Research Frontiers (REFR) Message Board

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Technology Stocks : Research Frontiers (REFR)

REFR 1.730

+10.2%

Nov 11 3:57 PM EST

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To: N. Dixon who wrote (1032)	10/12/1998 1:21:00 PM
From: Zeev Hed	Read Replies (1) of 50119

N. Dixon, I just spent the last hour on the IBM patent site. I found 18 patents (still effective, namely applied after October 1978) assigned to REFR. I perused through few of them, and it becomes clear to me why it has taken so long to even breach commerciality. It seems that they have concentrated on the technology of particles suspended within a liquid (the Original Land approach), while they should have concentrated on droplets of electrically active material within a solid film. One of the patents even goes through the trouble of providing a very high frequency additional field (400 khz) just to maintain the particles in suspension. I truly believe that the approach that Doanes, and Raychem are taking (Polymer dispersed liquid crystals or PDLC) has much greater long term stability. Just one persons opinion, and I have been involved with both the electrochromic as well as the PDLC fields. Zeev

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