E21D9/002 - CPC Classification Index

ClassID:

135970 ⎘

E21D9/002 - CPC Classification

Classification description:

Tunnels or galleries, with or without linings; Methods or apparatus for making thereof ; Layout of tunnels or galleries; Improving soil or rock, e.g. by freezing; Injections Injection methods characterised by the chemical composition used

Recent Application in this class:

20260103981

2026-04-16

PRESSURE-CONTROLLED TUNNEL DIRECTIONAL GROUTING-BASED REINFORCEMENT DEVICES

20210043335

2021-02-11

Method and composition for limiting permeability of a matrix to limit liquid and gas inflow

20190256770

2019-08-22

Hydrogel biocement systems and methods

20180209113

2018-07-26

METHOD FOR IMPROVING THE MECHANICAL AND HYDRAULIC CHARACTERISTICS OF FOUNDATION GROUNDS OF EXISTING BUILT STRUCTURES

20180148624

2018-05-31

Use of a composition for stabilizing a geological formation in oil fields, gas fields, water pumping fields, mining or tunnel constructions