Inventor
Yuzo Maegawa
Inventor
Osaka, JP
Overview
Patents· 11 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
C07Cprimary
C07CAcyclic or carbocyclic compounds31%
C07DHeterocyclic compounds25%
C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients25%
B01DSeparation6%
C09KMaterials for miscellaneous applications, not provided for elsewhere6%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests6%
PatentTitleYear
5,241,103'Process for producing 1,4-dihydroxy-2-arylnaphthoate'19935,162,570'Process for producing 1,4-dihydroxy-2-arylnaphthoate'19925,049,604'Process for producing piperidine derivative and stabilized resin composition containing said derivative'19915,012,015'Process for producing 2,4-dichloro-3-alkyl-6-nitrophenol'19914,725,634'Stabilizer for synthetic resins'19884,719,037'Piperidine derivatives, production process therefor, and stabilizers for organic substances containing said derivatives as an active component'19884,695,407'Method for purifying 1-aminoanthraquinone'19874,670,488'Piperidine derivatives, their production and use as stabilizers'19874,670,489'Piperidine derivatives, their production and use as stabilizers'19874,323,431'Purification of compounds having high melting point'19824,297,508'Process for producing 2 hydroxy-naphthalene-3-carboxylic acid'1981Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1981–1993Patents assigned to SUMITOMO CHEMICAL CO (11)· patent assignee history
1981–1982Based in Oita, JP· patent location history
1987–1993Based in Osaka, JP· patent location history
1987–1991Based in Ibaraki, JP· patent location history
1987Based in Toyono-gun, JP· patent location history
1991–1992Patents assigned to DAIEI CHEMICAL CO LTD (2)· patent assignee history
1993Patents assigned to SUMIKA FINE CHEMICALS CO LTD (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| SUMITOMO CHEMICAL CO | 11 | 1981–1993 |
| DAIEI CHEMICAL CO LTD | 2 | 1991–1992 |
| SUMIKA FINE CHEMICALS CO LTD | 1 | 1993 |
Locations
| Location | Patents | Span |
|---|---|---|
| Osaka, JP | 6 | 1987–1993 |
| Ibaraki, JP | 2 | 1987–1991 |
| Oita, JP | 2 | 1981–1982 |
| Toyono-gun, JP | 1 | 1987 |