Inventor
Chau-Hwa Yang
Inventor
Hopewell Junction, NY, US
Overview
Patents· 4 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
C07Cprimary
C07CAcyclic or carbocyclic compounds40%
H10PGeneric processes or apparatus for the manufacture or treatment of devices covered by class h1040%
B01JChemical or physical processes, e.g. catalysis or colloid chemistry20%
PatentTitleYear
5,431,772'Selective silicon nitride plasma etching process'19955,188,704'Selective silicon nitride plasma etching'19935,013,764'Catalyst and method for producing lower aliphatic alcohols'19914,914,072'Phosphorus/titania/zirconia catalyst for preparation of linear polyethylenepolyamines'1990Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1990–1991Patents assigned to TEXACO INC (2)· patent assignee history
1990–1995Based in Hopewell Junction, NY, US· patent location history
1993–1995Patents assigned to IBM (2)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| IBM | 2 | 1993–1995 |
| TEXACO INC | 2 | 1990–1991 |
Locations
| Location | Patents | Span |
|---|---|---|
| Hopewell Junction, New York, US | 4 | 1990–1995 |