Patents by Inventor David Walsh

David Walsh 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).

  • Multi-tenant service management in a VoIP network
    Patent number: 8509226
    Abstract: A system and method for aggregating services within a VoIP network. The VoIP network comprises a plurality of vendors, resellers, and users, and each reseller aggregates a plurality of services from the vendors and other resellers. Each type of service may be organized into two or more tiers, with each tier including one or more services. Each tier is presented to downstream users as a single price and is re-branded with the reseller's branding elements. Downstream users can select a desired service from a given tier, and the tier may automatically select a service that maximizes the profit for the reseller.
    Type: Grant
    Filed: August 31, 2012
    Date of Patent: August 13, 2013
    Assignee: Orisha Holdings, L.L.C.
    Inventors: Chris Murphy, Eric Maginniss, David Walsh, Evin Hunt
  • Process to prepare treprostinil, the active ingredient in Remodulin®
    Patent number: 8497393
    Abstract: This present invention relates to an improved process to prepare prostacyclin derivatives. One embodiment provides for an improved process to convert benzindene triol to treprostinil via salts of treprostinil and to purify treprostinil.
    Type: Grant
    Filed: July 13, 2012
    Date of Patent: July 30, 2013
    Assignee: United Therapeutics Corporation
    Inventors: Hitesh Batra, Sudersan M. Tuladhar, Raju Penmasta, David A. Walsh
  • Treprostinil production
    Patent number: 8481782
    Abstract: The present invention is directed to a novel method for preparing a synthetic intermediate for treprostinil via a stereoselective alkyne addition reaction. Also described are methods of preparing treprostinil comprising the alkyne addition reaction described herein as well as novel intermediates useful for synthesis prostacyclin derivatives, such as treprostinil.
    Type: Grant
    Filed: June 2, 2011
    Date of Patent: July 9, 2013
    Assignee: United Therapeutics Corporation
    Inventors: Hitesh Batra, Raju Penmasta, Vijay Sharma, Sudersan M. Tuladhar, David A. Walsh
  • GRIPPING AID
    Publication number: 20130112577
    Abstract: A wearable aid for gripping an item by hand includes a main body shaped to be worn by a user, a strap connected to a first location of the main body and a releasable retaining means at a second location of the main body that is away from the first location. When a user wearing the aid has engaged an item to be gripped, part of the strap can be passed over at least part of one or more fingers of the user's hand and secured to the releasable retaining means in a manner that aids the user in gripping the item.
    Type: Application
    Filed: June 11, 2011
    Publication date: May 9, 2013
    Inventor: Stuart David Walsh
  • Dynamic Rod Assembly
    Publication number: 20130090690
    Abstract: A dynamic rod assembly, such as that used for spinal stabilization, made of a number of interlocking segments whereby a limited amount of relative motion is permitted between each pair of adjacent segments. The dynamic rod assembly may also incorporate a separate central element that extends at least partially through a central channel within the interlocking segments to prevent the interlocking segments from disengaging while adding to the desired bending properties of the dynamic rod assembly.
    Type: Application
    Filed: September 12, 2012
    Publication date: April 11, 2013
    Inventor: David A. Walsh
  • Treprostinil formulation
    Patent number: 8350079
    Abstract: There is provided a stable monohydrate form of treprostinil and pharmaceutical formulation comprising the same, method of making and using the same.
    Type: Grant
    Filed: May 7, 2009
    Date of Patent: January 8, 2013
    Assignee: United Therapeutics Corporation
    Inventor: David A. Walsh
  • PROCESS TO PREPARE TREPROSTINIL, THE ACTIVE INGREDIENT IN REMODULIN®
    Publication number: 20120283470
    Abstract: This present invention relates to an improved process to prepare prostacyclin derivatives. One embodiment provides for an improved process to convert benzindene triol to treprostinil via salts of treprostinil and to purify treprostinil.
    Type: Application
    Filed: July 13, 2012
    Publication date: November 8, 2012
    Inventors: Hitesh Batra, Sudersan M. Tuladhar, Raju Penmasta, David A. Walsh
  • Process to prepare treprostinil, the active ingredient in remodulin
    Patent number: 8242305
    Abstract: This present invention relates to an improved process to prepare prostacyclin derivatives. One embodiment provides for an improved process to convert benzindene triol to treprostinil via salts of treprostinil and to purify treprostinil.
    Type: Grant
    Filed: December 15, 2008
    Date of Patent: August 14, 2012
    Assignee: United Therapeutics Corporation
    Inventors: Hitesh Batra, Sudersan M. Tuladhar, Raju Penmasta, David A. Walsh
  • TREPROSTINIL PRODUCTION
    Publication number: 20120197041
    Abstract: The present invention is directed to a novel method for preparing a synthetic intermediates for treprostinil. Also described are methods of preparing treprostinil comprising utilizing novel intermediates described herein as well as novel intermediates useful for synthesis prostacyclin derivatives, such as treprostinil.
    Type: Application
    Filed: March 30, 2012
    Publication date: August 2, 2012
    Inventors: Hitesh BATRA, Raju PENMASTA, Vijay SHARMA, Sudersan M. TULADHAR, David A. WALSH
  • TREPROSTINIL PRODUCTION
    Publication number: 20120190888
    Abstract: The present invention is directed to a novel method for preparing a synthetic intermediates for treprostinil. Also described are methods of preparing treprostinil comprising utilizing novel intermediates described herein as well as novel intermediates useful for synthesis prostacyclin derivatives, such as treprostinil.
    Type: Application
    Filed: March 30, 2012
    Publication date: July 26, 2012
    Inventors: Hitesh Batra, Raju Penmasta, Vijay Sharma, Sudersan M. Tuladhar, David A. Walsh
  • AUTOMATED DOCUMENT GOVERNANCE
    Publication number: 20120110434
    Abstract: A method, system, and computer usable program product for automated document governance in a data processing environment are provided in the illustrative embodiments. A set of structured documents is received at an application executing in a computer in the data processing environment. A structure is recognized, parts of which structure are present in the documents in the set. A set of similarities in the documents in the set is summarized according to the recognized structure. A summarized information from the summarizing is presented such that a document governance action can be performed on a subset of the set of documents using the summarized information.
    Type: Application
    Filed: October 29, 2010
    Publication date: May 3, 2012
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Ramakrishna Janardhana Gorthi, Oriana Jeannette Love, David Walsh Palmieri, Jeffrey Tobias Robke
  • Locking mechanism with two-piece washer
    Patent number: 8157846
    Abstract: Locking mechanisms and methods of fixation, such as the fixation of a fixation device like a bone screw and of a rod to the spine. The locking mechanism includes a body, a rod seat and a set screw. The rod seat is configured to separate into two pieces when the rod exerts force on the top portion of the washer and the set screw limits movement of the washer toward the bottom of the locking mechanism.
    Type: Grant
    Filed: July 24, 2008
    Date of Patent: April 17, 2012
    Assignee: Ingenium S.A.
    Inventors: David S. Randol, David A. Walsh
  • TREPROSTINIL PRODUCTION
    Publication number: 20110319641
    Abstract: The present invention is directed to a novel method for preparing a synthetic intermediate for treprostinil via a stereoselective alkyne addition reaction. Also described are methods of preparing treprostinil comprising the alkyne addition reaction described herein as well as novel intermediates useful for synthesis prostacyclin derivatives, such as treprostinil.
    Type: Application
    Filed: June 2, 2011
    Publication date: December 29, 2011
    Inventors: Hitesh Batra, Raju Penmasta, Vijay Sharma, Sudersan M. Tuladhar, David A. Walsh
  • SPINAL FIXATION ASSEMBLY WITH INTERMEDIATE ELEMENT
    Publication number: 20110196430
    Abstract: A novel locking mechanism including a body and intermediate element and a method for locking the relative positions of a rod and a screw. The intermediate element is adapted to receive a rod and a head of a screw and is located between the rod and the head of the screw. The intermediate element has a non-circular shape such that at least one large non-contact area exists when the intermediate element is in contact with the head of the screw and the locking mechanism is fully engaged. The body is adapted to maintain the orientation of the non-circular intermediate element with respect to the body. The body also has at least one structure defining at least one distinct temporary stopping point for the intermediate element above the final locking position.
    Type: Application
    Filed: February 10, 2010
    Publication date: August 11, 2011
    Inventors: David A. Walsh, David S. Randol
  • Parametric generation using intersecting cavities
    Patent number: 7768695
    Abstract: A parametric device having a non-linear material (4) for generating an idler wave and a signal wave (16) in response to a pump wave (14), the pump, idler and signal waves being non-collinear, the device having a cavity (10, 11) resonant at the pump wavelength and means for varying the angle between the propagation directions of the pump and idler waves.
    Type: Grant
    Filed: January 26, 2007
    Date of Patent: August 3, 2010
    Assignee: The University Court of the University of St. Andrews
    Inventors: Malcolm H. Dunn, Cameron F. Rae, Tom J. Edwards, David J. M. Stothard, David Walsh
  • SPINAL FIXATION ASSEMBLY
    Publication number: 20100160980
    Abstract: A locking mechanism (100) and method of fixation, such as the fixation of a fixation device (104) like a bone screw and of a rod (106) to the spine. The locking mechanism (100) includes a body (102), an insert (108, 308), a rod seat (110, 310) and a set screw. The body (102) includes a bottom portion (114) configured to receive the fixation device (104) and the insert (108, 308) but prevents the insert (108, 308) and fixation device (104) from passing therethrough once the insert (108, 308) and fixation device (104) are engaged. The body (102) further includes a side portion (120) configured to receive the rod (106). Between the rod (106) and the insert (108, 308) is a rod seat (110, 310).
    Type: Application
    Filed: July 26, 2007
    Publication date: June 24, 2010
    Inventors: David A. Walsh, Karl Arthur Knobloch, Daniel R. Baker
  • SPINAL FIXATION ASSEMBLY
    Publication number: 20100152787
    Abstract: A locking mechanism (100) and method of fixation, such as the fixation of a fixation device (104) like a bone screw and of a rod (106) to the spine. The locking mechanism (100) includes a body (102), an insert (108, 308), a rod seat (110, 310) and a set screw. The body (102) includes a bottom portion (114) configured to receive the fixation device (104) and the insert (108, 308) but prevents the insert (108, 308) and fixation device (104) from passing therethrough once the insert (108, 308) and fixation device (104) are engaged. The body (102) further includes a side portion (120) configured to receive the rod (106). Between the rod (106) and the insert (108, 308) is a rod seat (110, 310).
    Type: Application
    Filed: July 26, 2007
    Publication date: June 17, 2010
    Applicant: Biotechni America Spine Group, Inc.
    Inventors: David A. Walsh, Carl Arthur Knobloch, Daniel R. Baker
  • LOCKING MECHANISM WITH TWO-PIECE WASHER
    Publication number: 20100023061
    Abstract: Locking mechanisms and methods of fixation, such as the fixation of a fixation device like a bone screw and of a rod to the spine. The locking mechanism includes a body, a rod seat and a set screw. The rod seat is configured to separate into two pieces when the rod exerts force on the top portion of the washer and the set screw limits movement of the washer toward the bottom of the locking mechanism.
    Type: Application
    Filed: July 24, 2008
    Publication date: January 28, 2010
    Inventors: David S. Randol, David A. Walsh
  • Coating for optimising output coupling of em radiation
    Patent number: 7626756
    Abstract: A coating between a nonlinear crystal and a silicon prism coupler, prevents transmission of radiation scattered within the crystal by filtering out frequencies outside the silicon bandgap to avoid free carrier absorption, but transmits THz frequencies that correspond to the bandgap.
    Type: Grant
    Filed: January 26, 2007
    Date of Patent: December 1, 2009
    Assignee: The University Court of the University of St. Andrews
    Inventors: Malcolm Dunn, Cameron F. Rae, Tom J. Edwards, David J. M. Stothard, David Walsh
  • Vacuum cleaner
    Patent number: D620210
    Type: Grant
    Filed: July 9, 2009
    Date of Patent: July 20, 2010
    Assignee: Goodway Technologies Corporation
    Inventors: Joseph J Franzino, David Walsh