Inventor

Katsumi Ohsumi

Inventor

Hitachi, JP

Overview

22→

Patents

1981–2002

Patent span

Physics

Primary field (CPC G)

Patents· 22 as inventor

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

G21Cprimary

G21CNuclear reactors36%

Y02EReduction of greenhouse gas [ghg] emissions, related to energy generation, transmission or distribution36%

G01NInvestigating or analysing materials by determining their chemical or physical properties9%

G21FProtection against x-radiation, gamma radiation, corpuscular radiation or particle bombardment7%

C23FNon-mechanical removal of metallic material from surface4%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests4%

C23CCoating metallic material2%

Y10TTechnical subjects covered by former us classification2%

PatentTitleYear

6,487,265'Treatment method of nuclear reactor internal component'2002 5,892,805'Boiling water reactor and its operating method'1999 5,761,263'Nuclear fuel rod and method of manufacturing the same'1998 5,715,290'Reactor water control method in BWR power plant, BWR power plant having low radioactivity concentration reactor water and fuel clad tube for BWR'1998 5,398,269'Water quality control method and device for nuclear power plant, and nuclear power plant'1995 5,398,268'Nuclear power plant having a water chemistry control system for a primary cooling system thereof and an operation method thereof'1995 5,203,984'Monitoring system for plant operation condition and its in-situ electrochemical electrode'1993 5,186,798'Solution quantitative analysis apparatus, quantitative analysis methods, and nuclear reactor water quality control system'1993 5,084,235'Direct cycle-type atomic power plant with means for suppressing transfer from a liquid phase to a vapor phase of radioactive nitrogen oxides'1992 4,940,564'Suppression of deposition of radioactive substances in boiling water type, nuclear power plant'1990 4,937,038'Solution quantitative analysis apparatus, quantitative analysis methods, and nuclear reactor water quality control system'1990 4,927,598'Radioactivity reduction method of a nuclear power plant and a nuclear power plant reduced in radioactivity'1990 4,894,202'Method of inhibiting radioactive substances from eluting into cooling water in a nuclear plant and an apparatus therefor'1990 4,880,595'Process and apparatus for cleaning nuclear reactor cooling water'1989 4,853,638'Water quality control method, and method and apparatus for measuring electrical conductivity used in the water quality control'1989 4,828,790'Inhibition of deposition of radioactive substances on nuclear power plant components'1989 4,820,473'Method of reducing radioactivity in nuclear plant'1989 4,764,338'Method for operating boiling water-type atomic power plant'1988 4,722,823'Nuclear power plant providing a function of suppressing the deposition of radioactive substance'1988 4,564,499'Method of inhibiting corrosion of carbon steel piping of condensate and feed water systems in power generating plant'1986 4,533,514'Nuclear reactor degassing method and degassing system'1985 4,293,382'Method of starting up a nuclear reactor'1981

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1981–2002Patents assigned to HITACHI LTD (22)· patent assignee history

1981–2002Based in Hitachi, JP· patent location history

1985–1992Patents assigned to HITACHI ENG CO LTD (3)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
HITACHI LTD	22	1981–2002
HITACHI ENG CO LTD	3	1985–1992

Locations

Location	Patents	Span
Hitachi, JP	22	1981–2002