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Inventor

John D. Stewart

Inventor
Friendswood, TX, US

Overview

18→
Patents
1987–2020
Patent span
Chemistry
Primary field (CPC C)

Patents· 18 as inventor

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

C08Fprimary
C08FMacromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds27%
B01JChemical or physical processes, e.g. catalysis or colloid chemistry12%
B60JWindows, windscreens, non-fixed roofs, doors, or similar devices for vehicles9%
B62DMotor vehicles9%
C09BOrganic dyes or closely-related compounds for producing dyes, e.g. pigments9%
LOC099%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests9%
C08LCompositions of macromolecular compounds6%
A01CPlanting3%
A01DHarvesting3%
PatentTitleYear
10,611,863Polymerization catalyst delivery202010,179,826Polymerization catalyst delivery20199,340,627'Elbow and horizontal configurations in a loop reactor'20169,303,099'Methods of controlling dual catalyst olefin polymerizations with an alcohol compound'20168,957,168'Methods for controlling dual catalyst olefin polymerizations with an alcohol compound'20158,932,527'Elbow and horizontal configurations in a loop reactor'20158,487,053'Methods for removing polymer skins from reactor walls'2013D0568165'Bottle and bottle top'2008D0540178'Bottle'2007D0518378'Bottle top'20066,617,403'Olefin polymerization process'20035,866,661'Ethylene polymerization processes and products thereof'19995,831,515'Electronic siren apparatus including an integrated handheld microphone and control handle'1998D0367435'Combined electronic siren and handheld microphone'19965,493,852'Lawnmower attachment spreader'19964,801,634'Production of pigmentary copper phthalocyanine'19894,801,638'Production of pigmentary copper phthalocyanine'19894,694,078'Production of pigmentary copper phthalocyanine'1987

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1987–1989Patents assigned to CIBA GEIGY CORP (3)· patent assignee history
1987–1989Based in Kempton Park, ZA· patent location history
1996–1998Based in Indianapolis, IN, US· patent location history
1999–2003Patents assigned to PHILLIPS PETROLEUM CO (2)· patent assignee history
1999–2020Based in Friendswood, TX, US· patent location history
2006–2008Based in Todos Santos, MX· patent location history
2007–2008Patents assigned to HOTEL CALIFORNIA TEQUILA S DE (2)· patent assignee history
2007Based in Baja California, MX· patent location history
2013–2016Patents assigned to CHEVRON PHILLIPS CHEMICAL CO (5)· patent assignee history
2019–2020Patents assigned to CHEVRON PHILLIPS CHEMICAL CO LP (2)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
CHEVRON PHILLIPS CHEMICAL CO52013–2016
CIBA GEIGY CORP31987–1989
CHEVRON PHILLIPS CHEMICAL CO LP22019–2020
HOTEL CALIFORNIA TEQUILA S DE22007–2008
PHILLIPS PETROLEUM CO21999–2003
Locations
LocationPatentsSpan
Friendswood, Texas, US91999–2020
Todos Santos, MX22006–2008
Indianapolis, IN, US21996–1998
Kempton Park, ZA21987–1989
Baja California, MX12007