. The port is accessible from the extracorporeal surface of the device, but is provided with a seal such as a rubber bung between the lumen of the port and the extracorporeal surface. The percutaneous access device may have more than two ports and/or a flange. A method of implanting the percutaneous access device is also described.
    Type: Application
    Filed: December 23, 2014
    Publication date: June 11, 2015
    Applicant: Renishaw (Ireland) Limited
    Inventors: Steven Streatfield GILL, Paul David FIELDER
  • Patent number: 8974422
    Abstract: Apparatus for delivering therapeutic agents to the central nervous system of a subject is described. The apparatus comprises at least one intracranial catheter and a percutaneous access device. The percutaneous access device comprises a body having at least one extracorporeal surface and at least one subcutaneous surface, the body defining at least one port for connection to an implanted intracranial catheter. The port is accessible from the extracorporeal surface of the device, but is provided with a seal such as a rubber bung between the lumen of the port and the extracorporeal surface. The percutaneous access device may have more than two ports and/or a flange. A method of implanting the percutaneous access device is also described.
    Type: Grant
    Filed: November 21, 2007
    Date of Patent: March 10, 2015
    Assignee: Renishaw (Ireland) Limited
    Inventors: Steven Streatfield Gill, Paul David Fielder
  • Publication number: 20140343500
    Abstract: An implantable percutaneous fluid delivery device is described that includes a subcutaneous base portion having one or more ports for supplying fluid to one or more implanted catheter devices and a percutaneous portion including an extracorporeal surface. The one or more ports of the subcutaneous base portion are accessible from the extracorporeal surface of the percutaneous portion. The subcutaneous base portion is at least partially insertable into a complementary recess formed in a bone, the subcutaneous base portion including one or more features for gripping the internal surface of such a complementary recess thereby directly anchoring the subcutaneous base portion to the bone. The device may be used to route fluid to neurosurgical catheters optionally via a router unit.
    Type: Application
    Filed: July 29, 2014
    Publication date: November 20, 2014
    Inventors: Paul David FIELDER, Steven S. GILL, Trefor Owen LEWIS, Andrew Samuel VICK
  • Patent number: 8815268
    Abstract: A simple and efficient method for the production of stable, clear, high-potency oat extracts is disclosed. The method employs the use of differential dissociation constants and ultrafiltration to stabilise extracts, prevent hazing, and prevent the loss of functional activity as an anti-irritant and anti-oxidant. Also disclosed are compositions of oat extracts derived from whole oat grains and oatmeal. Further disclosed are compositions of oat extracts for use in cosmetic, nutraceutical, therapeutic medical and veterinary preparations.
    Type: Grant
    Filed: August 2, 2013
    Date of Patent: August 26, 2014
    Assignee: CEAPRO, Inc.
    Inventors: Mark J. Redmond, David A. Fielder
  • Publication number: 20140066510
    Abstract: A simple and efficient method for the production of stable, clear, high-potency oat extracts is disclosed. The method employs the use of differential dissociation constants and ultrafiltration to stabilise extracts, prevent hazing, and prevent the loss of functional activity as an anti-irritant and anti-oxidant. Also disclosed are compositions of oat extracts derived from whole oat grains and oatmeal. Further disclosed are compositions of oat extracts for use in cosmetic, nutraceutical, therapeutic medical and veterinary preparations.
    Type: Application
    Filed: August 2, 2013
    Publication date: March 6, 2014
    Inventors: Mark J. Redmond, David A. Fielder
  • Patent number: 8632798
    Abstract: Cereal ?(1-3) ?(1-4) glucan is used as a film or coating agent to produce clear, edible, biodegradable, delivery, lubricating, and protecting agents. Cereal ?(1-3) ?(1-4) glucans are distinctive polymers of glucose differentiated from other polymers by not only their source but also their physicochemical properties. The ?(1-3) ?(1-4) forms a matrix to sequester other materials, such as pharmaceutical, medical and therapeutic agents, flavors, fragrances. The technology has applications to essential oils and non-aqueous materials that are rendered deliverable by the ?(1-3) ?(1-4) glucan. The ?(1-3) ?(1-4) glucan films described may be consumed whereby they dissolve in the mouth in a controlled manner and may be used for the delivery of pharmaceutical, medical or confectionery products.
    Type: Grant
    Filed: March 3, 2010
    Date of Patent: January 21, 2014
    Assignee: Ceapro Inc.
    Inventors: Mark J. Redmond, David A. Fielder
  • Patent number: 8512719
    Abstract: A simple and efficient method for the production of stable, clear, high-potency oat extracts is disclosed. The method employs the use of differential dissociation constants and ultrafiltration to stabilize extracts, prevent hazing, and prevent the loss of functional activity as an anti-irritant and anti-oxidant. Also disclosed are compositions of oat extracts derived from whole oat grains and oatmeal. Further disclosed are compositions of oat extracts for use in cosmetic, nutraceutical, therapeutic medical and veterinary preparations.
    Type: Grant
    Filed: January 25, 2011
    Date of Patent: August 20, 2013
    Assignee: Ceapro Inc.
    Inventors: Mark J. Redmond, David A. Fielder
  • Patent number: 8084914
    Abstract: A downhole electric motor device has a longitudinally extending tubular housing; a stator part deployed within the tubular housing; a stator coil winding looped through the stator part with an end turn having an apex; and a connecting device connecting between at least one of the coil windings and an end of the housing adjacent to an end of the stator part, thereby supporting the coil winding.
    Type: Grant
    Filed: January 26, 2009
    Date of Patent: December 27, 2011
    Assignee: Schlumberger Technology Corporation
    Inventors: Patrick M. McCartney, David Fielder
  • Publication number: 20110118352
    Abstract: A simple and efficient method for the production of stable, clear, high-potency oat extracts is disclosed. The method employs the use of differential dissociation constants and ultrafiltration to stabilise extracts, prevent hazing, and prevent the loss of functional activity as an anti-irritant and anti-oxidant. Also disclosed are compositions of oat extracts derived from whole oat grains and oatmeal. Further disclosed are compositions of oat extracts for use in cosmetic, nutraceutical, therapeutic medical and veterinary preparations.
    Type: Application
    Filed: January 25, 2011
    Publication date: May 19, 2011
    Applicant: CEAPRO, INC.
    Inventors: Mark J. REDMOND, David A. Fielder
  • Publication number: 20110059031
    Abstract: The present invention relates to oral compositions comprising a ? (1-3) ? (1-4) glucan and one, or more than one compound of interest. In particular, the present invention provides an oral composition comprising an effective amount of a ? (1-3) ? (1-4) glucan and an effective amount of one, or more than one of an antibacterial agent, a botanical extract, and a flavouring agent, and also provides a method of using this composition for maintaining fresh breath in a subject over a prolonged period of time.
    Type: Application
    Filed: November 12, 2010
    Publication date: March 10, 2011
    Applicant: CEAPRO INC.
    Inventors: Mark J. Redmond, David A. Fielder
  • Patent number: 7887823
    Abstract: A simple and efficient method for the production of stable, clear, high-potency oat extracts is disclosed. The method employs the use of differential dissociation constants and ultrafiltration to stabilize extracts, prevent hazing, and prevent the loss of functional activity as an anti-irritant and anti-oxidant. Also disclosed are compositions of oat extracts derived from whole oat grains and oatmeal. Further disclosed are compositions of oat extracts for use in cosmetic, nutraceutical, therapeutic medical and veterinary preparations.
    Type: Grant
    Filed: July 29, 2004
    Date of Patent: February 15, 2011
    Assignee: CEAPRO, Inc.
    Inventors: Mark J. Redmond, David A. Fielder
  • Publication number: 20110009879
    Abstract: A skull mount (50;150;170;200;300) is described that is attachable to a hole (60) formed in the skull. The skull mount (50;150;170;200;300) comprises an alignment guide (62;152;172;216;306) defining an alignment axis (22;210;312) along which neurosurgical instruments can be passed. The skull mount, when attached to a hole in a skull, is arranged such that it does not substantially protrude from the outermost surface of the skull and does not extend into the brain parenchyma. Also described is a neurosurgical alignment instrument (30,206) for aligning such a skull mount (50;150;170;200;300) that comprises an elongate shaft (32) and an element (34,36) protruding from the distal end of the elongate shaft (32) for engaging and aligning the alignment guide (62;152;172;216;306) of an associated skull mount (50;150;170;200;300).
    Type: Application
    Filed: October 6, 2008
    Publication date: January 13, 2011
    Applicant: RENISHAW (IRELAND) LIMITED
    Inventors: Hugo George Derrick, Paul David Fielder, Steven Streatfield Gill
  • Publication number: 20100318064
    Abstract: A neurosurgical catheter is described for insertion into the brain parenchyma of a subject. The catheter comprises a flexible tube and has a stiff, non-porous, tip comprising at least one fluid delivery aperture. The stiff tip of the catheter may be mechanically stiffer than the flexible tube. The stiff tip may be provided by a stiff tube attached to the distal end of the flexible tube. The stiff tube may comprise a ceramic (e.g fused silica) and/or a metal. A kit comprising the catheter and a guide tube is also described. Methods of catheter implantation are also outlined.
    Type: Application
    Filed: February 11, 2009
    Publication date: December 16, 2010
    Applicant: RENISHAW (IRELAND) LIMITED
    Inventors: Hugo George Derrick, Mathew David Frederick Stratton, Paul David Fielder