Inventor

Christopher S. Liu

Inventor

Poughkeepsie, NY, US

Overview

1985–2017

Patent span

Chemistry

Primary field (CPC C)

Patents· 27 as inventor

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

C10Mprimary

C10MLubricating compositions31%

C10NIndexing scheme associated with subclass c10m relating to lubricating compositions29%

C08FMacromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds25%

C10LFuels not otherwise provided for8%

G06FElectric digital data processing3%

F02BInternal-combustion piston engines1%

H04LTransmission of digital information, e.g. telegraphic communication1%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests1%

PatentTitleYear

9,854,037Identifying workload and sizing of buffers for the purpose of volume replication2017 6,117,825'Polyisobutylene succinimide and ethylene-propylene succinimide synergistic additives for lubricating oils compositions'2000 5,567,211'Motor fuel detergent additives'1996 5,520,829'Lubricating oil containing dispersant viscosity index improver'1996 5,448,710'Dynamically configurable interface cards with variable memory size'1995 5,445,750'Lubricating oil composition containing the reaction product of an alkenylsuccinimide with a bis(hydroxyaromatic) substituted carboxylic acid'1995 5,075,383'Dispersant and antioxidant additive and lubricating oil composition containing same'1991 4,948,524'Dispersant anti-oxidant VI improver and lubricating oil composition containing same'1990 4,904,404'Lubricating oil containing viscosity index improver'1990 4,877,834'Lubricating oil containing a Mannich base'1989 4,845,157'Diesel fuel compositions containing polyolefin graft polymers'1989 4,842,756'Multifunctional viscosity index improver'1989 4,836,943'Anti-oxidant system'1989 4,826,613'Lubricating oil containing dispersant viscosity index improver'1989 4,812,261'Lubricating oil containing viscosity index improver'1989 4,798,678'Hydrocarbon containing anti-oxidant system'1989 4,795,577'Lubricating oil containing dispersant viscosity index improver'1989 4,790,948'Lubricating oil containing dispersant viscosity index improver'1988 4,780,230'Lubricating oil containing a mannich base'1988 4,769,043'Oil containing dispersant VII olefin copolymer'1988 4,767,553'Lubricating oil containing dispersant viscosity index improver'1988 4,764,304'Hydrocarbon compositions containing polyolefin graft polymers'1988 4,732,942'Hydrocarbon compositions containing polyolefin graft polymers'1988 4,715,975'Oil containing dispersant VII olefin copolymer'1987 4,668,412'Lubricating oil containing dispersant VII and pour depressant'1987 4,640,788'Hydrocarbon compositions containing polyolefin graft polymers'1987 4,500,440'Reaction products of glycidyl derivatized polyolefins and 5-aminotetrazoles and lubricating oils containing same'1985

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1985–1996Patents assigned to TEXACO INC (24)· patent assignee history

1985–2000Based in Poughkeepsie, NY, US· patent location history

1995Patents assigned to HEWLETT PACKARD CO (1)· patent assignee history

1995Based in Lincoln, CA, US· patent location history

2000Patents assigned to ETHYL CORP (1)· patent assignee history

2017Patents assigned to HITACHI LTD (1)· patent assignee history

2017Based in Redmond, WA, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
TEXACO INC	24	1985–1996
ETHYL CORP	1	2000
HEWLETT PACKARD CO	1	1995
HITACHI LTD	1	2017

Locations

Location	Patents	Span
Poughkeepsie, New York, US	25	1985–2000
Redmond, Washington, US	1	2017
Lincoln, California, US	1	1995