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Inventor

John E. Presgrave

Inventor
Todmorden, GB

Overview

5→
Patents
1988–2003
Patent span
Chemistry
Primary field (CPC C)

Patents· 5 as inventor

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

C09Dprimary
C09DCoating compositions, e.g. paints, varnishes or lacquers45%
C09BOrganic dyes or closely-related compounds for producing dyes, e.g. pigments36%
C07DHeterocyclic compounds9%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests9%
PatentTitleYear
6,605,144'High light- fastness yellow composition'20036,267,806'Dye compositions'20015,370,730'Dye composition and aqueous ink derived therefrom'19945,171,848'Salts of black trisazo dyes with alkyl amines having good solubility in organic liquids'19924,767,459'Ink'1988

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1988–1992Patents assigned to ICI PLC (2)· patent assignee history
1988Based in Bacup, GB· patent location history
1992–1994Based in Todmorden, GB· patent location history
1994–2001Patents assigned to ZENECA LTD (2)· patent assignee history
2001Based in Manchester, GB· patent location history
2003Patents assigned to AVECIA LTD (1)· patent assignee history
2003Based in Blackley, GB· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
ICI PLC21988–1992
ZENECA LTD21994–2001
AVECIA LTD12003
Locations
LocationPatentsSpan
Todmorden, GB21992–1994
Blackley, GB12003
Manchester, GB12001
Bacup, GB11988