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Inventor

Dennis A. Barr

Inventor
Welwyn, GB

Overview

2→
Patents
1977–1980
Patent span
Chemistry
Primary field (CPC C)

Patents· 2 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 bonds67%
C07CAcyclic or carbocyclic compounds33%
PatentTitleYear
4,232,142'Production of polyarylene ether sulphones and ketones'19804,051,109'Aromatic polymers'1977

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1977–1980Patents assigned to ICI LTD (2)· patent assignee history
1977–1980Based in Welwyn, GB· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
ICI LTD21977–1980
Locations
LocationPatentsSpan
Welwyn, GB21977–1980