ENSIGN-BICKFORD COMPANY, THE

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
E21B EARTH OR ROCK DRILLING 294

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
6298913 Explosive pipe cutting deviceAug 26, 99Oct 09, 01[E21B]
5241891 Phaseable link carrier for explosive chargeSep 17, 92Sep 07, 93[E21B]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6347700 Composite package for explosive itemsExpiredMay 04, 00Feb 19, 02[F42B]
6244157 Wire carrier perforating gunExpiredAug 03, 99Jun 12, 01[E21B]
6098707 Perforation gun for well casingExpiredApr 24, 98Aug 08, 00[E21B]
5816747 Device for cutting a large diameter pipe and initiation manifold thereforExpiredMay 01, 96Oct 06, 98[E02D]
5689083 Obturating initiation fittingExpiredMay 09, 96Nov 18, 97[C06C]
5632348 Fluid activated detonating systemExpiredMar 18, 96May 27, 97[E21B]
5509356 Liner and improved shaped charge especially for use in a well pipe perforating gunExpiredJan 27, 95Apr 23, 96[B32B]
5505135 Low stress casing joint configurationExpiredJan 27, 95Apr 09, 96[F42B]
5477785 Well pipe perforating gunExpiredJan 27, 95Dec 26, 95[F42B, E21B]
5322018 Surface-initiating deflagrating materialExpiredSep 30, 93Jun 21, 94[C06D, F42B]
5189249 Gel propellant ammunitionExpiredNov 14, 91Feb 23, 93[C06B, F42B]
5187320 Fibrillatable PTFE in plastic-bonded explosivesExpiredDec 06, 91Feb 16, 93[C06B]
5133275 On board dinghy cradleExpiredNov 04, 91Jul 28, 92[B63B]
5129514 Flexible cord winding and packaging configuration and method for making such packageExpiredAug 12, 91Jul 14, 92[B65D, B65B]
5060573 Detonator assemblyExpiredDec 19, 90Oct 29, 91[F42B]
5005694 System for packaging detonating cord for transportExpiredJul 06, 89Apr 09, 91[B65D]
4979352 System and method for packaging detonating cord for transportExpiredMay 07, 90Dec 25, 90[B65B]
RE33446 Detonating cord transport systemExpiredJan 26, 88Nov 20, 90[B65D]
4895249 System and method for packaging detonating cord for transportExpiredOct 19, 87Jan 23, 90[B65D]
4885993 Shaped charge with bifurcated projection for detonating cordExpiredSep 29, 88Dec 12, 89[F42B]

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