Inventor
Zhenzhou Yang
Inventor
Beijing, CN
Overview
Patents· 7 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 elsewhere44%
E21BEarth or rock drilling31%
C08FMacromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds25%
PatentTitleYear
10,829,680High density and high temperature emulsifier for use in an oil based drilling fluid system202010,815,419Method for a fracturing fluid system at high temperatures202010,450,501Method for a fracturing fluid system at high temperatures201910,280,357High density and high temperature emulsifier for use in an oil based drilling fluid system201910,066,151Method for a fracturing fluid system at high temperatures20189,963,630Method for a fracturing fluid system at high temperatures20189,909,050'High density and high temperature emulsifier for use in an oil based drilling fluid system'2018Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
2018–2020Patents assigned to CNPC USA CORP (7)· patent assignee history
2018–2020Based in Beijing, CN· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| CNPC USA CORP | 7 | 2018–2020 |
Locations
| Location | Patents | Span |
|---|---|---|
| Beijing, CN | 7 | 2018–2020 |