Patents by Inventor William F. Nichols

William F. Nichols 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).

  • Process for photo-oxidative stability improvements
    Patent number: 7371906
    Abstract: A process for improving the stability to photo-oxidation of a polycyclic aromatic compound having at least two polymorphic forms comprises treating a first polymorph with one or more solvents to obtain the more stable second polymorph and then separating the second polymorph from the solvent.
    Type: Grant
    Filed: August 24, 2004
    Date of Patent: May 13, 2008
    Assignee: Eastman Kodak Company
    Inventors: William J. Begley, William F. Nichols, Manju Rajeswaran, Natasha Andrievsky, Michael R. Landry
  • Organic element for electroluminescent devices
    Patent number: 7147938
    Abstract: An electroluminescent device includes a light-emitting layer containing a host material and: (a) a compound of Formula (1): X1—Ar1—C(R1)?C(R2)—Ar2 ??(1) wherein: Ar1 represents a divalent aromatic group; Ar2 represents an aromatic group; X1 represents at least one electron-donating group; R1 and R2 independently represent hydrogen or a substituent; and (b) a light-emitting boron complex having an absorption spectrum that overlaps with the emission spectrum of compound (1). The device serves to improve luminance efficiency while maintaining good color purity.
    Type: Grant
    Filed: June 30, 2004
    Date of Patent: December 12, 2006
    Assignee: Eastman Kodak Company
    Inventors: Margaret J. Helber, Michele L. Ricks, William F. Nichols, Thomas L. Matochik, William B. Vreeland, Kevin M. Donovan
  • Superconducting shock absorber
    Patent number: 5283234
    Abstract: A contactless shock absorber assembly containing a chamber and a piston disposed therein is disclosed. The chamber is formed by alternating sections of superconductive material and electromagnetic coils; and the interior surfaces of the chamber define a symmetrical shape. The piston contains at least two magnetic sections and at least two nonmagnetic sections.
    Type: Grant
    Filed: May 28, 1991
    Date of Patent: February 1, 1994
    Assignee: Xingwu Wang
    Inventors: Xingwu Wang, William F. Nichols