LexDanaLexDanabeta
Inventor

Sotoo Kubo

Inventor
Tokyo, JP

Overview

3→
Patents
1980–1997
Patent span
Chemistry
Primary field (CPC C)

Patents· 3 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

C02Fprimary
C02FTreatment of water, waste water, sewage, or sludge75%
C23FNon-mechanical removal of metallic material from surface25%
PatentTitleYear
5,624,550'Process for treating sludge and system for the same'19975,462,672'Process for treating sludge and system for the same'19954,209,398'Water treating process'1980

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1980–1997Patents assigned to KURITA WATER IND LTD (3)· patent assignee history
1980Patents assigned to SANYO CHEMICAL IND LTD (1)· patent assignee history
1980–1997Based in Tokyo, JP· patent location history
1995–1997Patents assigned to CHEMICAL GROUT CO (2)· patent assignee history
1995–1997Patents assigned to FRONT ENGINEERING CO LTD (2)· patent assignee history
1997Patents assigned to SHOEISANGYO CORP (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
KURITA WATER IND LTD31980–1997
CHEMICAL GROUT CO21995–1997
FRONT ENGINEERING CO LTD21995–1997
SANYO CHEMICAL IND LTD11980
SHOEISANGYO CORP11997
Locations
LocationPatentsSpan
Tokyo, JP31980–1997