A. Johnson Metals Corporation

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
RE32932 Cold hearth refiningExpiredJul 01, 88May 30, 89[B22D]
4763854 Container for continuous supply of wireExpiredFeb 23, 88Aug 16, 88[B65H]
4750542 Electron beam cold hearth refiningExpiredSep 28, 87Jun 14, 88[B22D]
4616363 Electron-beam furnace with magnetic stabilizationExpiredMay 22, 85Oct 07, 86[H01J]

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