Patents by Inventor Arnold Keller

Arnold Keller 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).

  • Publication number: 20180221842
    Abstract: The present invention relates to a multi-stage, single reactor and system for making methanol for synthesis gas (syngas). In particular, the reactor contains a shell and tube reactor that is divided at its top and bottom heads into a plurality vertical, isolated compartments. The associated compartments and tubes form a stage of the reactor. The raw syngas is fed to the first stage, and unreacted syngas from the first stage is fed to the second stage subsequent stages. Between each stage, the product, methanol and water, is removed from the reaction mixture before sending the unreacted syngas to the subsequent stage. The reactor allows for high conversion of synthesis gas to methanol in a once-through process, without requiring recycling of unreacted synthesis gas.
    Type: Application
    Filed: August 9, 2016
    Publication date: August 9, 2018
    Inventors: Eli GAL, Robert M. KOROS, Benjamin MOSKOWITZ, Arnold KELLER
  • Patent number: 9681958
    Abstract: An endoprosthesis for replacing the ankle joint includes a lower component which is configured to be connected to the ankle bone, an upper component which is configured to be connected to the shin bone, and an intermediate part which forms a slide joint both with the lower and upper components. The intermediate part, which is wedge-shaped in sagittal section, is provided in order to compensate for anatomical or surgical irregularities. The upper component can also be wedge-shaped in frontal or sagittal section.
    Type: Grant
    Filed: November 25, 2013
    Date of Patent: June 20, 2017
    Assignee: Stryker European Holdings I, LLC
    Inventors: Hakon Kofoed, Arnold Keller, Helmut D. Link
  • Patent number: 9675730
    Abstract: The invention relates to a joint prosthesis having a shaft made from a titanium alloy, in which at least the shaft is investment cast and has a body-centered cubic crystal structure. A titanium alloy having this crystal structure (known as ?-titanium alloy) has an advantageously low modulus of elasticity which is well matched to the physiological demands of joint prostheses. Furthermore, implementation as a shaped casting allows a complex shape to be achieved. It is particularly embodied as a femoral prosthesis for an artificial hip joint, which has an elongate shaft with grooves and sawtooth-like projections for bone anchoring.
    Type: Grant
    Filed: March 8, 2006
    Date of Patent: June 13, 2017
    Assignee: Waldemar Link GmbH & Co. KG
    Inventors: Sevki Baliktay, Arnold Keller
  • Patent number: 9138323
    Abstract: A finger joint prosthesis is provided including a joint body having first and second joint elements, which are connected together pivotably about a rotary axis and from each of which extends an anchoring bar for fixing to a proximal and/or distal phalanx. The anchoring bars have eyes with openings for receiving fixing screws. To increase stability, it is proposed that the first joint element have an external hollow body with an insertion opening, that the second joint element have an internal hollow body, and that the internal hollow body in the position of installation can be inserted by way of the insertion opening relatively movably into the external hollow body. A spindle can be inserted in the position of installation into the internal hollow body for rotationally movable connection to the external hollow body.
    Type: Grant
    Filed: February 21, 2008
    Date of Patent: September 22, 2015
    Assignee: Waldemar Link GmbH & Co. KG
    Inventors: Arnold Keller, Christoph Ranft
  • Patent number: 9103584
    Abstract: An energy-efficient method of recovering carbon dioxide (CO2) in a liquid state from a high-pressure gas stream is provided. The method includes cooling, condensing, and/or separating CO2 from a high-pressure gas stream and further purifying the resulting liquid CO2 in a purification zone to thereby provide a purified CO2 product. The purified liquid CO2 product may then be pumped to a higher pressure for further utilization and/or sequestration for industrial or environmental purposes.
    Type: Grant
    Filed: October 14, 2013
    Date of Patent: August 11, 2015
    Inventor: Arnold Keller
  • Patent number: 9072504
    Abstract: A bone spreader includes two tubular pin holders which are connected to one another by a parallel guide system, and two pins that are configured to be connected to the bone parts that are to be spread apart. In order to give the bone parts that are to be spread apart a more secure position in relation to one another, at least one of the pin holders is provided with a locking device for a pin located in the pin holder. This locking device includes a locking finger which is movable tangentially with respect to the pin holder and which, in the locking position, engages in a transverse groove of the associated pin and can be formed by a pivotably mounted hook.
    Type: Grant
    Filed: February 28, 2011
    Date of Patent: July 7, 2015
    Assignee: Cervitech, Inc.
    Inventor: Arnold Keller
  • Publication number: 20140336767
    Abstract: An intervertebral prosthesis, in particular for the cervical spine, has two attachment plates connected in an articulated manner. The attachment surfaces of the attachment plates, which are configured for attachment to adjacent vertebral bodies have a base surface configured to bear on the surface of the vertebral bodies, and self-tapping fixing projections rising from the base surface. These fixing projections are formed by at least one pair of ribs which extend in opposite directions obliquely with respect to a predetermined implantation direction and whose side faces oriented more away from the implantation direction are steeper than their side faces oriented more in the implantation direction. The ribs can be toothed.
    Type: Application
    Filed: May 13, 2014
    Publication date: November 13, 2014
    Applicant: Cervitech, Inc.
    Inventor: Arnold Keller
  • Patent number: 8721725
    Abstract: An intervertebral prosthesis, in particular for the cervical spine, has two attachment plates connected in an articulated manner. The attachment surfaces of the attachment plates, which are configured for attachment to adjacent vertebral bodies have a base surface configured to bear on the surface of the vertebral bodies, and self-tapping fixing projections rising from the base surface. These fixing projections are formed by at least one pair of ribs which extend in opposite directions obliquely with respect to a predetermined implantation direction and whose side faces oriented more away from the implantation direction are steeper than their side faces oriented more in the implantation direction. The ribs can be toothed.
    Type: Grant
    Filed: April 1, 2010
    Date of Patent: May 13, 2014
    Assignee: Cervitech, Inc.
    Inventor: Arnold Keller
  • Publication number: 20140081413
    Abstract: An endoprosthesis for replacing the ankle joint includes a lower component which is configured to be connected to the ankle bone, an upper component which is configured to be connected to the shin bone, and an intermediate part which forms a slide joint both with the lower and upper components. The intermediate part, which is wedge-shaped in sagittal section, is provided in order to compensate for anatomical or surgical irregularities. The upper component can also be wedge-shaped in frontal or sagittal section.
    Type: Application
    Filed: November 25, 2013
    Publication date: March 20, 2014
    Applicant: LINK AMERICA, INC.
    Inventors: Hakon Kofoed, Arnold Keller, Helmut D. Link
  • Publication number: 20140041412
    Abstract: An energy-efficient method of recovering carbon dioxide (CO2) in a liquid state from a high-pressure gas stream is provided. The method includes cooling, condensing, and/or separating CO2 from a high-pressure gas stream and further purifying the resulting liquid CO2 in a purification zone to thereby provide a purified CO2 product. The purified liquid CO2 product may then be pumped to a higher pressure for further utilization and/or sequestration for industrial or environmental purposes.
    Type: Application
    Filed: October 14, 2013
    Publication date: February 13, 2014
    Inventor: Arnold Keller
  • Patent number: 8591586
    Abstract: An intervertebral disc prosthesis having two cover plates and a prosthesis core that extends to the circumferential edge of the cover plates. The prosthesis core is mounted to the lower cover plate and forms a spherical sliding surface with the upper cover plate. The connection surface of the cover plates may be set back from the circumferential perimeter of the cover plates to provide an optimum size of the spherical sliding surface despite the set-back nature of the connection surface. The set-back is configured as an inclined transition surface that adjoins the connection surface to the circumferential edge. The set-back allows the intervertebral disc prosthesis to be fully inserted into the prepared disc space into the spared dorsolateral corners without protruding ventrally.
    Type: Grant
    Filed: April 3, 2012
    Date of Patent: November 26, 2013
    Assignee: Cervitech, Inc.
    Inventors: Helmut D. Link, Arnold Keller, Paul C. McAfee
  • Patent number: 8591595
    Abstract: An endoprosthesis for replacing the ankle joint includes a lower component which is configured to be connected to the ankle bone, an upper component which is configured to be connected to the shin bone, and an intermediate part which forms a slide joint both with the lower and upper components. The intermediate part, which is wedge-shaped in sagittal section, is provided in order to compensate for anatomical or surgical irregularities. The upper component can also be wedge-shaped in frontal or sagittal section.
    Type: Grant
    Filed: April 6, 2010
    Date of Patent: November 26, 2013
    Assignee: Link America, Inc.
    Inventors: Hakon Kofoed, Arnold Keller, Helmut D. Link
  • Patent number: 8585802
    Abstract: An energy-efficient method of recovering carbon dioxide (CO2) in a high-pressure liquid state from a high-pressure gas stream. The method includes cooling, condensing, and/or separating CO2 from a high-pressure gas stream in two or more separation zones and further purifying the resulting sub-critical pressure liquid CO2 streams in a third purification zone to thereby provide purified CO2. The purified liquid CO2 may be pumped to above the critical pressure for further utilization and/or sequestration for industrial or environmental purposes.
    Type: Grant
    Filed: July 7, 2011
    Date of Patent: November 19, 2013
    Inventor: Arnold Keller
  • Patent number: 8409285
    Abstract: A prosthesis for partial replacement of a vertebral body includes upper and lower contact plates that contact upper and lower vertebral bodies and a bridging element to be inserted into a bone cavity that bridges an intermediate vertebral body to be replaced that lies between the upper and lower vertebral bodies. The bridging element has anchoring projections which can be moved between a retracted implantation position and a protruding anchoring position.
    Type: Grant
    Filed: November 14, 2011
    Date of Patent: April 2, 2013
    Assignee: Cervitech, Inc.
    Inventor: Arnold Keller
  • Patent number: 8361077
    Abstract: An insertion instrument comprising an elongate shaft, a suction head provided at the front end thereof for connection to a joint socket, a suction device with a piston guided in the shaft, a suction line opening out at the suction head, and an actuating element which is guided along a guiding track on the shaft. The guiding track can be helically shaped and have a locking arrangement, preferably in the form of a recess, for the actuating element in a suction position. Due to the helical shape of the guiding track, the actuating element executes a rotational and longitudinal movement during its displacement. The longitudinal movement produces a negative pressure in the suction line ensuring maintenance of the pressure, while the rotating movement causes rotation of the actuating element such that it reaches its locking position at the end of the guiding track, providing simplified handling of the instrument.
    Type: Grant
    Filed: June 26, 2007
    Date of Patent: January 29, 2013
    Inventor: Arnold Keller
  • Patent number: 8303661
    Abstract: System of intervertebral disc prostheses which includes standard prostheses and corrective prostheses. The corrective prostheses serve to compensate for a ventro-dorsal offset. They are characterized in that, on one of their cover plates, the surface via which it cooperates in a matching manner with the prosthesis core is offset ventrodorsally relative to the contact surface by comparison with the standard prostheses.
    Type: Grant
    Filed: November 7, 2007
    Date of Patent: November 6, 2012
    Assignee: DePuy Spine, Inc.
    Inventor: Arnold Keller
  • Publication number: 20120191198
    Abstract: An intervertebral disc prosthesis having two cover plates and a prosthesis core that extends to the circumferential edge of the cover plates. The prosthesis core is mounted to the lower cover plate and forms a spherical sliding surface with the upper cover plate. The connection surface of the cover plates may be set back from the circumferential perimeter of the cover plates to provide an optimum size of the spherical sliding surface despite the set-back nature of the connection surface. The set-back is configured as an inclined transition surface that adjoins the connection surface to the circumferential edge. The set-back allows the intervertebral disc prosthesis to be fully inserted into the prepared disc space into the spared dorsolateral corners without protruding ventrally.
    Type: Application
    Filed: April 3, 2012
    Publication date: July 26, 2012
    Inventors: Helmut D. Link, Arnold Keller, Paul C. McAfee
  • Patent number: 8192493
    Abstract: A prosthesis for the partial replacement of a vertebral body includes an upper contact plate for connection to an upper vertebral body, a lower contact plate for connection to a lower vertebral body and a bridging part which connects the upper and lower contact plates to one another and bridges at least one intermediate vertebral body which is located between the upper and lower vertebral bodies and is to be partially replaced. The bridging part is accommodated in a recess in the vertebral body and is secured in the recess with lateral anchoring projections which penetrate into the bone substance located on both sides of the bridging part. The cross section of the bridging part may narrow toward the rear, preferably in a trapezoid shape.
    Type: Grant
    Filed: January 7, 2010
    Date of Patent: June 5, 2012
    Assignee: Cervitech, Inc.
    Inventor: Arnold Keller
  • Patent number: 8157808
    Abstract: The invention relates to an insertion instrument for an endoprosthesis (1), which comprises a neck part (12) and a shaft part (10) which is to be inserted into a medullary cavity, comprising a clamping device (2) which is provided with a holding fork (25) and a thrust bearing (26), which are embodied in such a manner that the endoprosthesis (1) is held fixedly in a clamped state and is released in an unclamped state, in addition to a striker device (3). The aim of the invention is to simplify the safe and precise insertion thereof such that a guide rail (23) for a striker element is arranged in a fixed manner on the clamping device (2) and is oriented in such a manner that a path, which is determined by the guide rail, leads to an end face of the endoprosthesis (1) which is held in the clamping device (2).
    Type: Grant
    Filed: September 6, 2006
    Date of Patent: April 17, 2012
    Assignee: Waldemar Link GmbH & Co. KG
    Inventor: Arnold Keller
  • Publication number: 20120083891
    Abstract: A spinal implant includes two connection plates dimensioned for connection to adjacent vertebral bodies and a hinge core. The hinge core together with one connection plate forms a hinge between a generally spherical hinge extending from the one connection plate into an opening of a generally spherical depression in the hinge core. The opening is dimensioned to be elastically deformed to allow passage of the generally spherical hinge into the generally spherical depression. The hinge core bears on a slide surface which extends substantially parallel to the direction of the other connection plate and permits relative translatory movement of the hinge core. The walled receiving area limits this relative translatory movement of the hinge core. The stability of the spinal implant with respect to laterally incident forces is increased.
    Type: Application
    Filed: December 15, 2011
    Publication date: April 5, 2012
    Applicant: CERVITECH, INC.
    Inventor: Arnold Keller