Patents by Inventor Robert A. Clement

Robert A. Clement 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).

  • Nonlinear optical devices for derivatives of stilbene and diphenylacetylene
    Patent number: 5015417
    Abstract: Certain derivatives of stilbene and diphenylacetylene are capable of second harmonic generation when illuminated by coherent optical radiation.
    Type: Grant
    Filed: February 11, 1988
    Date of Patent: May 14, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Robert A. Clement, Ying Wang
  • Nonlinear optical devices from derivatives of stilbene and diphenylacetylene
    Patent number: 4966730
    Abstract: Certain derivatives of stilbene and diphenylacetylene are capable of second harmonic generation when illuminated by coherent optical radiation.
    Type: Grant
    Filed: December 20, 1989
    Date of Patent: October 30, 1990
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Robert A. Clement, Wilson Tam, Ying Wang
  • Nonlinear optical devices from derivatives of stilbene
    Patent number: 4961631
    Abstract: Certain derivatives of stilbene are capable of second harmonic generation when illuminated by coherent optical radiation.
    Type: Grant
    Filed: November 16, 1989
    Date of Patent: October 9, 1990
    Assignee: E. I Du Pont de Nemours and Company
    Inventors: Robert A. Clement, Wilson Tam, Ying Wang
  • Nonlinear optical devices from derivatives of stilbene and diphenylacetylene
    Patent number: 4909964
    Abstract: Certain derivatives of stilbene and diphenylacetylene capable of second harmonic generation when illuminated by coherent optical radiation are presented.
    Type: Grant
    Filed: February 11, 1988
    Date of Patent: March 20, 1990
    Assignee: E. I. DuPont de Nemours and Company
    Inventors: Robert A. Clement, Wilson Tam, Ying Wang
  • Methyl- and chloro- substituted aromatic diketodiols
    Patent number: 4276226
    Abstract: Aromatic diketones and diesters are provided of the formula ##STR1## wherein R is independently methyl or chloro; R' is independently hydrogen or R; R.sup.2 is 1,4-phenylene, 1,3-phenylene, 2,6-naphthylene, 4,4'-biphenylene, or 4,4'-biphenylene ether; and R.sup.3 is hydrogen or ##STR2## where R.sup.4 is a hydrocarbon group of 1-10 carbon atoms.
    Type: Grant
    Filed: July 23, 1979
    Date of Patent: June 30, 1981
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Robert A. Clement, Burton C. Anderson