Inventor
Yojiro Kumagae
Inventor
Osaka, JP
Overview
Patents· 16 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
C09Bprimary
C09BOrganic dyes or closely-related compounds for producing dyes, e.g. pigments23%
B41MPrinting, duplicating, marking, or copying processes16%
C07DHeterocyclic compounds16%
G11BInformation storage based on relative movement between record carrier and transducer12%
G03GElectrography7%
C09KMaterials for miscellaneous applications, not provided for elsewhere5%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests5%
Y10TTechnical subjects covered by former us classification5%
B32BLayered products, i.e. products built-up of strata of flat or non-flat, e.g. cellular or honeycomb, form2%
B41CProcesses for the manufacture or reproduction of printing surfaces2%
PatentTitleYear
11,015,061Phthalocyanine-based compound and uses of same20217,332,261'Phthalocyanine compound, process for preparing the same, and optical recording medium containing the same'20086,821,696'Toner for optical fixing, manufacturing method therefor and image formation apparatus using it'20046,468,713'Phthalocyanine compounds, process for producing the same, and near infrared absorbent comprising the same'20026,355,327'Optical recording medium and dipyrromethene metal chelate compound for use therein'20026,162,520'Optical recording medium and dipyrromethene metal chelate compound for use therein'20006,093,832'Diiminoisoindoline compound and the process for producing the compound and use thereof'20006,066,729'Photothermal conversion material'20005,973,140'Phthalocyanine compound, its intermediate, process for producing the compound, and use thereof'19995,804,102'Plasma display filter'19985,627,287'Phthalide compound and a near infrared absorber and a recording material each comprising the same compound'19975,438,032'Crystal modifications of 2-m-toluidino-3-methyl-6-di-n-butylaminofluoran, process for preparing thereof, and recording materials containing said crystal modifications'19955,376,617'Crystal modification of 2-(3-methylanilion)-3-methyl-6-diethylamino-fluoran, process for the preparation thereof, and recording materials containing said crystal modification'19945,342,967'Crystal modifications of 2-M-toluidino-3-methyl-6-di-N-butylaminofluoran, process for preparing thereof, and recording materials containing said crystal modifications'19945,338,866'Crystal modification of 2-(3-methylanilino)-3-methyl-6-diethylaminofluoran, process for the preparation thereof, and recording materials containing said crystal modification'19944,523,018'Certain bis(benzoyl)pyridine compounds'1985Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1985Patents assigned to YAMAMOTO KAGAKU GOSEI KK (1)· patent assignee history
1985–2002Based in Osaka, JP· patent location history
1994–2021Patents assigned to YAMAMOTO CHEMICALS INC (13)· patent assignee history
1998–2002Patents assigned to MITSUI CHEMICALS INC (5)· patent assignee history
1998–2002Based in Kawachinagano, JP· patent location history
2004Patents assigned to FUJI XEROX CO LTD (1)· patent assignee history
2004–2021Based in Yao, JP· patent location history
2008Patents assigned to CIBA SC HOLDING AG (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| YAMAMOTO CHEMICALS INC | 13 | 1994–2021 |
| MITSUI CHEMICALS INC | 5 | 1998–2002 |
| CIBA SC HOLDING AG | 1 | 2008 |
| FUJI XEROX CO LTD | 1 | 2004 |
| YAMAMOTO KAGAKU GOSEI KK | 1 | 1985 |
Locations
| Location | Patents | Span |
|---|---|---|
| Osaka, JP | 10 | 1985–2002 |
| Yao, JP | 3 | 2004–2021 |
| Kawachinagano, JP | 3 | 1998–2002 |