Inventor
Denis S. Kopecki
Inventor
Spring, TX, US
Overview
Patents· 4 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
C23Cprimary
C23CCoating metallic material12%
E21BEarth or rock drilling12%
F03CPositive-displacement engines driven by liquids12%
F04CRotary-piston, or oscillating-piston, positive-displacement machines for liquids12%
F05CIndexing scheme relating to materials, material properties or material characteristics for machines, engines or pumps other than non-positive-displacement machines or engines12%
H02KDynamo-electric machines12%
Y10TTechnical subjects covered by former us classification12%
F16LPipes6%
G01VGeophysics6%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests6%
PatentTitleYear
9,843,244'Nitrogen- and ceramic-surface-treated components for downhole motors and related methods'20179,112,398'Nitrogen- and ceramic-surface-treated components for downhole motors and related methods'20156,710,600'Drillpipe structures to accommodate downhole testing'20044,872,519'Drill string drill collars'1989Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1989Patents assigned to EASTMAN CHRISTENSEN CO (1)· patent assignee history
1989Based in Salt Lake City, UT, US· patent location history
2004–2017Patents assigned to BAKER HUGHES INC (3)· patent assignee history
2004–2017Based in Spring, TX, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| BAKER HUGHES INC | 3 | 2004–2017 |
| EASTMAN CHRISTENSEN CO | 1 | 1989 |
Locations
| Location | Patents | Span |
|---|---|---|
| Spring, Texas, US | 3 | 2004–2017 |
| Salt Lake City, UT, US | 1 | 1989 |