Nihon Kogyo Kabushiki Kaisha

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4770948 High-purity metal and metal silicide target for LSI electrodesExpiredJun 23, 86Sep 13, 88[H01L]
4619695 Process for producing high-purity metal targets for LSI electrodesExpiredJul 26, 84Oct 28, 86[C22B]
4615964 Vapor-deposited film of selenium as photoreceptor for electrophotography and process for producing the sameExpiredJan 06, 84Oct 07, 86[G03G]
4614568 High-speed silver plating and baths thereforExpiredJun 04, 84Sep 30, 86[C25D]
4585621 Vapor-deposited film of selenium or selenium alloy for electrophotographyExpiredJun 29, 84Apr 29, 86[G03G]
4452757 Copper alloy for radiatorsExpiredNov 09, 82Jun 05, 84[C22C]
4309457 Process of producing multilayer-coated composite powderExpiredOct 11, 79Jan 05, 82[B05D]
4309458 Process of producing composite powder coated with noble metalExpiredOct 11, 79Jan 05, 82[B05D]
4257778 Process for producing synthetic coking coal of high volatile matter contentExpiredAug 28, 79Mar 24, 81[C10M, C10G]
4243728 Double-metal-coated metal sulfide powder and process of producing the sameExpiredNov 28, 78Jan 06, 81[B22F]
4242376 Method for metal plating of powder by substitutionExpiredOct 16, 79Dec 30, 80[B44D]
4233254 Process for granulating metal sulfide powdersExpiredDec 22, 78Nov 11, 80[B01J]
4221828 Process of producing metal sulfide powder coated with copperExpiredNov 08, 78Sep 09, 80[B05D]

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