Cherrington Corporation

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Patent Activity in the Last 10 Years

Technologies

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

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
5375945 Method and apparatus for thrusting a pipeline into bore holeFeb 12, 93Dec 27, 94[F16L]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5375669 Method and apparatus for cleaning a boreholeExpiredFeb 12, 93Dec 27, 94[E21B]
5351764 Method and apparatus for enlarging an underground pathExpiredJan 10, 92Oct 04, 94[E21D]
5269384 Method and apparatus for cleaning a bore holeExpiredNov 08, 91Dec 14, 93[E21B]
5230388 Method and apparatus for cleaning a bore hole using a rotary pumpExpiredNov 08, 91Jul 27, 93[E21B]
5096002 Method and apparatus for enlarging an underground pathExpiredJul 26, 90Mar 17, 92[E21D]
RE33793 Apparatus and method for forming an enlarged underground arcuate bore and installing a conduit thereinExpiredJul 14, 89Jan 14, 92[E21B]

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