Inventor
Ritsu Yasukawa
Inventor
Osaka, JP
Overview
Patents· 5 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
B01Dprimary
B01DSeparation42%
B01JChemical or physical processes, e.g. catalysis or colloid chemistry42%
F02BInternal-combustion piston engines8%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests8%
PatentTitleYear
6,045,765'Catalyst and method for catalytic reduction of nitrogen oxides'20005,853,679'Removal of nitrogen oxide from exhaust gas'19985,733,837'Catalyst for catalytic reduction of nitrogen oxides'19985,474,965'Catalyst for catalytic reduction of nitrogen oxide'19955,380,692'Catalyst for catalytic reduction of nitrogen oxide'1995Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1995–2000Patents assigned to PETROLEUM ENERGY CENTER FOUND (5)· patent assignee history
1995–2000Patents assigned to SAKAI CHEMICAL INDUSTRY CO (5)· patent assignee history
1995–1998Patents assigned to COSMO OIL CO LTD (4)· patent assignee history
1995–1998Patents assigned to AGENCY IND SCIENCE TECHN (3)· patent assignee history
1995–1998Based in Osaka, JP· patent location history
2000Based in Sakai, JP· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| PETROLEUM ENERGY CENTER FOUND | 5 | 1995–2000 |
| SAKAI CHEMICAL INDUSTRY CO | 5 | 1995–2000 |
| COSMO OIL CO LTD | 4 | 1995–1998 |
| AGENCY IND SCIENCE TECHN | 3 | 1995–1998 |
Locations
| Location | Patents | Span |
|---|---|---|
| Osaka, JP | 4 | 1995–1998 |
| Sakai, JP | 1 | 2000 |