Pyrex Insulator

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Object Name: 
Pyrex Insulator
Accession Number: 
H: 10 cm; Diam: 6.8 cm
Not on Display
about 1928
Credit Line: 
Gift of Corning Inc., Dept. of Archives and Record Management
Primary Description: 
Colorless non-lead glass, borosilicate; pressed; rough cylindrical shape; domed crown; side wire groove; skirt tapered in near top, rest of skirt tapered out to base, "PYREX®/T.M. REG.U.S. PAT. OFF" molded into front of skirt, "MADE IN U.S.A./PAT. APPD. FOR," "!P," molded into rear; smooth base/rim, "1667.85" and "85-20" painted in black ink onto base; threads inside skirt; threaded pinhole.
Corning Inc., Dept. of Archives and Record Management, Former Collection