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Inventor

Andrew H. M. Renfrew

Inventor
Bury, GB

Overview

14→
Patents
1976–2001
Patent span
Chemistry
Primary field (CPC C)

Patents· 14 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. pigments43%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests17%
D06PDyeing or printing textiles13%
Y10TTechnical subjects covered by former us classification7%
B41MPrinting, duplicating, marking, or copying processes3%
C07CAcyclic or carbocyclic compounds3%
C07DHeterocyclic compounds3%
C09DCoating compositions, e.g. paints, varnishes or lacquers3%
C09KMaterials for miscellaneous applications, not provided for elsewhere3%
G03GElectrography3%
PatentTitleYear
6,271,355'Amine pyrazole nickel phthalocyanine dyes for coloration'20015,820,661'Ink compositions containing disazo dyes'19985,703,215'Water-soluble dyes which are polymerizable containing molecules which contain a nucleophilic group and an electrophilic group'19975,474,580'Chemical compounds'19955,306,813'Reactive dyes having a bulky linker group'19945,171,852'Triphenodioxazine reactive dyes having sulphonate ester groups'19924,542,213'Triphenodioxazine acid dyes'19854,512,773'Cationic triphendioxazine dyes, methods for their manufacture and their use for dyeing cellulosic substrates'19854,472,575'Triphendioxazine dyestuffs'19844,391,754'Anthraquinone compounds'19834,182,720'Process for the preparation of homogentisic lactone'19804,147,510'Coloration process'19794,080,369'Disperse anthraquinone dyestuffs'19783,963,853'Pressure sensitive transfer sheet'1976

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1976Patents assigned to WIGGINS TEAPE LTD (1)· patent assignee history
1976–1979Based in Manchester, GB· patent location history
1978–1980Patents assigned to ICI LTD (3)· patent assignee history
1980Based in Blackley, GB· patent location history
1983–2001Patents assigned to ICI PLC (7)· patent assignee history
1983–2001Based in Bury, GB· patent location history
1984–1997Based in Lancashire, GB· patent location history
1995–1998Patents assigned to ZENECA LTD (3)· patent assignee history
1998Based in Greenmount, GB· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
ICI PLC71983–2001
ICI LTD31978–1980
ZENECA LTD31995–1998
WIGGINS TEAPE LTD11976
Locations
LocationPatentsSpan
Bury, GB51983–2001
Lancashire, GB41984–1997
Manchester, GB31976–1979
Greenmount, GB11998
Blackley, GB11980