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Inventor

Robert A. Sewell

Inventor
Terneuzen, NL

Overview

8→
Patents
1977–1994
Patent span
Chemistry
Primary field (CPC C)

Patents· 8 as inventor

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

A01Nprimary
A01NPreservation of bodies of humans or animals or plants or parts thereof30%
C08GMacromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds30%
A47BTables10%
C07CAcyclic or carbocyclic compounds10%
C07DHeterocyclic compounds10%
D05BSewing10%
PatentTitleYear
5,374,705'Process for the preparation of polyether polyols with a reduced unsaturation content'19945,114,989'Isocyanate-terminated prepolymer and polyurethane foam prepared therefrom'19925,089,534'Process for preparing flexible polyurethane foam'19924,800,195'Substituted azo N-phenyl-N\'benzoylureas and their use as insecticides and acaricides'19894,795,746'Substituted N-phenyl-N\'benzoyl ureas and their use as insecticides and acaricides'19894,529,819'Method for making benzoylphenylureas'19854,342,770'Optically active isomers of substituted pyridine methyl esters of cyclopropane carboxylic acid and their use as insecticides'19824,018,487'Cam adjustment for tension spring of sewing machine head lifter mechanism'1977

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1977Patents assigned to KEYSTONE CONSOLIDATED IND INC (1)· patent assignee history
1977Based in Rockford, IL, US· patent location history
1982–1994Patents assigned to DOW CHEMICAL CO (7)· patent assignee history
1982–1985Based in King's Lynn, GB· patent location history
1989Based in Axel, NL· patent location history
1989Based in Paulus Potterpad, NL· patent location history
1992–1994Based in Terneuzen, NL· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
DOW CHEMICAL CO71982–1994
KEYSTONE CONSOLIDATED IND INC11977
Locations
LocationPatentsSpan
Terneuzen, NL31992–1994
King's Lynn, GB21982–1985
Axel, NL11989
Paulus Potterpad, NL11989
Rockford, Illinois, US11977