Inventor

Shivakumar B. Hendi

Inventor

Newark, DE, US

Overview

1994–2003

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. pigments61%

C07DHeterocyclic compounds29%

C09DCoating compositions, e.g. paints, varnishes or lacquers6%

C09CTreatment of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties3%

PatentTitleYear

6,626,990'Use of aromatic compounds as phase directors and particle size reducers for quinacridone pigments'2003 6,441,174'Process for preparing bis(hydroxymethyl)perylenetetracarboximide'2002 6,361,594'Direct preparation of pyrrolo3,4-Cpyrroles'2002 6,348,595'Process for preparing'2002 6,313,300'Oxidation process for preparing quinacridone pigments'2001 6,248,165'Mixed crystals and solid solutions of 1,4-diketopyrrolopyrroles'2001 6,057,449'Direct preparation of pyrrolo[3,4-c]pyrroles'2000 6,036,766'Mixed crystals and solid solutions of 1,4-diketopyrrolopyrroles'2000 5,919,945'Process for preparing diketopyrrolopyrrole derivatives'1999 5,840,907'Process for preparing diketopyrrolopyrrole derivatives'1998 5,827,364'Pigment compositions'1998 5,785,750'1,4-diketo-3,6-diarylpyrolo›3,4-c! pyrrole'1998 5,786,487'1,4-diketo-3,6-diarylpyrolo›3,4-C!pyrrole pigment derivatives'1998 5,618,343'Pigment compositions for coatings'1997 5,529,623'Pigmentary solid solutions of pyrrolo[3,4-c]pyrroles and quinacridones'1996 5,472,496'Solid solutions of pyrrolo-[3.4-c]-pyrroles with quinacridonequinones'1995 5,457,203'Pigmentary synthesis of quinacridone solid solutions'1995 5,424,429'Preparation of pigmentary 2,9-dichloroquinacridone'1995 5,281,269'Aqueous process for preparation of modified beta quinacridone'1994

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1994–1997Patents assigned to CIBA GEIGY CORP (6)· patent assignee history

1994–2003Based in Newark, DE, US· patent location history

1998–2003Patents assigned to CIBA SC HOLDING AG (13)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
CIBA SC HOLDING AG	13	1998–2003
CIBA GEIGY CORP	6	1994–1997

Locations

Location	Patents	Span
Newark, Delaware, US	19	1994–2003