Inventor
Craig A. Stevens
Inventor
Houston, TX, US
Overview
Patents· 14 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 bonds32%
C08CTreatment or chemical modification of rubbers18%
C08LCompositions of macromolecular compounds13%
C08GMacromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds11%
C10MLubricating compositions8%
C07FAcyclic, carbocyclic or heterocyclic compounds containing elements other than carbon, hydrogen, halogen, oxygen, nitrogen, sulfur, selenium or tellurium5%
C10NIndexing scheme associated with subclass c10m relating to lubricating compositions5%
B28BShaping clay or other ceramic compositions3%
E04CStructural elements3%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests3%
PatentTitleYear
7,550,537'Organo-dilithium compound and process for preparing the same'20097,285,596'Anionic polymerization diinitiator and process for preparing same'2007RE039617'Butadiene polymers having terminal functional groups'2007RE039559'Butadiene polymers having terminal functional groups'20076,349,522'Brick block and process and apparatus therefor'20025,543,472'Concurrent epoxidation and catalyst residue extraction'19965,460,739'Star polymer viscosity index improver for oil compositions'19955,458,792'Asymmetric triblock copolymer viscosity index improver for oil compositions'19955,458,791'Star polymer viscosity index improver for oil compositions'19955,405,911'Butadiene polymers having terminal functional groups'19955,393,843'Butadiene polymers having terminal functional groups'19955,360,875'Method for producing coupled asymmetric polymers'19945,194,530'Termination of anionic polymerization using hydrocarbon terminating agents'19935,151,475'Termination of anionic polymerization'1992Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1992–1996Patents assigned to SHELL OIL CO (9)· patent assignee history
1992–1996Based in Houston, TX, US· patent location history
2002Based in Derby, VT, US· patent location history
2007–2009Patents assigned to KRATON POLYMERS US LLC (3)· patent assignee history
2007Patents assigned to KRATON POLYMER US L L C (1)· patent assignee history
2007–2009Based in Katy, TX, US· patent location history
2007Based in Marietta, OH, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| SHELL OIL CO | 9 | 1992–1996 |
| KRATON POLYMERS US LLC | 3 | 2007–2009 |
| KRATON POLYMER US L L C | 1 | 2007 |
Locations
| Location | Patents | Span |
|---|---|---|
| Houston, Texas, US | 9 | 1992–1996 |
| Katy, Texas, US | 2 | 2007–2009 |
| Marietta, OH, US | 2 | 2007 |
| Derby, VT, US | 1 | 2002 |