Inventor

Toshiyuki Hakata

Inventor

Hiroshima, JP

Overview

1987–2015

Patent span

Physics

Primary field (CPC G)

Patents· 17 as inventor

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

G03Gprimary

G03GElectrography23%

Y10TTechnical subjects covered by former us classification13%

H01FMagnets10%

B82YSpecific uses or applications of nanostructures8%

A61KPreparations for medical, dental or toiletry purposes5%

D21HPulp compositions5%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests5%

A61PSpecific therapeutic activity of chemical compounds or medicinal preparations3%

A62DChemical means for extinguishing fires or for combating or protecting against harmful chemical agents3%

B01JChemical or physical processes, e.g. catalysis or colloid chemistry3%

PatentTitleYear

9,127,168'Magnetic iron oxide fine particles, and magnetic particle-containing water dispersion and process for producing the same'2015 7,863,353'Paving resin composition, paving asphalt composition, and method for producing paving asphalt composition'2011 7,670,676'Pharmaceutical raw material'2010 6,506,531'Magnetic carrier'2003 6,485,877'Magnetic particles and magnetic carrier for electrophotographic developer'2002 6,465,390'Porous composite particles and process for producing the same'2002 6,459,012'Method for treating organohalogen compound-containing soil or ash'2002 6,106,987'Magnetic particles and magnetic carrier for electrophotographic developer'2000 6,087,057'Magnetic particles and magnetic carrier for electrophotographic developer'2000 6,042,982'Electrophotographic magnetic carrier and process for producing the same'2000 6,017,667'Spherical-like composite particles and electrophotographic magnetic carrier'2000 5,731,085'Spherical magnetic composite particles'1998 5,654,120'Magnetic carrier for electrophotography'1997 5,118,587'Magnetic particles used for electrostatic latent image developer and process for producing the same'1992 5,108,862'Composite carrier particles for electrophotography and process for producing the same'1992 5,079,303'Surface treatment agent for paper'1992 4,654,386'Ketene dimer-acrylamide polymer aqueous dispersion'1987

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1987–1992Patents assigned to DIC HERCULES CHEMICALS INC (2)· patent assignee history

1987Based in Ichihara, JP· patent location history

1992–2015Patents assigned to TODA KOGYO CORP (14)· patent assignee history

1992Patents assigned to UNITIKA LTD (1)· patent assignee history

1992–2011Based in Hiroshima, JP· patent location history

2003Patents assigned to CANON KK (1)· patent assignee history

2015Based in Otake, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
TODA KOGYO CORP	14	1992–2015
DIC HERCULES CHEMICALS INC	2	1987–1992
CANON KK	1	2003
UNITIKA LTD	1	1992

Locations

Location	Patents	Span
Hiroshima, JP	15	1992–2011
Otake, JP	1	2015
Ichihara, JP	1	1987