Patents Examined by Arthur H. Roeckert
  • Sulfonium salts and use and preparation thereof
    Patent number: 5047568
    Abstract: Sulfonium salts of the formula: ##STR1## wherein Ar is a fused aromatic radical; R.sub.1 is a divalent organic bridge; each R.sub.2 and R.sub.3 individually is an alkyl, aryl, alkaryl, aralkyl or substituted aryl, provided thatn not more than one of R.sub.2 and R.sub.3 is alkyl; and A is a non-nucleophilic anion; use thereof and preparation thereof.
    Type: Grant
    Filed: November 18, 1988
    Date of Patent: September 10, 1991
    Assignee: International Business Machines Corporation
    Inventors: Raymond W. Angelo, Jeffrey D. Gelorme, Joseph P. Kuczynski, William H. Lawrence, Socrates P. Pappas, Logan L. Simpson