Patents by Inventor Edward L. Steiger

Edward L. Steiger 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).

  • Patent number: 4005064
    Abstract: There is disclosed the preparation of novel liquid-crystal compounds of the structure: ##STR1## WHERE X AND Y ARE THE SAME OR DIFFERENT INTEGERS OF 1 TO 10, TYPICALLY 1 TO 5, AND WHERE AB is selected from ##STR2##
    Type: Grant
    Filed: May 18, 1971
    Date of Patent: January 25, 1977
    Assignee: Owens-Illinois, Inc.
    Inventors: Heinz J. Dietrich, Edward L. Steiger
  • Patent number: 4000124
    Abstract: There is disclosed the preparation of novel liquid-crystal compounds of the structure: ##STR1## WHERE X AND Y ARE THE SAME OR DIFFERENT INTEGERS OF 1 TO 10, TYPICALLY 1 TO 5.
    Type: Grant
    Filed: May 18, 1971
    Date of Patent: December 28, 1976
    Assignee: Owens-Illinois, Inc.
    Inventors: Edward L. Steiger, Heinz J. Dietrich
  • Patent number: 3996190
    Abstract: In the production of urea/formaldehyde molding resins, wherein urea and formaldehyde are reacted under alkaline conditions to form a liquid resinous composition, the composition is blended with a filler and the filled composition is dried, there is provided an improvement comprising reducing the level of formaldehyde fumes discharged to the atmosphere during drying by a process which comprises the steps of:A. charging urea and formaldehyde to a reaction vessel in amounts to provide an initial mol ratio of formaldehyde to urea of about 1.0 to about 2.0 mols formaldehyde per mol of urea;B. reacting the urea and formaldehyde in water at a temperature in the range of about 50.degree. to 65.degree. C. and at a pH of about 7.0 to about 9.0;C. continuing the reaction until the mol ratio of formaldehyde to urea in the resin is at least about 75 percent of the initial mol ratio; andD. adding additional urea in an amount of about 0.
    Type: Grant
    Filed: September 15, 1975
    Date of Patent: December 7, 1976
    Assignee: Allied Chemical Corporation
    Inventors: Charles T. O'Neill, Edward L. Steiger