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Patent Activity in the Last 10 Years


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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5841055 Method for controlled refining of explosive compositionsExpiredJun 11, 97Nov 24, 98[F42B]
5099763 Method of blastingExpiredJun 13, 91Mar 31, 92[F42G]
5071496 Low level blasting compositionExpiredMay 16, 90Dec 10, 91[C06B]
5014622 Blasting system and components thereforExpiredFeb 22, 90May 14, 91[F42B]
4962668 Material stress monitorExpiredMay 03, 89Oct 16, 90[G01B]
4858495 Multi-speed powershift transmissionExpiredJun 08, 88Aug 22, 89[F16H]
4815382 Connector and detonator/connector assembly for initiating explosive primers with low-energy detonating cordExpiredNov 25, 87Mar 28, 89[F42B, C06C]
4799428 Explosive primer unit for instantaneous initiation by low-energy detonating cordExpiredApr 06, 87Jan 24, 89[F42D, F42B, C06C]
4796533 Primer assemblyExpiredMay 06, 87Jan 10, 89[F42B, C06C]
4776276 Cast explosive primer initiatable by low-energy detonating cordExpiredMay 06, 87Oct 11, 88[F42B, C06C]
4718345 Primer assemblyExpiredMar 25, 85Jan 12, 88[F42B, C06C]
4714503 Emulsion-containing explosive compositionsExpiredOct 02, 86Dec 22, 87[C06B]
4646641 Explosive device and method of use thereforExpiredNov 04, 85Mar 03, 87[F42B]
4637312 Explosive primer and carrier thereforExpiredMay 01, 85Jan 20, 87[F42B, C06C]
4619721 Emulsion-containing explosive compositionsExpiredOct 15, 85Oct 28, 86[C06B]
4585496 Method of producing high-density slurry/prill explosives in boreholes and product made therebyExpiredMar 11, 85Apr 29, 86[C06B]
4555278 Stable nitrate/emulsion explosives and emulsion for use thereinExpiredJan 29, 85Nov 26, 85[C06B]
4509998 Emulsion blasting agent with amine-based emulsifierExpiredDec 27, 83Apr 09, 85[C06B]
4500370 Emulsion blasting agentExpiredDec 27, 83Feb 19, 85[C06B]
4495867 Assembly for initiating explosives with low-energy detonating cordExpiredJun 18, 82Jan 29, 85[C06C]

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