Northwest Pipe Company

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
 
 
E21B EARTH OR ROCK DRILLING 195
 
 
 
F16L PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL169

Top Patents (by citation)

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Recent Publications

Publication # Title Filing Date Pub Date Intl Class
2017/0321,834 PIPE RAM JOINTMay 08, 17Nov 09, 17[F16L, E21B]

Recent Patents

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2010/0253,083 In-pipe hydro-electric power system, turbine and improvementAbandonedMar 19, 10Oct 07, 10[F03B]
6422783 Breakaway post slipbaseExpiredDec 29, 00Jul 23, 02[E01F]

Top Inventors for This Owner

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