BNF METALS TECHNOLOGY CENTRE

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4968392 Treatment of condenser tubesExpiredOct 14, 88Nov 06, 90[C23C, C25D]
4912410 Apparatus for measuring the thickness of an electrically non-conductive material on a metallic baseExpiredSep 29, 88Mar 27, 90[G01B, G01R]
4907894 Surface-temperature sensing method and apparatusExpiredDec 20, 88Mar 13, 90[G01K]
4731129 Superplastic zinc/aluminum alloyExpiredAug 22, 86Mar 15, 88[C22F, C22C]
4496394 Continuous method of removing tin from leadExpiredJul 15, 83Jan 29, 85[C22B]

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