Inventor

Tak W. Leung

Inventor

Houston, TX, US

Overview

1990–2019

Patent span

Chemistry

Primary field (CPC C)

Patents· 35 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 bonds30%

C07CAcyclic or carbocyclic compounds23%

B01JChemical or physical processes, e.g. catalysis or colloid chemistry16%

Y02PClimate change mitigation technologies in the production or processing of goods13%

C07FAcyclic, carbocyclic or heterocyclic compounds containing elements other than carbon, hydrogen, halogen, oxygen, nitrogen, sulfur, selenium or tellurium11%

C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients2%

C08LCompositions of macromolecular compounds2%

C08JWorking-up1%

Y10TTechnical subjects covered by former us classification1%

PatentTitleYear

10,358,505Process for production of high melt flow propylene-based polymer and product from same2019 9,534,063'Procatalyst composition with substituted 1,2-phenylene aromatic diester internal donor and method'2017 9,441,058'Procatalyst composition with substituted amide ester internal electron donor'2016 9,434,799'Procatalyst composition with substituted 1,2-phenylene aromatic diester internal donor and method'2016 9,382,342'Procatalyst composition with alkoxyalkyl 2-propenoate internal electron donor and polymer from same'2016 9,382,343'Procatalyst composition with alkoxypropyl ester internal electron donor and polymer from same'2016 9,315,592'Process for producing procatalyst composition with alkoxyalkyl ester internal electron donor and product'2016 9,133,286'Production of substituted phenylene dibenzoate internal electron donor and procatalyst with same'2015 9,045,570'Procatalyst composition with substituted 1,2-phenylene aromatic diester internal donor and method'2015 8,697,827'Catalyst composition with halo-malonate internal electron donor and polymer from same'2014 8,633,126'Three and four atom bridged dicarbonate compounds as internal donors in catalysts for polypropylene manufacture'2014 8,604,144'Procatalyst composition with substituted amide ester internal electron donor'2013 8,604,235'Production of substituted phenylene aromatic diesters and compositions'2013 8,551,903'Amide ester internal electron donor and process'2013 8,536,290'Procatalyst composition with alkoxyalkyl 2-propenoate internal electron donor and polymer from same'2013 8,536,372'Procatalyst composition with substituted 1,2-phenylene aromatic diester internal donor and method'2013 8,507,717'Production of substituted phenylene aromatic diesters'2013 8,466,081'Halogenated amide ester and internal electron donor with same'2013 8,383,540'Catalyst composition with halo-malonate internal electron donor and polymer from same'2013 8,378,045'Thermoformed article with high stiffness and good optics'2013 8,288,304'Procatalyst composition with adamantane and method'2012 8,288,585'Procatalyst composition with substitute 1,2-phenylene aromatic diester internal donor and method'2012 8,263,520'Two atom bridged dicarbonate compounds as internal donors in catalysts for polypropylene manufacture'2012 8,247,341'Procatalyst composition with silyl glutarate and method'2012 8,088,872'Procatalyst composition including silyl ester internal donor and method'2012 5,874,640'Metal-ligand complex catalyzed processes'1999 5,741,944'Hydroformaylation processes'1998 5,741,945'Processes employing indicator ligands'1998 5,741,943'Hydroformylation processes employing indicator ligands'1998 5,741,942'Metal-ligand complex catalyzed processes'1998 5,731,472'Metal-ligand complex catalyzed processes'1998 5,288,918'Hydroformylation process'1994 5,194,660'Processes for producing carbamates and isocyanates'1993 5,179,223'Process for producing carbamates from oximes'1993 4,935,547'Homologation process making higher alcohols'1990

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1990–1999Patents assigned to UNION CARBIDE CHEM PLASTIC (10)· patent assignee history

1990–1994Based in Charleston, WV, US· patent location history

1998–2019Based in Houston, TX, US· patent location history

2012–2019Patents assigned to LEUNG TAK W (18)· patent assignee history

2012–2014Patents assigned to DOW GLOBAL TECHNOLOGIES LLC (16)· patent assignee history

2012–2019Patents assigned to TAO TAO (16)· patent assignee history

2012–2019Patents assigned to CHEN LINFENG (14)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
LEUNG TAK Wself	18	2012–2019
DOW GLOBAL TECHNOLOGIES LLC	16	2012–2014
TAO TAO	16	2012–2019
CHEN LINFENG	14	2012–2019
UNION CARBIDE CHEM PLASTIC	10	1990–1999

Locations

Location	Patents	Span
Houston, Texas, US	31	1998–2019
Charleston, WV, US	4	1990–1994