OSCA, INC.

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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
RE34758 Travelling disc valve apparatusFeb 11, 93Oct 18, 94[E21B]
5137088 Travelling disc valve apparatusApr 30, 91Aug 11, 92[E21B]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6250302 Method and arrangement in connection with ventilatorExpiredNov 04, 98Jun 26, 01[G05B, A62B]
5785747 Viscosification of high density brinesExpiredJan 17, 97Jul 28, 98[C09K]
5609204 Isolation system and gravel pack assemblyExpiredJan 05, 95Mar 11, 97[E21B]
5579844 Single trip open hole well completion system and methodExpiredFeb 13, 95Dec 03, 96[E21B]
5055209 Reduction of the viscosity of solutions viscosified with Xanthan gum polymersExpiredMay 01, 89Oct 08, 91[E21B]
4938288 Non-damaging workover and completion fluidExpiredMay 05, 89Jul 03, 90[E21B]

Top Inventors for This Owner

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