Application

18460340 · MECHANICAL TUNNELING APPARATUS AND PROCESS FOR TUNNEL IN QUICKSAND STRATUM

Filed 2023-09-01 · Granted · Patent 11976558 (2024-05-07) The official file ↗The patent and its PDF ↗ · Art unit 3672 · Examiner Michael Alan Goodwin Typical · CPC E21D 9/001 · Shandong University · QQW-2

Office actions

first was Non-final rejection

RCEs

no appeal

To first action

3.0 mo

to disposition 8.2 mo

Statutes raised

112

2 actions read

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