Patents by Inventor Robert G. Hall

Robert G. Hall 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).

  • Paper input guide for a transfer zone in a xerographic printing apparatus
    Patent number: 6687479
    Abstract: A printing apparatus includes a guide member for directing sheets toward a transfer zone. The guide member defines a set of ribs which hold the sheets above the main surface of the guide member. Thus, any stray marking material which lands on the guide member is relatively unlikely to contact a sheet moving over the guide member.
    Type: Grant
    Filed: May 31, 2002
    Date of Patent: February 3, 2004
    Assignee: Xerox Corporation
    Inventors: Gerardo Leute, John W. D. Cooper, Ian Brailsford, Stan Alan Spencer, Roger D. Masham, Derek J. Milton, Robert G. Hall, Roderick A. Cooley, John M. Wysocky, Charles H. Tabb, Jorge A. Alvarez, Alexander C. Bisland, Peter A. Mayfield, Clifford W. Imes, IV, Peter J. M. Bloemen, Michael B. Thomson, Krzysztof J. Less, David G. Anderson
  • Paper input guide for a transfer zone in a xerographic printing apparatus
    Publication number: 20030223787
    Abstract: A printing apparatus includes a guide member for directing sheets toward a transfer zone. The guide member defines a set of ribs which hold the sheets above the main surface of the guide member. Thus, any stray marking material which lands on the guide member is relatively unlikely to contact a sheet moving over the guide member.
    Type: Application
    Filed: May 31, 2002
    Publication date: December 4, 2003
    Applicant: Xerox Corporation
    Inventors: Gerardo Leute, John W. D. Cooper, Ian Brailsford, Stan Alan Spencer, Roger D. Masham, Derek J. Milton, Robert G. Hall, Roderick A. Cooley, John M. Wysocky, Charles H. Tabb, Jorge A. Alvarez, Alexander C. Bisland, Peter A. Mayfield, Clifford W. Imes, Peter J. M. Bloemen, Michael B. Thomson, Krzysztof J. Less, David G. Anderson
  • Preparative two dimensional gel electrophoresis system
    Patent number: 5534121
    Abstract: A preparative two dimensional gel electrophoresis system which serves as a single procedure for separation and isolation of preparative amounts of proteins from complex biological preparations. The system includes sized-up isoelectric focusing tube gels and slab gel molds which allow for sample loads of between about 0.5 and 2 mg or greater. Increased protein loads, resolution and electrotransfer allow for subsequent sequencing of separated proteins by conventional methods.
    Type: Grant
    Filed: May 16, 1994
    Date of Patent: July 9, 1996
    Assignee: The United States of America as represented by the Department of Health and Human Services
    Inventors: B. Alex Merrick, Rachel M. Patterson, Robert G. Hall, Chaoying He, James K. Selkirk