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Inventor

Derek Thorp

Inventor
Heywood, GB

Overview

10→
Patents
1987–2000
Patent span
Chemistry
Primary field (CPC C)

Patents· 10 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. pigments23%
C07DHeterocyclic compounds19%
C22BProduction and refining of metals15%
Y02PClimate change mitigation technologies in the production or processing of goods15%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests15%
B01JChemical or physical processes, e.g. catalysis or colloid chemistry4%
B41MPrinting, duplicating, marking, or copying processes4%
D06PDyeing or printing textiles4%
PatentTitleYear
6,139,752'Composition and method for selectively removing metal ions from an aqueous solution'20005,342,937'Heterocyclic thione'19945,258,524'Bis-bibenzimidazole composition'19935,212,313'Polycyclic dyes'19935,196,392'Thermal transfer printing'19935,183,888'Polycyclic dyes'19935,084,580'Polycylic dyes'19925,074,911'Heterocyclic thione'19914,680,417'2.6-dioxo-2.6-dehydrobenzo[1:2-b,4:5-b]difurans'19874,650,882'Dyes having two 5-membered lactone rings fused to a central cyclohexa-1.4-diene nucleus'1987

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1987–1993Patents assigned to ICI PLC (7)· patent assignee history
1987–2000Based in Heywood, GB· patent location history
1991–1994Patents assigned to NERCO INC (2)· patent assignee history
1991Patents assigned to ICI LTD (1)· patent assignee history
1991–1993Based in Hopwood, GB· patent location history
1994–2000Patents assigned to ZENECA LTD (2)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
ICI PLC71987–1993
NERCO INC21991–1994
ZENECA LTD21994–2000
ICI LTD11991
Locations
LocationPatentsSpan
Heywood, GB71987–2000
Hopwood, GB31991–1993