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Inventor

Douglas W. Chapman

Inventor
St. Louis, MO, US

Overview

3→
Patents
1978–1986
Patent span
Chemistry
Primary field (CPC C)

Patents· 3 as inventor

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

C07Cprimary
C07CAcyclic or carbocyclic compounds75%
Y02PClimate change mitigation technologies in the production or processing of goods25%
PatentTitleYear
4,571,437'Process for preparing p-aminophenol and alkyl substituted p-aminophenol'19864,415,753'Process for preparing p-aminophenol and alkyl substituted p-aminophenol'19834,112,238'Method for the preparation of pure 2-ethylhexyl gallate'1978

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1978–1986Patents assigned to MALLINCKRODT INC (3)· patent assignee history
1978–1986Based in St. Louis, MO, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
MALLINCKRODT INC31978–1986
Locations
LocationPatentsSpan
St. Louis, MO, US31978–1986