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Inventor

Fumio Hanada

Inventor
Tokuyama, JP

Overview

4→
Patents
1990–2003
Patent span
Performing operations
Primary field (CPC B)

Patents· 4 as inventor

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

B01Dprimary
B01DSeparation30%
C08JWorking-up30%
B01JChemical or physical processes, e.g. catalysis or colloid chemistry10%
C02FTreatment of water, waste water, sewage, or sludge10%
D21CProduction of cellulose by removing non-cellulose substances from cellulose-containing materials10%
Y02EReduction of greenhouse gas [ghg] emissions, related to energy generation, transmission or distribution10%
PatentTitleYear
6,596,137'Bipolar membrane'20035,415,751'Method of producing acids and alkalis'19955,221,455'Bipolar membrane and method for its production'19934,923,611'Novel anion-exchange membrane'1990

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1990–1993Patents assigned to TOKUYAMA SODA KK (2)· patent assignee history
1990–2003Based in Tokuyama, JP· patent location history
1995Patents assigned to DAIO SEISHI KK (1)· patent assignee history
1995Patents assigned to TOKUYAMA CORP (1)· patent assignee history
2003Patents assigned to TOKOYAMA CORP (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
TOKUYAMA SODA KK21990–1993
DAIO SEISHI KK11995
TOKOYAMA CORP12003
TOKUYAMA CORP11995
Locations
LocationPatentsSpan
Tokuyama, JP41990–2003