Dywidag-Systems International Pty Limited

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
 
 
E21D SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS 115
 
 
 
F16B DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING 148

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2011/0311,315 Friction Bolt AssemblyAbandonedAug 20, 08Dec 22, 11[E21D, F16B]
2011/0259,072 APPARATUS AND METHOD FOR MANUFACTURING A CABLE BOLTAbandonedDec 22, 09Oct 27, 11[D07B, B21F]
2011/0002,746 Method of Assessing a Multilayer Strata for Rock Bolt InstallationAbandonedJun 11, 10Jan 06, 11[E21D, G01R]
7458242 Apparatus and method for manufacturing a rock boltExpiredSep 06, 05Dec 02, 08[B21B]
7381013 Rock bolt post grouting apparatusExpiredAug 01, 03Jun 03, 08[E21D]
7338234 Rock boltExpiredDec 16, 05Mar 04, 08[E21D]
2007/0252,389 Duct Coupling AssemblyAbandonedApr 27, 06Nov 01, 07[F16L]
2003/0219,316 Rock boltAbandonedFeb 19, 03Nov 27, 03[E21D]

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