Patents by Inventor Joel R. Crabbe

Joel R. Crabbe 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).

  • Pseudomonas chlororaphis microorganism, polyurethane degrading enzyme obtained therefrom, and method of use
    Patent number: 6180381
    Abstract: Wild-type bacteria with polyurethanase activity, and the ability to excrete polyurethanase into a culture medium have been genetically altered to significantly increase their polyurethanase activity. Biologically pure cultures of these genetically altered are cultured in a medium containing an inducer for the production of polyurethanase. The bacteria are then removed from the culture medium to provide a preparation with a high polyurethanase activity. One useful genetically altered bacteria is a strain of Pseudomonas chlororaphis designated ATTC No. 55729. The polyurethanase-containing preparation may then be used directly to degrade polyurethane, particularly polyurethane and polyurethane-based coatings.
    Type: Grant
    Filed: January 30, 1998
    Date of Patent: January 30, 2001
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Michael T. Montgomery, James R. Campbell, Joel R. Crabbe, Steven E. Walz, Laura Thompson
  • Pseudomonas chlororaphis microorganism polyurethane degrading enzyme obtained therefrom and method of using enzyme
    Patent number: 5714378
    Abstract: Wild-type bacteria with polyurethanase activity, and the ability to excrete polyurethanase into a culture medium have been genetically altered to significantly increase their polyurethanase activity. Biologically pure cultures of these genetically altered are cultured in a medium containing an inducer for the production of polyurethanase. The bacteria are then removed from the culture medium to provide a preparation with a high polyurethanase activity. One useful genetically altered bacteria is a strain of Pseudomonas chlororaphis designated ATTC No. 55729. The polyurethanase-containing preparation may then be used directly to degrade polyurethane, particularly polyurethane and polyurethane-based coatings.
    Type: Grant
    Filed: March 31, 1995
    Date of Patent: February 3, 1998
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Michael T. Montgomery, James R. Campbell, Joel R. Crabbe, Steven E. Walz, Laura Thompson