Marion Philip Guthrie, Director at RESEARCH FRONTIERS INC (REFR), bought 2,500 shares at $6.38 ($16K) on 2008-06-16, disclosed to the SEC on 2008-06-17.
Open-market purchase of $16k REFR by Director. Below the thresholds we flag for high-conviction alerts (no C-suite role, rare reversal, cluster, or A-grade history).
Nothing distinguishes this filing.