Patents by Inventor Edward Koon Wah Wat

Edward Koon Wah Wat 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).

  • Phenylureidoimidazolidinediones as plant protectants
    Patent number: 4055412
    Abstract: Urea compounds of the formula: ##STR1## wherein X is hydrogen, fluorine, methoxy, meta-chlorine or meta-bromine, ARE USEFUL FOR PROTECTING PLANTS FROM ATMOSPHERIC OZONE DAMAGE.
    Type: Grant
    Filed: December 22, 1975
    Date of Patent: October 25, 1977
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Edward Koon Wah Wat
  • Heterocyclic ureas
    Patent number: 4032638
    Abstract: Ureas of the structure: ##STR1## WHEREIN X is F or Cl or OCH.sub.3 ;Y is O or NH;m is 0, 1 or 2 andN and n' each are 0 or 1 with the proviso that if n' is 1, X is not Cl and if Y is O, X is not Cl are useful in prevention of ozone damage to plants.
    Type: Grant
    Filed: April 3, 1975
    Date of Patent: June 28, 1977
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Edward Koon Wah Wat
  • Substituted-3-phenyl ureas
    Patent number: 3973946
    Abstract: Ureas of the structure ##EQU1## WHEREIN X is F or OCH.sub.3 ;Y is O or NH;m is 0, 1 or 2, andn and n' each are 0 or 1,Are useful in prevention of ozone damage to plants.
    Type: Grant
    Filed: November 20, 1974
    Date of Patent: August 10, 1976
    Assignee: E. I. DuPont de Nemours & Company
    Inventor: Edward Koon Wah Wat