Patents by Inventor Robert J. Perlmutter

Robert J. Perlmutter 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).

  • Pyrrolidine Main Protease Inhibitors as Antiviral Agents
    Publication number: 20240158368
    Abstract: Pyrrolidine main protease inhibitors are described that are effective as antiviral compounds.
    Type: Application
    Filed: October 12, 2023
    Publication date: May 16, 2024
    Applicant: AbbVie Inc.
    Inventors: David A. Degoey, Michael R. Schrimpf, David J. Hardee, Jacob Ludwig, Eric R. Miller, Timothy R. Hodges, Alberto Munoz, Sarah J. Perlmutter, Huan-Qiu X. Li, Alvin Jang, Elizabeth L. Noey, Gregory A. Gfesser, Edgars Jecs, Robert G. Schmidt, Justin D. Dietrich, Xenia B. Searle, Boguslaw P. Nocek, Andrew Bogdan
  • MRI apparatus with external magnetic field compensation
    Patent number: 5214383
    Abstract: External field compensation is provided for MRI apparatus which is in a magnetically noisy environment such as that caused by nearby subway trains. By means of a magnetometer type sensor, the external field fluctuation is sensed and after being adjusted for the filtering effect of the magnet structure of the MRI device itself, the master oscillator of the MRI device is adjusted to compensate for the external field fluctuation. Alternatively the current of the magnet coil is adjusted.
    Type: Grant
    Filed: October 16, 1991
    Date of Patent: May 25, 1993
    Assignee: Resonex, Inc.
    Inventors: Robert J. Perlmutter, Brian P. Wilfley, Rick Motamedi, John Moberly
  • Image restoration process for magnetic resonance imaging resonance imaging
    Patent number: 4876509
    Abstract: An improved image restoration technique for an MRI method is provided where after the corrected location of image points is determined, an improved interpolation technique is used in determining the intensity value of that image point utilizing the surrounding pixels, e.g., 4 or 16. The interpolation technique provides for a uniform noise variance by using a weighted average interpolation technique with the added constraint that the sum of the squares of the interpolation weighting functions is substantially equal to a constant. The resulting image may be sharpened by a hybrid convolution technique which separately processes border regions.
    Type: Grant
    Filed: November 3, 1987
    Date of Patent: October 24, 1989
    Assignee: Resonex, Inc.
    Inventor: Robert J. Perlmutter
  • Optical-digital hologram recording
    Patent number: 4701006
    Abstract: A hologram is formed of an object by calculating a two dimensional complex field distribution for a diffraction pattern of the object, and then modulating a first coherent light beam with amplitude and phase values of the two-dimensional complex field distribution as the first coherent light beam is scanned across a recording medium. A second reference coherent light beam is scanned across the recording medium and intersects the first modulated coherent light beam in the recording medium as the two beams are scanned. A reflection hologram is synthesized in the recording medium by directing the two beams from opposite sides of the film recording medium.
    Type: Grant
    Filed: February 20, 1985
    Date of Patent: October 20, 1987
    Assignee: Stanford University
    Inventor: Robert J. Perlmutter