Patents by Inventor Richard J. Daemer

Richard J. Daemer 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).

  • Vaccine against hepatitis A virus
    Patent number: 4894228
    Abstract: The present invention provides an attenuated hepatitis A virus useful as a vaccine.
    Type: Grant
    Filed: July 12, 1988
    Date of Patent: January 16, 1990
    Assignee: The United States of America as represented by the Department of Health and Human Services
    Inventors: Robert H. Purcell, John R. Ticehurst, Jeffrey I. Cohen, Suzanne U. Emerson, Stephan M. Feinstone, Richard J. Daemer, Ian D. Gust
  • Isolation of hepatitis A virus strain HM-175
    Patent number: 4636469
    Abstract: Human hepatitis A virus (HAV), taken directly from human clinical specimens, can be isolated and serially passaged in primary African green monkey kidney (AGMK) cell cultures. This strain induced antibody to HAV in inoculated chimpanzees and is useful for vaccine.
    Type: Grant
    Filed: December 26, 1984
    Date of Patent: January 13, 1987
    Assignee: The United States of America as represented by the Secretary of the Department of Health & Human Services
    Inventors: Richard J. Daemer, Stephen M. Feinstone, Ian D. Gust, Robert H. Purcell
  • Hepatitis A virus purified and triply cloned
    Patent number: 4620978
    Abstract: Human hepatitis A virus (HAV) can be purified by a process in which master seed lots of HM-175 strain of hepatitis A virus are prepared from triply cloned virus by terminal dilution at passage level about 20 or preferably at least 20-30. The clones tested induced minimal or no hepatitis although significant antibody response was provoked in inoculated primates. A method of preparing the triply cloned inoculum is also described.
    Type: Grant
    Filed: September 19, 1984
    Date of Patent: November 4, 1986
    Assignee: The United States of America as represented by the Department of Health and Human Services
    Inventors: Richard J. Daemer, Stephen M. Feinstone, Ian D. Gust, Robert H. Purcell
  • Isolation of hepatitis A virus strain HM-175
    Patent number: 4532215
    Abstract: Human hepatitis A virus (HAV), taken directly from human clinical specimens, can be isolated and serially passaged in primary African green monkey kidney (AGMK) cell cultures. This strain induced antibody to HAV in inoculated chimpanzees and is useful for vaccine.
    Type: Grant
    Filed: April 7, 1982
    Date of Patent: July 30, 1985
    Assignee: The United States of America as represented by the Department of Health and Human Services
    Inventors: Richard J. Daemer, Stephen M. Feinstone, Ian D. Gust, Robert H. Purcell
  • Vaccine against hepatitis A virus
    Patent number: RE37381
    Abstract: The present invention provides an attenuated hepatitis A virus useful as a vaccine.
    Type: Grant
    Filed: September 6, 1995
    Date of Patent: September 18, 2001
    Assignee: The United States of America as represented by the Department of Health and Human Services
    Inventors: Robert H. Purcell, John R. Ticehurst, Jeffrey I. Cohen, Suzanne U. Emerson, Stephen M. Feinstone, Richard J. Daemer, Ian D. Gust