TAM CERAMICS, INC.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5858901 Temperature stable dielectricExpiredFeb 21, 96Jan 12, 99[C04B, H01G]
5461014 Lead perovskite based ceramic compositions without any free lead oxideExpiredJan 13, 94Oct 24, 95[C04B]
5362693 High temperature fired X7R dielectric ceramic composition submicron particle sized barium titanateExpiredNov 12, 93Nov 08, 94[C04B]
5279639 Compositions for synthesizing ladle slagsExpiredApr 06, 90Jan 18, 94[C21B]
5262368 Sintering aidExpiredNov 19, 91Nov 16, 93[C04B]
5147579 Moisture resistant sodium titanate and potassium titanateExpiredJul 17, 89Sep 15, 92[C09K]
5029042 Dielectric ceramic with high K, low DF and flat TCExpiredJul 20, 89Jul 02, 91[C09K, H01G]
5013913 Method of illuminating an object in a transmission electron microscopeExpiredJul 24, 89May 07, 91[H01J]
4939108 Process for producing dielectric ceramic composition with high dielectric constant, low dissipation factor and flat TC characteristicsExpiredNov 02, 88Jul 03, 90[C04B]
4882305 Dielectric ceramic composition with high dielectric constant and flat TC characteristicsExpiredOct 09, 87Nov 21, 89[C04B]
4840774 Process for the production of zirconium tetrachloride from dissociated zirconExpiredJun 26, 87Jun 20, 89[C01G]
4816430 Dielectric ceramic compositionExpiredJun 09, 87Mar 28, 89[C04B]
4785375 Temperature stable dielectric composition at high and low frequenciesExpiredJun 11, 87Nov 15, 88[C04B, H01G]
4780435 Dielectric ceramic compositions with linear temperature coefficient characteristics and low dissipation factorsExpiredApr 15, 87Oct 25, 88[C04B]
4766027 Method for making a ceramic multilayer structure having internal copper conductorsExpiredJan 13, 87Aug 23, 88[C04B, B32B]
4757759 Multilayer ceramic bar printing and assembling apparatusExpiredMar 05, 86Jul 19, 88[B41F]
4687044 Injection method and apparatusExpiredMay 03, 85Aug 18, 87[B22D]
4640905 Dielectric compositionsExpiredJan 07, 86Feb 03, 87[C04B]
4612600 Low fire ceramic compositionsExpiredOct 29, 84Sep 16, 86[C04B, H01G]
4540676 Low temperature fired dielectric ceramic composition with flat TC characteristic and method of makingExpiredMay 23, 84Sep 10, 85[C04B]

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