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Inventor

Douglas D. Klendworth

Inventor
West Chester, OH, US

Overview

29→
Patents
1987–2019
Patent span
Chemistry
Primary field (CPC C)

Patents· 29 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 bonds51%
B01JChemical or physical processes, e.g. catalysis or colloid chemistry19%
C10GCracking hydrocarbon oils6%
C01PIndexing scheme relating to structural and physical aspects of solid inorganic compounds4%
B82YSpecific uses or applications of nanostructures2%
C01BNon-metallic elements2%
C01FCompounds of the metals beryllium, magnesium, aluminium, calcium, strontium, barium, radium, thorium, or of the rare-earth metals2%
C07CAcyclic or carbocyclic compounds2%
C08JWorking-up2%
C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients2%
PatentTitleYear
10,358,513High activity Ziegler-Natta catalysts, process for producing catalysts and use thereof20197,402,546'Magnesium chloride support'20087,071,137'Method of making a ziegler-natta catalyst'20066,979,718'Process for making polyolefin compositions containing exfoliated clay'20056,967,231'Olefin polymerization process'20056,800,703'Method for preparing propylene polymers having broad molecular weight distribution'20046,656,995'Process for producing olefin polymer composites having improved melt strength'20036,646,072'Process for making polyolefin compositions containing exfoliated clay'20036,630,544'Propylene polymerization process with enhanced catalyst activity'20036,395,669'Catalyst component and system'20026,093,673'Polymerization system with organosilicon compound'20005,534,472'Vanadium-containing catalyst system'19965,221,654'Fluorided aluminas, catalysts, and polymerization processes'19935,221,655'Florided aluminas, catalysts, and polymerization processes'19935,221,720'Fluorided aluminas, catalysts, and polymerization processes'19935,219,817'Fluorided aluminas, catalysts, and polymerization processes'19935,219,962'Fluorided aluminas, catalysts, and polymerization processes'19935,171,798'Fluorided aluminas, catalysts, and polymerization processes'19925,141,624'Catalytic cracking process'19925,104,949'Supported polymerization catalyst'19925,051,388'Supported polymerization catalyst'19915,043,514'Ethylene dimerization and polymerization'19915,001,204'Alumina phosphated with partial ester'19914,960,748'Alumina phosphated with partial ester'19904,820,785'In situ comonomer generation in olefin polymerization'19894,788,171'Phosphated calcined alumina'19884,735,931'In situ comonomer generation in olefin polymerization'19884,693,991'Hydrotreating catalyst composition'19874,655,906'Hydrotreating process employing a novel catalytic composition'1987

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1987–1993Patents assigned to PHILLIPS PETROLEUM CO (15)· patent assignee history
1987–1991Based in Bartlesville, OK, US· patent location history
1991–1996Patents assigned to QUANTUM CHEM CORP (3)· patent assignee history
1991–1992Based in Wauponsee Twp., Grundy County, IL, US· patent location history
1991Based in Morris, IL, US· patent location history
1992Based in Erie, IL, US· patent location history
1993–2019Based in West Chester, OH, US· patent location history
2000–2008Patents assigned to EQUISTAR CHEM LP (9)· patent assignee history
2019Patents assigned to JOHNSON KENNETH W (1)· patent assignee history
2019Patents assigned to KLENDWORTH DOUGLAS D (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
PHILLIPS PETROLEUM CO151987–1993
EQUISTAR CHEM LP92000–2008
QUANTUM CHEM CORP31991–1996
JOHNSON KENNETH W12019
KLENDWORTH DOUGLAS Dself12019
Locations
LocationPatentsSpan
West Chester, OH, US171993–2019
Bartlesville, OK, US71987–1991
Erie, Illinois, US21992
Wauponsee Twp., Grundy County, Illinois, US21991–1992
Morris, Illinois, US11991