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Inventor

Keitaro Hirai

Inventor
Fukuyama, JP

Overview

2→
Patents
1978–1979
Patent span
Chemistry
Primary field (CPC C)

Patents· 2 as inventor

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

C21Bprimary
C21BManufacture of iron or steel25%
C22BProduction and refining of metals25%
F27BFurnaces, kilns, ovens or retorts in general25%
F27DDetails or accessories of furnaces, kilns, ovens or retorts, in so far as they are of kinds occurring in more than one kind of furnace25%
PatentTitleYear
4,138,022'Furnace top charging apparatus'19794,091,545'Method for removing water and grease deposit from rolling mill sludge'1978

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1978–1979Patents assigned to NIPPON KOKAN KK (2)· patent assignee history
1978Based in Yokohama, JP· patent location history
1979Based in Fukuyama, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
NIPPON KOKAN KK21978–1979
Locations
LocationPatentsSpan
Fukuyama, JP11979
Yokohama, JP11978