CHEMICAL GROUTING CO., LTD.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
E02D FOUNDATIONS; EXCAVATIONS; EMBANKMENTS 617
 
  
 
E21D SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS 115
 
  
 
G01N INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES 1205

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
5435668 Method for controlling a final pile diameter in a cast-in-place of solidification pile by a jet processAug 26, 93Jul 25, 95[E02D]
5399056 Method for controlling a final pile diameter in a cast-in-place of solidification pileAug 26, 93Mar 21, 95[E02D]
5228809 Consolidating agent injecting apparatus and injecting apparatus for improving groundAug 05, 91Jul 20, 93[E02D]
5160220 Method of improving ground of large areaDec 23, 91Nov 03, 92[E02D]
5123782 Method of improving ground of large areaAug 06, 91Jun 23, 92[E02D]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2015/0093,199 Contaminated Soil Purification MethodAbandonedMar 19, 14Apr 02, 15[B09C]
7120565 Method and apparatus for determining figureExpiredSep 29, 00Oct 10, 06[G05B]
5797465 Multi-shaft drilling unitExpiredMar 05, 97Aug 25, 98[E21B]
5624550 Process for treating sludge and system for the sameExpiredAug 10, 95Apr 29, 97[C02F]
5575345 Multi shaft drilling unitExpiredNov 15, 94Nov 19, 96[E02D, E21B]
5462672 Process for treating sludge and system for the sameExpiredAug 12, 93Oct 31, 95[C02F]
5123783 Method of reusing slurryExpiredJun 28, 91Jun 23, 92[E02D]
5050320 Multi-shaft kneading auger systemExpiredOct 23, 89Sep 24, 91[E02F]
5006017 Method for improving ground of large section areaExpiredJan 29, 90Apr 09, 91[E02D]

Top Inventors for This Owner

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