Patents by Inventor Leroy McKenzie

Leroy McKenzie 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).

  • Polarization dependent writing and erasing process for organic optical media
    Patent number: 5251197
    Abstract: A writing/erasing method for use in connection with homotropic organic optical media is disclosed and claimed. The method includes writing on a thin film with light of a first linear polarity to induce birefringence along the direction of an optical axis of the film's initial state followed by erasing the film with light of a second linear polarity. The first and second linear polarities are angularly offset with respect to one another, preferably by 90 degrees.
    Type: Grant
    Filed: February 13, 1992
    Date of Patent: October 5, 1993
    Assignee: Hoechst Celanses Corp.
    Inventors: Hartmann F. Leube, Leroy McKenzie
  • Self-assembled optical media
    Patent number: 5246747
    Abstract: Optical media formed from a water soluble polymer and liquid crystal forming amphiphile are disclosed and claimed. The polymer and amphiphile are cast into a film which exhibits an optical axis of symmetry perpendicular to the film surface.
    Type: Grant
    Filed: December 23, 1991
    Date of Patent: September 21, 1993
    Assignee: Hoechst Celanese Corp.
    Inventors: Gunilla E. Gillberg-LaForce, Hartmann Leube, Leroy McKenzie, Elizabeth A. Reeder, Josefina Pruksarnukul, Bettina E. Bonsall
  • Thin film optical medium of a multiple amphiphilic bilayer composite
    Patent number: 5246748
    Abstract: This invention provides novel self-assembled multilayer organic thin films including an azo-benzene chromophore which initially appear substantially amorphous when viewed perpendicular to the film surface, but are subsequently treated with a laser in selected areas so that such portions exhibit photo-induced birefringence.
    Type: Grant
    Filed: December 23, 1991
    Date of Patent: September 21, 1993
    Assignee: Hoechst Celanese Corp.
    Inventors: Gunilla E. Gillberg-Laforce, David E. Nikles, Leroy McKenzie, Bettina E. Bonsall
  • Low temperature, aqueous ammonia treatment for polycarbonate substrates and optical information media employing same
    Patent number: 5102739
    Abstract: Provided is a method for preparing an optical information medium which comprises a polycarbonate substrate. A polycarbonate substrate is subjected to an aqueous ammonia solution treatment at a temperature below ambient temperatures and for an extended period of time. This treatment occurs prior to assembly of the optical information medium. Use of the treated polycarbonate substrate in the optical information medium results in the medium exhibiting a high level of performance over an extended useful life.
    Type: Grant
    Filed: March 1, 1990
    Date of Patent: April 7, 1992
    Assignee: Hoechst Celanese Corp.
    Inventors: Frank J. Onorato, David E. Nikles, Leroy McKenzie, Jeffrey A. Schneider