Patent US5500453 - (Oxo)sulfonium complex, polymerizable composition containing the complex ... - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More ??Sign inAdvanced Patent SearchPatentsA sulfonium complex or oxosulfonium complex of the formula (1), ##STR1## wherein R1 is a benzyl group, a substituted benzyl group, a phenacyl group, a substituted phenacyl group, an aryloxy group,