<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31299299</termId><termName>Plexiglas (TM)</termName><termType>PT</termType><termNote><![CDATA[ Proprietary name for polymerized methyl methacrylate, used as a substitute for glass in products such as windows, skylights, illuminated signs, and aircraft. Plexiglas was trademarked by Rohm and Haas AG in Germany ca. 1930s. ]]></termNote><termCreatedDate>2026-03-30 20:20:18</termCreatedDate><relation><relationType>UF</relationType><termId>31299300</termId><termName>Plexiglass</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31299301</termId><termName>plexiglas</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31297611</termId><termName>brand name materials</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>31373493</termId><termName>polymethyl methacrylate</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>31409816</termId><termName>acrylic sheet</termName><termType>PT</termType></relation></term>  </Zthes>