Patents by Inventor Donald G. Walker

Donald G. Walker 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: 20090156828
    Abstract: The present invention is broadly directed to novel compounds useful for the synthesis of biologically active compounds. More particularly, the present embodiments disclosed herein relate to novel side chains, that when coupled to a taxane, are useful for the synthesis of pharmaceutically useful taxanes. Methods of forming the novel side chains and coupling them to hindered alcohols, namely taxanes resulting in useful esters are also disclosed. Various taxanes compounds are known to exhibit anti-tumor activity.
    Type: Application
    Filed: December 21, 2005
    Publication date: June 18, 2009
    Inventors: John T. Henri, James D. McChesney, Sylesh Venkataraman, Christian Sumner, George Petros Yiannikouros, Aaron Michael Stemphoski, Donald G. Walker
  • Patent number: 7132544
    Abstract: The present invention relates to a process for preparing tetrasubstituted imidazole derivatives of the general formula (I) wherein R1, R2, R3 and R4 are as defined in the specification below. The present invention further relates to a process for preparing the compound of formula (II) and novel crystalline structures of the compound of formula (II).
    Type: Grant
    Filed: October 4, 2005
    Date of Patent: November 7, 2006
    Assignee: Ortho-McNeil Pharmaceutical, Inc.
    Inventors: Hua Zhong, Silke Dubberke, Stefan Müller, Armin Rossler, Thomas W. Schultz, Daniel J. Korey, Thomas Otten, Donald G. Walker, Ahmed Abdel-Magid
  • Patent number: 7067671
    Abstract: The present invention relates to a process for preparing tetrasubstituted imidazole derivatives of the general formula (I) wherein R1, R2, R3 and R4 are as defined in the specification below. The present invention further relates to a process for preparing the compound of formula (II) and novel crystalline structures of the compound of formula (II).
    Type: Grant
    Filed: February 22, 2002
    Date of Patent: June 27, 2006
    Assignee: Ortho-McNeil Pharmaceutical, Inc.
    Inventors: Hua Zhong, Silke Dubberke, Stefan Müller, Armin Rossler, Thomas W. Schultz, Daniel J. Korey, Thomas Otten, Donald G. Walker, Ahmed Abdel-Magid
  • Publication number: 20040063960
    Abstract: The present invention is directed to a process for preparing 3S-3-amino-3-aryl propionic acid and derivatives thereof.
    Type: Application
    Filed: September 25, 2003
    Publication date: April 1, 2004
    Inventors: Lorraine Scott, Frank John Villani, Donald G. Walker
  • Publication number: 20040054607
    Abstract: A distribution system for transferring a plurality of items from a distribution center to a customer comprises a delivery device and a retail device. The delivery device identifies the items and maintains a delivery record of a transfer of the items from the distribution center to the customer. The retail device identifies the items and maintains a receipt record of the transfer of the items. Upon identifying the item, the delivery device displays a description of the item on a display screen, such as the display on a portable computer. The delivery device identifies the items with a barcode scanner. The delivery device also includes a data entry apparatus to enter transfer information, such as an electronically captured signature, into the delivery record.
    Type: Application
    Filed: September 12, 2002
    Publication date: March 18, 2004
    Inventors: Steffanie G. Waddington, Dan White, Thomas M. Magill, Donald G. Walker, Erwin Milton Jesse Bork, Warren T. George
  • Patent number: 6673926
    Abstract: The present invention is directed to a process for preparing 3S-3-amino-3-aryl propionic acid and derivatives thereof.
    Type: Grant
    Filed: October 29, 2001
    Date of Patent: January 6, 2004
    Assignee: Ortho-McNeil Pharmaceutical, Inc.
    Inventors: Lorraine Scott, Frank John Villani, Jr., Donald G. Walker
  • Patent number: 6666375
    Abstract: A unitary, rotary encoder disk provides low cost, ease of manufacture, and resolution capability exceeding through hole encoders and, in one embodiment, equivalent to that achieve in thin film technologies. The unitary construct is molded as a transparent polymer disk, with integrated mounting features. Either molded disk surface features or laser burning is used to facilitate the position graduation mark forming process.
    Type: Grant
    Filed: April 5, 2000
    Date of Patent: December 23, 2003
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Douglas L. Harriman, David F. D. Buck, Donald G. Walker
  • Publication number: 20030176471
    Abstract: The present invention is directed to a process for preparing 3S-3-amino-3-aryl propionic acid and derivatives thereof.
    Type: Application
    Filed: March 27, 2003
    Publication date: September 18, 2003
    Inventors: Lorraine Scott, Donald G. Walker, Frank John Villani,
  • Publication number: 20030045723
    Abstract: The present invention relates to a process for preparing tetrasubstituted imidazole derivatives of the general formula (I) 1
    Type: Application
    Filed: February 22, 2002
    Publication date: March 6, 2003
    Inventors: Hua Zhong, Silke Dubberke, Stefan Muller, Armin Rossler, Thomas W. Schultz, Daniel J. Korey, Thomas Otten, Donald G. Walker, Ahmed Abdel-Magid
  • Publication number: 20020068829
    Abstract: The present invention is directed to a process for preparing 3S-3-amino-3-aryl propionic acid and derivatives thereof.
    Type: Application
    Filed: October 29, 2001
    Publication date: June 6, 2002
    Inventors: Lorraine Scott, Frank John Villani, Donald G. Walker
  • Publication number: 20020010661
    Abstract: A distribution system for transferring a plurality of items from a distribution center to a customer comprises a delivery device and a retail device. The delivery device identifies the items and maintains a delivery record of a transfer of the items from the distribution center to the customer. The retail device identifies the items and maintains a receipt record of the transfer of the items. Upon identifying the item, the delivery device displays a description of the item on a display screen, such as the display on a portable computer. The delivery device identifies the items with a barcode scanner. The delivery device also includes a data entry apparatus to enter transfer information, such as an electronically captured signature, into the delivery record.
    Type: Application
    Filed: May 30, 2001
    Publication date: January 24, 2002
    Inventors: Steffanie G. Waddington, Dan A. White, Thomas M. Magill, Donald G. Walker, Erwin Milton Jesse Bork,, Warren T. George
  • Patent number: 6213264
    Abstract: An improved camshaft sealing arrangement includes seals at each end of the camshaft housing. In addition, seals and washers are positioned between the camshaft and the slack adjuster connection. The combined seals provide a camshaft that is less likely to require maintenance than prior art camshafts. The seal adjacent the cam contacts an outer periphery of the camshaft housing. This seal also provides a thrust bearing washer surface against the camshaft. The seals between the camshaft and the slack adjuster include washers to properly secure and position the seals, the camshaft and the slack adjuster.
    Type: Grant
    Filed: October 15, 1996
    Date of Patent: April 10, 2001
    Assignee: Meritor Heavy Vehicle Systems, L.L.C.
    Inventors: Donald G. Walker, David J. Dettloff, David J. Edwards
  • Patent number: 5893434
    Abstract: A brake lining wear indicator is attached to a drum brake shoe backing plate adjacent the brake lining. The indicator provides a visual gage dimension that assists in the determination of when the brake linings should be replaced. This determination can be made in a very short period of time without requiring a physical measurement of the thickness of the brake lining on each brake shoe.
    Type: Grant
    Filed: April 17, 1997
    Date of Patent: April 13, 1999
    Assignee: Meritor Heavy Vehicle Systems, LLC
    Inventors: Donald G. Walker, David J. Dettloff, David J. Edwards, Roger Gooch
  • Patent number: 5649612
    Abstract: An improved bracket member for a vehicle brake system is disclosed. The bracket member has a wing bracket at one end for mounting of a brake actuating mechanism and a mounting plate at the opposite end for connection to the spider of the brake assembly. A hollow tubular member is positioned between the wing bracket and mounting plate and securely affixed to each of them, such as by welding. The tubular member can be of any length depending on the vehicle and applicable clearance space. The mounting plate is secured such as by fasteners to the brake assembly. Also, the tubular member protrudes through the mounting plate and is adapted to be separately securely connected to the brake assembly. The end of the tubular member can be securely attached to an opening in the brake assembly in a number of ways, such as by an interference fit, press fit, wedge fit, compression fit in combination with a spanner nut, pinch joint or the like. The end of the tubular member can also be knurled or splined.
    Type: Grant
    Filed: April 3, 1996
    Date of Patent: July 22, 1997
    Assignee: Rockwell International Corporation
    Inventors: Donald G. Walker, David J. Dettloff, David J. Edwards
  • Patent number: 5325945
    Abstract: A brake support assembly for a vehicle including a stamped metal spider having a planar mounting portion and a pair of diametrically opposed support portions. A first support portion includes a first pair of ribs extending along opposite edges thereof as involuted ribs. A second support portion includes a second pair of ribs extending along opposite edges thereof to form flanges. A bracket extends across and connects the first pair of ribs. The bracket and the first support portion of the spider include laterally spaced apertures which receive press fit sleeve-type bushings. Anchor pins disposed in said sleeve-type bushings carry one end of a pair of brake shoes each comprised of a pair of spaced generally parallel webs secured to a table. The opposite end of the brake shoes is supported by cam follower rollers. Springs bias the brake shoes into contact with a cam actuator which may be rotated to displace the brake shoes.
    Type: Grant
    Filed: September 23, 1992
    Date of Patent: July 5, 1994
    Assignee: Rockwell International Corporation
    Inventor: Donald G. Walker
  • Patent number: 4868294
    Abstract: Processes for the preparation of stable, crystalline cephalosporin intermediates of the formula ##STR1## wherein X is HI or HCl, and Nu and Nu.sup..sym. are certain N-containing heterocyclic rings attached via a sulfur atom or a ring nitrogen atom, respectively, which are substantially free of the .DELTA..sup.2 isomer; processes for intermediates in the preparation of the above compounds; and processes for the preparation of broad-spectrum cephalosporin antibiotics.
    Type: Grant
    Filed: March 23, 1987
    Date of Patent: September 19, 1989
    Assignee: Bristol-Myers Company
    Inventors: Steven P. Brundidge, Paul R. Brodfuehrer, Chet Sapino, Jr., Kun M. Shih, Donald G. Walker
  • Patent number: 4714760
    Abstract: Stable, crystalline cephalosporin intermediates of the formula ##STR1## wherein X is HI or HCl and Nu and Nu.sup..sym. are certain N-containing heterocyclic rings attached via a sulfur atom or a ring nitrogen atom, respectively, which are substantially free of the .DELTA..sup.2 isomer; processes for, and intermediates in, the preparation of the above compounds; and processes for the preparation of broad-spectrum cephalosporin antibiotics.
    Type: Grant
    Filed: July 11, 1986
    Date of Patent: December 22, 1987
    Assignee: Bristol-Myers Company
    Inventors: Steven P. Brundidge, Paul R. Brodfuehrer, Chet Sapino, Jr., Kun M. Shih, Donald G. Walker
  • Patent number: 4659812
    Abstract: Temperature stable crystalline mono-hydrochloric and sulfuric acid addition salts of 7-amino-3-(1-methylpyrrolidinio)methyl-3-cephem-4-carboxylate substantially free of .DELTA..sup.2 isomer are intermediates for the preparation of broad spectrum 7-[.alpha.-(2-aminothiazol-4-yl)-.alpha.-(Z)-methoxyiminoacetamido]-3-[(1- methyl-1-pyrrolidinio)methyl]-3-cephem-4-carboxylates.
    Type: Grant
    Filed: August 20, 1985
    Date of Patent: April 21, 1987
    Assignee: Bristol-Myers Company
    Inventors: Shimpei Aburaki, Yukio Narita, Jun Okumura, Takayuki Naito, Donald G. Walker
  • Patent number: 4266795
    Abstract: The rear portion of a load hauling flatbed truck and the front portion of a conventional forklift vehicle are provided with structures facilitating towing of the forklift vehicle by the truck to a remote site so that the forklift vehicle is available for loading and/or unloading materials onto or from the flatbed truck. Basically, left and right rocking levers intermediately pivoted adjacent to left and right front corner portions of the forklift vehicle are hydraulically rocked so that the extending front portions of the rocking members engage about engagement structures secured adjacent to the left and right rear corners of the truck and thereby effect a lifting of the entire front portion of the forklift vehicle when the rocking members are rocked downwardly. Appropriate locking pins are inserted to secure the rocking members to the rear corner portions of the towing truck.
    Type: Grant
    Filed: October 22, 1979
    Date of Patent: May 12, 1981
    Inventor: Donald G. Walker