Patents by Inventor Daniel P. Witt

Daniel P. Witt 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: 10188964
    Abstract: A method of making and loading a chromatography column includes selecting a column tube having an appropriate elasticity, and inner diameter and length, selecting appropriately sized flow distributors, a second flow distributor having a diameter that is larger than the inner diameter of the tube, permanently securing a first flow distributor to a first end of the tube, loading packing medium into the tube, inserting the second flow distributor into a second end of the tube to drive the second flow distributor into the tube to form a sealed chamber within the tube, adjusting the longitudinal position of the second flow distributor within the tube by applying a force to the second flow distributor until it reaches a desired location within the tube, and/or forcing liquid into the chamber to move the second flow distributor and permanently securing the properly positioned second flow distributor within the tube.
    Type: Grant
    Filed: January 30, 2013
    Date of Patent: January 29, 2019
    Assignee: REPLIGEN CORPORATION
    Inventors: Daniel P. Witt, William J. Wilde, Adrian Lowe, Michael Shamashkin, Peter Rezac, Alexander Slocum, Travis Ward
  • Patent number: 5795860
    Abstract: Disclosed are (1) methods for identifying natural and synthetic sequences having binding specificity for glycan-binding proteins, including proteins that act as effectors of biological activity, (2) compositions and methods of producing protein-specific glycosaminoglycan sequence and ligand antagonists capable of modulating the effector function of these ligands, and therapeutic compositions comprising these antagonists; and 3) compositions and methods for producing protein-specific glycosaminoglycan sequence analogs useful as agonists, and therapeutic compositions comprising these agonists.
    Type: Grant
    Filed: February 28, 1994
    Date of Patent: August 18, 1998
    Assignee: Repligen Corporation
    Inventors: Daniel P. Witt, Walter C. Herlihy, Jr.
  • Patent number: 5110905
    Abstract: The subject invention is directed to a novel Bacillus thuringiensis kurstaki .delta.-endotoxin prepared by use of a novel hybrid gene. This gene is cloned into a novel plasmid which is transformed into a prokaryotic host. The .delta.-endotoxin of the subject invention is active against Lepidoptera larvae.
    Type: Grant
    Filed: July 27, 1990
    Date of Patent: May 5, 1992
    Assignee: Repligen Corporation
    Inventors: Daniel P. Witt, Donald A. Colbert, Algis Anilionis