Inventor

Hisao Okamoto

Inventor

Tokyo, JP

Overview

19→

Patents

1981–2017

Patent span

Chemistry

Primary field (CPC C)

Patents· 19 as inventor

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

C09Bprimary

C09BOrganic dyes or closely-related compounds for producing dyes, e.g. pigments31%

C09DCoating compositions, e.g. paints, varnishes or lacquers23%

G02BOptical elements, systems or apparatus8%

C06BExplosives or thermic compositions5%

C09CTreatment of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties5%

G03FPhotomechanical production of textured or patterned surfaces, e.g. for printing, for processing of semiconductor devices5%

G11BInformation storage based on relative movement between record carrier and transducer5%

B64GCosmonautics3%

C07BGeneral methods of organic chemistry3%

C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients3%

PatentTitleYear

9,822,266'Near infrared-reflecting/transmitting azo pigment, method for manufacturing near infrared-reflecting/transmitting azo pigment, colorant composition using said azo pigments, item-coloring method and colored item'2017 7,920,359'Magnetic recording apparatus with correlated main magnetic pole-to-shields spacing and main magnetic pole-to-medium layers spacing'2011 7,888,398'Pigment'2011 7,611,572'Pixel-forming colorant compositions and their use'2009 7,508,619'Magnetic head and magnetic disc drive'2009 7,361,698'Water-based pigment inks, image recording method, and image recording system'2008 6,821,334'Process for producing sulfonated solid particles'2004 6,726,762'Finely divided pigments and coloring compositions'2004 6,623,556'Near-infrared transmitting black azo pigments'2003 6,521,038'Near-infrared reflecting composite pigments'2003 6,471,766'Pigment dispersants and pigment compositions containing the same'2002 6,302,953'Pigment dispersions for color filters, fabrication process of color filters, and color filters'2001 6,299,676'Pigment dispersants, pigment dispersions and writing or recording pigment inks'2001 5,961,711'Pigment dispersant, pigment dispersion, and pigment dispersion for color filter'1999 5,905,101'Ablator compositions'1999 4,638,052'Azo-pigment containing hydroxy naphthoic acid amide and an iminooxoisoindolenine components'1987 4,424,085'Composite solid propellant containing FeOOH as burning rate modifier'1984 4,369,710'End-burning gas-generating composition grain containing intertwisted wires'1983 4,302,258'Composite propellant with 0.2.mu. or smaller metal fuel'1981

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1981–1999Patents assigned to NISSAN MOTOR (4)· patent assignee history

1981–1999Based in Sayama, JP· patent location history

1987–2017Patents assigned to DAINICHISEIKA COLOR CHEM (13)· patent assignee history

1999Patents assigned to SHINETSU CHEMICAL CO (1)· patent assignee history

1999–2017Based in Tokyo, JP· patent location history

2009Patents assigned to HITACHI GLOBAL STORAGE TECH (1)· patent assignee history

2009Based in Chuo-ku, JP· patent location history

2009Based in Kanagawa, JP· patent location history

2011Patents assigned to HITACHI GLOBAL STORAGE TECH NL (1)· patent assignee history

2011Based in Shizuoka, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
DAINICHISEIKA COLOR CHEM	13	1987–2017
NISSAN MOTOR	4	1981–1999
HITACHI GLOBAL STORAGE TECH	1	2009
HITACHI GLOBAL STORAGE TECH NL	1	2011
SHINETSU CHEMICAL CO	1	1999

Locations

Location	Patents	Span
Tokyo, JP	11	1999–2017
Sayama, JP	4	1981–1999
Shizuoka, JP	1	2011
Chuo-ku, JP	1	2009
Kanagawa, JP	1	2009