Patents by Inventor Patrick A. Alexander

Patrick A. Alexander 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).

  • Calcium free subtilisin mutants
    Patent number: 5707848
    Abstract: Novel calcium free subtilisin mutants are taught, in particular a subtilisin which has been mutated to eliminate amino acids 75-83.
    Type: Grant
    Filed: November 27, 1995
    Date of Patent: January 13, 1998
    Assignee: University of Maryland
    Inventors: Philip N. Bryan, Patrick A. Alexander, Susan L. Strausberg
  • Subtilisin mutants lacking a primary calcium binding site
    Patent number: 5567601
    Abstract: Novel calcium free subtilisin mutants are taught, in particular subtilisins which have been mutated to eliminate amino acids 75-83 and which retain enzymatic activity and stability. Recombinant methods for producing same and recombinant DNA encoding for such subtilisin mutants are also provided.
    Type: Grant
    Filed: September 20, 1994
    Date of Patent: October 22, 1996
    Assignee: University of Maryland
    Inventors: Philip N. Bryan, Patrick A. Alexander, Susan L. Strausberg
  • Calcium free subtilisin mutants
    Patent number: 5470733
    Abstract: Novel calcium free subtilisin mutants are taught, in particular a subtilisin which has been mutated to eliminate amino acids 75-83.
    Type: Grant
    Filed: June 1, 1993
    Date of Patent: November 28, 1995
    Assignee: University of Maryland
    Inventors: Philip N. Bryan, Patrick A. Alexander, Susan L. Strausberg