Inventor
David Schwertner
Inventor
The Woodlands, TX, US
Overview
Patents· 6 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
C09Kprimary
C09KMaterials for miscellaneous applications, not provided for elsewhere60%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests20%
F17DPipe-line systems10%
Y10TTechnical subjects covered by former us classification10%
PatentTitleYear
7,977,281'Methods for minimizing the amount of graphite particles used during drilling operations'20117,393,813'Water-based drilling fluids using latex additives'20087,271,131'Fluid loss control and sealing agent for drilling depleted sand formations'20077,087,555'Drilling fluids comprising sized graphite particles'20065,851,958'Olefins and lubricants, rate of penetration enhancers, and spotting fluid additives for water-based drilling fluids'19985,605,879'Olefin isomers as lubricants, rate of penetration enhancers, and spotting fluid additives for water-based drilling fluids'1997Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1997–2011Patents assigned to BAKER HUGHES INC (5)· patent assignee history
1997–2011Based in The Woodlands, TX, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| BAKER HUGHES INC | 5 | 1997–2011 |
Locations
| Location | Patents | Span |
|---|---|---|
| The Woodlands, Texas, US | 6 | 1997–2011 |