Inventor
David Espinosa
Inventor
Houston, TX, US
Overview
Patents· 10 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
E21Bprimary
E21BEarth or rock drilling33%
C09KMaterials for miscellaneous applications, not provided for elsewhere25%
B01DSeparation8%
C08JWorking-up8%
G01LMeasuring force, stress, torque, work, mechanical power, mechanical efficiency, or fluid pressure8%
G01NInvestigating or analysing materials by determining their chemical or physical properties8%
G06FElectric digital data processing8%
PatentTitleYear
11,084,973Methods for hydrocarbon recovery202110,865,279Methods and systems for generating aqueous polymer solutions202010,822,539Methods for hydrocarbon recovery202010,626,320Methods for hydrocarbon recovery202010,619,087Methods for hydrocarbon recovery202010,436,693Portable apparatus and methods for analyzing injection fluids201910,344,129Methods and systems for generating aqueous polymer solutions201910,168,265Portable apparatus and methods for analyzing injection fluids20197,730,455'Method and apparatus for enforcing safety properties of computer programs by generating and solving constraints'20107,574,695'Performing checks on the resource usage of computer programs'2009Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
2009–2010Patents assigned to NTT DOCOMO INC (2)· patent assignee history
2009Based in Palo Alto, CA, US· patent location history
2010Based in Mountain View, CA, US· patent location history
2019–2021Patents assigned to CHEVRON USA INC (8)· patent assignee history
2019–2021Based in Houston, TX, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| CHEVRON USA INC | 8 | 2019–2021 |
| NTT DOCOMO INC | 2 | 2009–2010 |
Locations
| Location | Patents | Span |
|---|---|---|
| Houston, Texas, US | 8 | 2019–2021 |
| Mountain View, California, US | 1 | 2010 |
| Palo Alto, California, US | 1 | 2009 |