CRUCIBLE MATERIALS CORPORATION

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2006/0291,529 Cold wall induction nozzleAbandonedMay 16, 06Dec 28, 06[H05B]
6500583 Electrochemical hydrogen storage alloys for nickel metal hydride batteries, fuel cells and methods of manufacturing sameExpiredJul 17, 00Dec 31, 02[H01M]
5600554 Methods and apparatus for securing, integrating, and manipulating employee payroll and human resource informationExpiredSep 29, 94Feb 04, 97[G06F]
5482531 Titanium-free, nickel-containing maraging steel die block article and method of manufactureExpiredJun 05, 95Jan 09, 96[B22F]
5213610 Method for atomizing a titanium-based materialExpiredJan 06, 92May 25, 93[B22F]
5127970 Method for producing rare earth magnet particles of improved coercivityExpiredMay 21, 91Jul 07, 92[H01F]
5113591 Device for measuring out-of-roundnessExpiredMar 20, 91May 19, 92[G01B]
5055146 Permanent magnet alloyExpiredJun 09, 89Oct 08, 91[C22C]
5047205 Method and assembly for producing extruded permanent magnet articlesExpiredApr 14, 89Sep 10, 91[B22F]
4999051 System and method for atomizing a titanium-based materialExpiredSep 27, 89Mar 12, 91[B22D]
4994109 Method for producing permanent magnet alloy particles for use in producing bonded permanent magnetsExpiredMay 05, 89Feb 19, 91[H01F]
4990307 Method for producing particles for the production of permanent magnetsExpiredMar 22, 88Feb 05, 91[B22F]
4971756 Method for producing dies for use in compacting permanent magnet alloy powdersExpiredMay 12, 89Nov 20, 90[B22F]
4933142 Low carbon plus nitrogen free-machining austenitic stainless steels with improved machinability and corrosion resistanceExpiredFeb 03, 89Jun 12, 90[C22C]
4915891 Method for producing a noncircular permanent magnetExpiredNov 27, 87Apr 10, 90[B22F, H01F]
4902360 Permanent magnet alloy for elevated temperature applicationsExpiredOct 28, 88Feb 20, 90[H01F]
4881984 Consolidation of magnet alloy powders by extrusion and product therefromExpiredFeb 18, 88Nov 21, 89[H01F]
4880460 Powder metallurgy high speed tool steel article and method of manufactureExpiredMar 04, 88Nov 14, 89[C22C]
4839139 Powder metallurgy high speed tool steel article and method of manufactureExpiredFeb 25, 86Jun 13, 89[C22C]
4806155 Method for producing dysprosium-iron-boron alloy powderExpiredJul 15, 87Feb 21, 89[B22F]

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