Patents by Inventor Asit Shah

Asit Shah 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: 9788955
    Abstract: A knee replacement prosthesis comprising a femoral component and a tibial component that enable anterior-posterior translation of the femur relative to the tibia and enable the tibia to rotate about its longitudinal axis during flexion of the knee. The femoral component connects to the distal end of a resected femur and includes medial and lateral condyles having distal, articulating surfaces, and a patellar flange having a patellar articulating surface. The tibial component connects to the proximal end of a resected tibia and includes a proximal bearing surface with medial and lateral concavities that articulate with the medial and lateral condyles. The condylar articulating surfaces and the said concavities are substantially defined by non-uniform, rational B-spline surfaces (NURBS).
    Type: Grant
    Filed: February 18, 2009
    Date of Patent: October 17, 2017
    Assignee: Maxx Orthopedics, Inc.
    Inventors: Asit Shah, Murali Jasti
  • Publication number: 20130123931
    Abstract: A knee revision prosthesis that provides decreasing valgus-varus and medial-lateral restraint as the knee rotates from extension to flexion, and then increasing restraint as the knee rotates from flexion to full extension. The prosthesis includes a femoral component and a tibial component. The femoral component includes a guide box fixed to the femoral mounting surfaces intermediate the condyles. The tibial component includes a central post fixed intermediate the tibial concavities, which articulates within the guide box and constrains rotational movement of the femoral and tibial components relative to one another in the coronal plane and transverse planes. The post and guide box are constructed and arranged to provide progressively decreasing and then progressively increasing rotational constraint of the femoral component in the coronal and transverse planes as the femoral component rotates in the sagittal plane between full extension to a position in flexion, and then back to full flexion, respectively.
    Type: Application
    Filed: November 14, 2011
    Publication date: May 16, 2013
    Applicant: MAXX ORTHOPEDICS, INC.
    Inventors: Asit Shah, Corey Anthony Perine
  • Patent number: 8337564
    Abstract: A knee replacement prosthesis comprising a femoral component and a tibial component that enable anterior-posterior translation of the femur relative to the tibia and enable the tibia to rotate about its longitudinal axis during flexion of the knee. The femoral component connects to the distal end of a resected femur and includes medial and lateral condyles having distal, articulating surfaces, and a patellar flange having a patellar articulating surface. The tibial component connects to the proximal end of a resected tibia and includes a proximal bearing surface with medial and lateral concavities that articulate with the medial and lateral condyles. The articulating surfaces of the condyles and concavities are defined by sections of toroids.
    Type: Grant
    Filed: February 18, 2009
    Date of Patent: December 25, 2012
    Assignee: Maxx Orthopedics, Inc.
    Inventors: Asit Shah, Murali Jasti
  • Publication number: 20100292705
    Abstract: A posterior-referencing apparatus for sizing the resected distal femur prior to implanting the femoral component of a total knee prosthesis. The apparatus can be used for sizing either the left or right femur. The apparatus has a first operable orientation adapted for sizing the left femur and a second operable orientation offset 180 degrees from the first operable position for sizing the right femur. The apparatus can be reconfigured between left and right orientations quickly and easily without disassembling the apparatus.
    Type: Application
    Filed: May 13, 2009
    Publication date: November 18, 2010
    Applicant: MAXX ORTHOPEDICS, INC.
    Inventor: Asit Shah
  • Publication number: 20100057088
    Abstract: An apparatus for resecting the distal face of either the left or right femur at a predetermined valgus angle relative to the patient's intramedullary canal prior to implanting the femoral component of a total knee prosthesis. The apparatus has a distal elongate sword having a longitudinal axis and being adapted for insertion into the intramedullary canal of the femur. A proximal handle is connected to and has a longitudinal axis coaxial with the sword. A base cartridge is fixed intermediate the sword and handle and has an axial passage extending therethrough. A face plate is fixed at the distal end of the base cartridge and is adapted to abut the face of the natural distal femur. The face plate is oriented at the predetermined valgus angle relative to the longitudinal axis of the sword. A cutting jig connects to the base cartridge.
    Type: Application
    Filed: August 26, 2008
    Publication date: March 4, 2010
    Applicant: Maxx Orthopedics, Inc.
    Inventor: Asit Shah
  • Publication number: 20090319048
    Abstract: A knee replacement prosthesis comprising a femoral component and a tibial component that enable anterior-posterior translation of the femur relative to the tibia and enable the tibia to rotate about its longitudinal axis during flexion of the knee. The femoral component connects to the distal end of a resected femur and includes medial and lateral condyles having distal, articulating surfaces, and a patellar flange having a patellar articulating surface. The tibial component connects to the proximal end of a resected tibia and includes a proximal bearing surface with medial and lateral concavities that articulate with the medial and lateral condyles. The articulating surfaces of the condyles and concavities are defined by sections of toroids.
    Type: Application
    Filed: February 18, 2009
    Publication date: December 24, 2009
    Applicant: MAXX ORTHOPEDICS, INC.
    Inventors: Asit Shah, Murali Jasti
  • Publication number: 20090319049
    Abstract: A knee replacement prosthesis comprising a femoral component and a tibial component that enable anterior-posterior translation of the femur relative to the tibia and enable the tibia to rotate about its longitudinal axis during flexion of the knee. The femoral component connects to the distal end of a resected femur and includes medial and lateral condyles having distal, articulating surfaces, and a patellar flange having a patellar articulating surface. The tibial component connects to the proximal end of a resected tibia and includes a proximal bearing surface with medial and lateral concavities that articulate with the medial and lateral condyles. The condylar articulating surfaces and the said concavities are substantially defined by non-uniform, rational B-spline surfaces (NURBS).
    Type: Application
    Filed: February 18, 2009
    Publication date: December 24, 2009
    Applicant: Maxx Orthopedics, Inc.
    Inventors: Asit Shah, Murali Jasti