Inventor
Long Li
Inventor
Beijing, CN
Overview
Patents· 3 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 bonds20%
C09KMaterials for miscellaneous applications, not provided for elsewhere20%
E21BEarth or rock drilling20%
B82YSpecific uses or applications of nanostructures10%
C01BNon-metallic elements10%
H01LSemiconductor devices10%
H10DInorganic electric semiconductor devices10%
PatentTitleYear
11,060,009Filtrate reducer for temperature-resistant calcium-resistant water-based drilling fluid used in oil and gas reservoir protection, drilling fluid, and uses thereof202111,053,424Temperature-resistant calcium-resistant water-based drilling fluid for oil and gas reservoir protection and use thereof20219,553,188'High-voltage semiconductor device with finger-shaped insulation structure'2017Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
2017Patents assigned to UNITED MICROELECTRONICS CORP (1)· patent assignee history
2017Based in Singapore, SG· patent location history
2021Patents assigned to CNPC ENG TECH RES & DEV CO LTD (2)· patent assignee history
2021Patents assigned to UNIV CHINA PETROLEUM EAST CHINA (2)· patent assignee history
2021Based in Beijing, CN· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| CNPC ENG TECH RES & DEV CO LTD | 2 | 2021 |
| UNIV CHINA PETROLEUM EAST CHINA | 2 | 2021 |
| UNITED MICROELECTRONICS CORP | 1 | 2017 |
Locations
| Location | Patents | Span |
|---|---|---|
| Beijing, CN | 2 | 2021 |
| Singapore, SG | 1 | 2017 |