Imine-type quaternary ammonium salt catalyst, preparation method thereof and use thereof for preparation of polyisocyanate composition
US-11059772-B2 · Jul 13, 2021 · US
This page is not indexed by search engines while we improve data quality.
Li Hefu patents
Li Hefu is listed as an inventor on 2 patents in our database. Major assignees and classification codes are summarized below.
| Metric | Value |
|---|---|
| Inventor | Li Hefu |
| Total patents | 2 |
| First publication | Dec 3, 2020 |
| Latest publication | Jul 13, 2021 |
Notable patents
Publications ranked by popularity score, then publication date.
Recent patents
Latest publications not already listed above.
No data yet.
Major assignees
Companies most often associated with this inventor's publications.
| Assignee | Patents |
|---|---|
| Wanhua Chemical Group Co Ltd | 2 |
Top CPC classifications
Most common classification codes across this inventor's patents.
| CPC | Patents |
|---|---|
| B01J31/04 | 2 |
| C07F7/12 | 2 |
| C08G18/7837 | 2 |
| C08G18/1875 | 2 |
| C08G18/1858 | 2 |