Inventor
Takao Yanagisawa
Inventor
Osaka, JP
Overview
Patents· 5 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. pigments16%
C09DCoating compositions, e.g. paints, varnishes or lacquers16%
D21HPulp compositions16%
C07DHeterocyclic compounds11%
C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients11%
B41MPrinting, duplicating, marking, or copying processes5%
C07CAcyclic or carbocyclic compounds5%
D06LDry-cleaning, washing or bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods5%
D06NWall, floor, or like covering materials, e.g. linoleum, oilcloth, artificial leather, roofing felt, consisting of a fibrous web coated with a layer of macromolecular material5%
D06PDyeing or printing textiles5%
PatentTitleYear
6,488,867'Organic fluorescent whitening pigment composition having an excellent hiding power'20026,140,477'Near-infrared ray absorbing polyazo compound'20005,606,055'Organic white pigment'19975,514,213'Organic white pigment'19964,371,475'1,4-Bis-styryl-benzene derivatives and a process for the preparation of the same'1983Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1983Patents assigned to SHOWA KAGAKU KOGYO COMPANY LTD (1)· patent assignee history
1983Based in Izumiotsu, JP· patent location history
1996–2002Patents assigned to HAKKOL CHEMICAL CO LTD (4)· patent assignee history
1996Based in Izumi, JP· patent location history
1997–2002Based in Osaka, JP· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| HAKKOL CHEMICAL CO LTD | 4 | 1996–2002 |
| SHOWA KAGAKU KOGYO COMPANY LTD | 1 | 1983 |
Locations
| Location | Patents | Span |
|---|---|---|
| Osaka, JP | 3 | 1997–2002 |
| Izumi, JP | 1 | 1996 |
| Izumiotsu, JP | 1 | 1983 |