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Inventor

Christian S. Harstick

Inventor
Crestwood, MO, US

Overview

3→
Patents
1981–1996
Patent span
Chemistry
Primary field (CPC C)

Patents· 3 as inventor

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

C10Mprimary
C10MLubricating compositions27%
C10NIndexing scheme associated with subclass c10m relating to lubricating compositions27%
C07GCompounds of unknown constitution9%
C08FMacromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds9%
C08GMacromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds9%
C08LCompositions of macromolecular compounds9%
C10LFuels not otherwise provided for9%
PatentTitleYear
5,534,174'Graft copolymer comprising a star-shaped polymer and an n-allyl amide'19965,166,439'Composition containing a mannich base of a partially sulfurized hindered phenol mixture'19924,278,555'Lubricant composition'1981

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1981Patents assigned to ETHYL CORP (1)· patent assignee history
1981–1992Based in Crestwood, MO, US· patent location history
1992–1996Patents assigned to ETHYL PETROLEUM ADDITIVES INC (2)· patent assignee history
1996Based in St. Louis, MO, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
ETHYL PETROLEUM ADDITIVES INC21992–1996
ETHYL CORP11981
Locations
LocationPatentsSpan
Crestwood, MO, US21981–1992
St. Louis, MO, US11996