Patents Represented by Attorney S. J. Hultquist

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  • Process for the prepartion of vinylpolystyrylpyridine compounds
    Patent number: 4471107
    Abstract: An improved method to prepare vinylpolystyrylpyridines comprises reacting a polymethylpyridine and an aromatic dialdehyde to form a 1:1 adduct and thereafter adding a methylvinylpyridine to terminate the adduct. Vinylpolystyrylpyridines are useful as cross-linking agents in bis-imide resin matrix compositions comprising reinforcing fillers.
    Type: Grant
    Filed: January 30, 1984
    Date of Patent: September 11, 1984
    Assignee: American Cyanamid Company
    Inventor: Steven L. Peake
  • Gas-liquid contacting tray with improved inlet bubbling means
    Patent number: 4275021
    Abstract: A gas-liquid contacting tray of the crossflow type with improved means for initiating bubbling activity at the tray inlet region comprising spaced-apart imperforate wall members extending substantially vertically upwardly and transverse to the liquid flow path, contiguously associated and coextensive at their upper edges with an intermediate perforated wall member horizontally extending therebetween.
    Type: Grant
    Filed: March 17, 1977
    Date of Patent: June 23, 1981
    Assignee: Union Carbide Corporation
    Inventors: Robert D. Kirkpatrick, David W. Weiler