Patents by Inventor Daniel R. Twardzik

Daniel R. Twardzik 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).

  • Platelet related growth regulator
    Patent number: 4645828
    Abstract: Novel polypeptide compositions are provided which inhibit human tumor cell growth, which may or may not stimulate autophosphorylation of pp60 src and induce the release of a 52 kDal polypeptide from neoplastic cells. Individual polypeptides may be isolated from mammalian blood platelets by selected extraction and purification procedures, may be synthesized or produced by hybrid DNA technology.
    Type: Grant
    Filed: March 15, 1985
    Date of Patent: February 24, 1987
    Assignee: ONCOGEN
    Inventors: Daniel R. Twardzik, George J. Todaro
  • Platelet related growth regulator
    Patent number: 4590003
    Abstract: Polypeptide compositions are provided which inhibit human tumor cell growth. The compositions may be obtained from mammalian blood platelets by selective extraction and purification procedures and are shown to inhibit tumor growth in vitro.
    Type: Grant
    Filed: March 23, 1984
    Date of Patent: May 20, 1986
    Assignee: Oncogen
    Inventors: Daniel R. Twardzik, George J. Todaro