Patents by Inventor Alfred Litwak

Alfred Litwak 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: 20220411193
    Abstract: An orthopedic screw extractor device including a shaft, an end portion about a first end of the shaft for securing to a handle, and a screw extracting tip about a second end of the shaft opposite the first end. The screw extracting tip further includes a generally frustoconical shape having a side at an angle of about 5 to 15 degrees relative to a longitudinal axis of the screw extracting tip. The screw extracting tip further includes first, second and third screw threads and first, second and third flutes circumferentially spaced about the screw extracting tip and extending across an entire length of the screw extracting tip. Each of the screw threads has a lead of about 0.07 to 0.12 inches, a pitch of about 0.02 to 0.04 inches, a thread angle of about 40 to 50 degrees, and a depth of about 0.01 to 0.02 inches.
    Type: Application
    Filed: August 29, 2022
    Publication date: December 29, 2022
    Applicant: Shukla Medical
    Inventors: Subramanya Naglapura, Alfred Litwak
  • Patent number: 11426226
    Abstract: An orthopedic screw extractor device including a shaft, an end portion about a first end of the shaft for securing to a handle, and a screw extracting tip about a second end of the shaft opposite the first end. The screw extracting tip further includes a generally frustoconical shape having a side at an angle of about 5 to 15 degrees relative to a longitudinal axis of the screw extracting tip. The screw extracting tip further includes first, second and third screw threads and first, second and third flutes circumferentially spaced about the screw extracting tip and extending across an entire length of the screw extracting tip. Each of the screw threads has a lead of about 0.07 to 0.12 inches, a pitch of about 0.02 to 0.04 inches, a thread angle of about 40 to 50 degrees, and a depth of about 0.01 to 0.02 inches.
    Type: Grant
    Filed: November 4, 2019
    Date of Patent: August 30, 2022
    Assignee: Shukla Medical
    Inventors: Subramanya Naglapura, Alfred Litwak
  • Publication number: 20200060745
    Abstract: An orthopedic screw extractor device including a shaft, an end portion about a first end of the shaft for securing to a handle, and a screw extracting tip about a second end of the shaft opposite the first end. The screw extracting tip further includes a generally frustoconical shape having a side at an angle of about 5 to 15 degrees relative to a longitudinal axis of the screw extracting tip. The screw extracting tip further includes first, second and third screw threads and first, second and third flutes circumferentially spaced about the screw extracting tip and extending across an entire length of the screw extracting tip. Each of the screw threads has a lead of about 0.07 to 0.12 inches, a pitch of about 0.02 to 0.04 inches, a thread angle of about 40 to 50 degrees, and a depth of about 0.01 to 0.02 inches.
    Type: Application
    Filed: November 4, 2019
    Publication date: February 27, 2020
    Applicant: Shukla Medical
    Inventors: Subramanya Naglapura, Alfred Litwak
  • Patent number: 10463414
    Abstract: An orthopedic screw extractor device including a shaft, an end portion about a first end of the shaft for securing to a handle, and a screw extracting tip about a second end of the shaft opposite the first end. The screw extracting tip further includes a generally frustoconical shape having a side at an angle of about 5 to 15 degrees relative to a longitudinal axis of the screw extracting tip. The screw extracting tip further includes first, second and third screw threads and first, second and third flutes circumferentially spaced about the screw extracting tip and extending across an entire length of the screw extracting tip. Each of the screw threads has a lead of about 0.07 to 0.12 inches, a pitch of about 0.02 to 0.04 inches, a thread angle of about 40 to 50 degrees, and a depth of about 0.01 to 0.02 inches.
    Type: Grant
    Filed: May 2, 2017
    Date of Patent: November 5, 2019
    Assignee: Shukla Medical
    Inventors: Subramanya Naglapura, Alfred Litwak
  • Publication number: 20170312001
    Abstract: An orthopedic screw extractor device including a shaft, an end portion about a first end of the shaft for securing to a handle, and a screw extracting tip about a second end of the shaft opposite the first end. The screw extracting tip further includes a generally frustoconical shape having a side at an angle of about 5 to 15 degrees relative to a longitudinal axis of the screw extracting tip. The screw extracting tip further includes first, second and third screw threads and first, second and third flutes circumferentially spaced about the screw extracting tip and extending across an entire length of the screw extracting tip. Each of the screw threads has a lead of about 0.07 to 0.12 inches, a pitch of about 0.02 to 0.04 inches, a thread angle of about 40 to 50 degrees, and a depth of about 0.01 to 0.02 inches.
    Type: Application
    Filed: May 2, 2017
    Publication date: November 2, 2017
    Applicant: Shukla Medical
    Inventors: Subramanya Naglapura, Alfred Litwak
  • Publication number: 20050113930
    Abstract: A bone graft that is made at least partially of synthetic material or demineralized bone matrix and is manufactured in suitable shape and/or dimensions to augment an alveolar ridge. The bone graft may be such as to augment both a portion of the crest of the alveolar ridge and a portion of at least one side of the alveolar ridge. The graft may include at least one hole for the intended position of an implant base, and/or at least one hole for attachment hardware. The graft may be manufactured to standard dimensions or it may be manufactured to patient-unique dimensions which may be determined radiographically prior to surgery and prior to manufacturing of the bone graft. The bone graft may be able to be carved for dimensional adjustment during surgery. The bone graft may have composition and/or local geometry which varies from one place to another, and may have a particular composition and/or local geometry at places intended to adjoin natural bone.
    Type: Application
    Filed: February 26, 2004
    Publication date: May 26, 2005
    Applicant: Therics, Inc.
    Inventors: Scott Ganz, Roger Stikeleather, Thomas Bradbury, Alfred Litwak
  • Publication number: 20050061241
    Abstract: The invention includes a three-dimensional printing (3DP) machine that has at least one ultraviolet (UV) light source directed at powder or slurry being processed by the 3DP machine and/or directed at any of various surfaces or machine components, in a manner suitable to kill or damage microorganisms to a desired extent. The UV light sources may be either stationary or movable, and may be either pulsed or substantially continuous, and may operate in any desired sequence and timing with respect to other operations performed by the machine. The invention may include ultraviolet illumination in such a way as to interact with powder to sterilize or disinfect powder either while the powder is stationary or, alternatively, as powder is being moved from one place to another within the 3DP machine, or both. The invention also includes methods of performing three-dimensional printing using such illumination.
    Type: Application
    Filed: July 14, 2004
    Publication date: March 24, 2005
    Applicant: Therics, Inc.
    Inventors: Thomas West, Qing Liu, Peter Materna, Alfred Litwak, Christopher Gaylo
  • Patent number: 5092572
    Abstract: A vise for clamping and firmly holding allograph in place includes three adjustments which are accessible to the operating room staff from and within the sterile surgical field. The first adjustment includes a clamp to clamp the invention onto the standard operating room table. This first adjustment includes a clamp tightening handle and pivoting underside clamping surface which enables the vise to be mounted onto the operating table and secured onto the table by manipulations from above the surface of the operating room table and therefore, within the sterile field. The second adjustment includes an additional adjusting handle for angularly positioning the vise grip. The third adjustment includes another adjusting handle for opening and closing the vise. A variety of special purpose face plates for the two elements of the vise are provided to accommodate different surgical requirements. These face plates are removably inserted into the elements of the vise.
    Type: Grant
    Filed: October 5, 1990
    Date of Patent: March 3, 1992
    Assignee: Anstat, Inc.
    Inventors: Alfred A. Litwak, Alfred A. Litwak
  • Patent number: 4863473
    Abstract: A prosthesis for replacing bone extracted from a cadaver. A preferred prosthesis is formed of two tubes of differing diameter, the larger-diameter tube beng slidable over the smaller-diameter tube to provide a telescoping assembly. A stop is provided on the smaller tube, and is adjustably positioned thereon for operatively contacting an end of the larger tube to resist contraction of the assembly after insertion within a cadaver. Threaded pins are provided at the ends of the assembly for engagement within bone of a skeleton of the cadaver. The prosthesis retains the physical appearance of a cadaver after extraction of bone for use in surgical and other therapeutic purposes on living organisms.
    Type: Grant
    Filed: April 6, 1988
    Date of Patent: September 5, 1989
    Assignee: Osteotech, Inc.
    Inventors: Frank P. Glowczewskie, Jr., Alfred A. Litwak, Jamie M. Grooms, John W. Lyle
  • Patent number: 4552306
    Abstract: The present invention is directed to a drinking fountain device for substantially horizontal mounting, especially for mounting in a countertop adjacent to a sink. It is also directed to the combination of a sink and the mentioned drinking fountain device. In particular, the drinking fountain device is mounted substantially flush to the surface so that its working parts are mostly below the horizontal surface of mounting. This eliminates the possibility of the drinking fountain becoming an obstruction. The fountain itself operates by a push button mechanism. Optionally, a faceplate may be fitted onto one embodiment of the fountain device of the present invention so as to channel runoff into a sink. Alternatively, the bracket of the drinking fountain device of the present invention may be fashioned so as to have a top surface built-in faceplate.
    Type: Grant
    Filed: October 26, 1982
    Date of Patent: November 12, 1985
    Inventors: Alfred A. Litwak, Laurene H. O'Donnell
  • Patent number: D794188
    Type: Grant
    Filed: May 2, 2016
    Date of Patent: August 8, 2017
    Assignee: Shukla Medical
    Inventors: Subramanya Naglapura, Alfred Litwak