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Inventor

Takafumi Hirakawa

Inventor
Ube, JP

Overview

11→
Patents
1992–2015
Patent span
Chemistry
Primary field (CPC C)

Patents· 11 as inventor

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

C08Gprimary
C08GMacromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds28%
C07DHeterocyclic compounds22%
C07CAcyclic or carbocyclic compounds17%
C08LCompositions of macromolecular compounds17%
G02BOptical elements, systems or apparatus17%
PatentTitleYear
9,012,537'Process for producing polyimide siloxane solution composition, and polyimide siloxane solution composition'20158,362,194'Polymerizable composition and polythiocarbonate polythioether'20138,349,995'Polythiocarbonatepoly(thio)epoxide'20137,544,761'Polythiourethane'20097,385,022'Polythiocarbonate polythiol'20085,994,553'Method for preparing 2-mercaptothiazole'19995,808,092'Process for preparing-1-ethyl-5-hydroxypyrazole'19985,250,707'Process for preparing .epsilon.-caprolactone'19935,245,029'Ion exchange purification method of aqueous caprolactam solution'19935,206,425'Process for preparing perpropionic acid solution'19935,098,607'Process for stabilizing percarboxylic acid'1992

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1992–2015Patents assigned to UBE INDUSTRIES (11)· patent assignee history
1992–2015Based in Ube, JP· patent location history
2008–2009Based in Minato-ku, JP· patent location history
2013–2015Patents assigned to HIRAKAWA TAKAFUMI (3)· patent assignee history
2013Patents assigned to MORIKAMI ATSUSHI (2)· patent assignee history
2013Patents assigned to WATANABE MASANORI (2)· patent assignee history
2015Patents assigned to HAYASHIDA TOMOKO (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
UBE INDUSTRIES111992–2015
HIRAKAWA TAKAFUMIself32013–2015
MORIKAMI ATSUSHI22013
WATANABE MASANORI22013
HAYASHIDA TOMOKO12015
Locations
LocationPatentsSpan
Ube, JP91992–2015
Minato-ku, JP22008–2009