Patents by Inventor Robert L. Charles

Robert L. Charles 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).

  • Compositions for the prevention and treatment of viral-induced tumors
    Patent number: 5662902
    Abstract: Prophylactic and therapeutic agents for the prevention and treatment of viral-induced tumors and, in particular, compositions derived from an Aspergillus fermentation extract, and the use thereof, either directly or to prepare a medicament, for the prevention and treatment of viral-induced tumors in mammals. Such tumors include papilloma-induced tumors. The composition is topically administered.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: September 2, 1997
    Assignee: Genencor International, Inc.
    Inventors: Ernest W. Boyer, Robert L. Charles
  • Compositions for the prevention and treatment of viral-induced tumors
    Patent number: 5662903
    Abstract: Prophylactic and therapeutic agents for the prevention and treatment of viral-induced tumors and, in particular, compositions derived from an Aspergillus fermentation extract, and the use thereof, either directly or to prepare a medicament, for the prevention and treatment of viral-induced tumors in mammals. Such tumors include papilloma-induced tumors. The composition is topically administered.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: September 2, 1997
    Assignee: Genencor International, Inc.
    Inventors: Ernest W. Boyer, Robert L. Charles
  • Compositions for the prevention and treatment of viral-induced tumors
    Patent number: 5562900
    Abstract: Prophylactic and therapeutic agents for the prevention and treatment of viral-induced tumors and, in particular, compositions derived from an Aspergillus fermentation extract, and the use thereof, either directly or to prepare a medicament, for the prevention and treatment of viral-induced tumors in mammals. Such tumors include papilloma-induced tumors. The composition is topically administered.
    Type: Grant
    Filed: September 27, 1994
    Date of Patent: October 8, 1996
    Assignee: Solvay Enzymes, Inc.
    Inventors: Ernest W. Boyer, Robert L. Charles
  • Method for producing a therapeautic composition for papillomavirus-induced tumors with aspergillus niger
    Patent number: 5500359
    Abstract: Prophylactic and therapeutic agents for the prevention and treatment of viral-induced tumors and, in particular, compositions derived from an Aspergillus fermentation extract, and the use thereof, either directly or to prepare a medicament, for the prevention and treatment of viral-induced tumors in mammals. Such tumors include papilloma-induced tumors. The composition is topically administered.
    Type: Grant
    Filed: September 27, 1993
    Date of Patent: March 19, 1996
    Assignee: Solvay Enzymes, Inc.
    Inventors: Ernest W. Boyer, Robert L. Charles
  • Bacillus licheniformis NRRL B-18962 capable of producing levan sucrase in the absence of sucrose
    Patent number: 5380661
    Abstract: The invention relates to an acid stable levan sucrase derived from Bacillus licheniformis NRRL B-19862. The levan sucrase is produced by culturing Bacillus licheniformis NRRL B-19862 in a suitable nutrient medium but in the absence of sucrose. The invention also discloses compositions containing the levan sucrase.
    Type: Grant
    Filed: October 19, 1993
    Date of Patent: January 10, 1995
    Assignee: Solvay Enzymes, Inc.
    Inventors: Robert L. Charles, Jayarama K. Shetty
  • Process for producing levan sucrase using Bacillus licheniformis
    Patent number: 5334524
    Abstract: The present invention relates to an acid stable levan sucrase enzyme which is not induced by sucrose.The present invention relates to a process for the preparation of this enzyme and microorganisms producing the levan sucrase enzyme. The invention also provides compositions containing this enzyme.
    Type: Grant
    Filed: May 18, 1992
    Date of Patent: August 2, 1994
    Assignee: Solvay Enzymes, Inc.
    Inventors: Robert L. Charles, Jayarama K. Shetty
  • Recovery of microbial lipase
    Patent number: 4717665
    Abstract: Disclosed is a method for causing the dissociation of microbial mycelium and extracellular lipase bound thereto and increasing the measurable activity of the lipase. The method involves treating an aqueous suspension of the mycelium with the anhydride of a dicarboxylic acid which results in dissociation of the mycelium and lipase thereby facilitating recovery of the lipase.
    Type: Grant
    Filed: May 16, 1986
    Date of Patent: January 5, 1988
    Assignee: Miles Laboratories, Inc.
    Inventors: Robert L. Charles, Steven C. Dolby, Chimanbhai P. Patel, Jayarama K. Shetty