Patents by Inventor Howard Paul Hershey

Howard Paul Hershey 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).

  • Methods for identifying herbicidal agents that inhibit D1 protease
    Patent number: 6444457
    Abstract: D1 protease has been isolated from the alga (Scenedesmjus obliquus), wheat, and Synechocystis PCC 6803 and the genes encoding these enzymes have been cloned and sequenced. Native or recombinantly produced enzyme has been used to develop assays to detect herbicidal compositions capable of inhibiting the D1 protease enzyme.
    Type: Grant
    Filed: October 15, 1998
    Date of Patent: September 3, 2002
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Dexter Allan Chisholm, Bruce Aaron Diner, Gail K Donaldson, Howard Paul Hershey, Douglas Brian Jordan, Xiao Song Tang, Shaojie Wang
  • Accumulation of fructans in plants by targeted expression of bacterial levansucrase
    Patent number: 5908975
    Abstract: This invention concerns methods for synthesis and accumulation of fructose polymers in seed, tubers or leaves of transgenic plants by selective expression of a bacterial fructosyltransferase gene. Selective expression includes coordination of timing, tissue specific expression and especially subcellular location. Successful transformants utilize sucrose to synthesize and accumulate fructan in the vacuole of the cell, in established crops, without loss of co-products or concern for yield loss due to degradation during maturation, harvest or storage of the plant. Enhanced fructan production will benefit the fructose sweetener industry and add value to grain used for feed.
    Type: Grant
    Filed: May 6, 1996
    Date of Patent: June 1, 1999
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Perry Gerard Caimi, Howard Paul Hershey, Phillip S. Kerr
  • Methods for identifying herbicidal agents that inhibit D1 protease
    Patent number: 5876945
    Abstract: D1 protease has been isolated from the alga (Scenedesmjus obliquus), wheat, and Synechocystis PCC 6803 and the genes encoding these enzymes have been cloned and sequenced. Native or recombinantly produced enzyme has been used to develop assays to detect herbicidal compositions capable of inhibiting the D1 protease enzyme.
    Type: Grant
    Filed: December 5, 1996
    Date of Patent: March 2, 1999
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Dexter Allan Chisholm, Bruce Aaron Diner, Gail K. Donaldson, Howard Paul Hershey, Douglas Brian Jordan, Xiao Song Tang, Shaojie Wang, Jeffrey T. Trost, Patrick V. Warren