Inventor
Hans von Tobel
Inventor
Riehen, CH
Overview
Patents· 7 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. pigments44%
D06PDyeing or printing textiles25%
D21HPulp compositions13%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests13%
Y10TTechnical subjects covered by former us classification6%
PatentTitleYear
5,188,640'Use of 1-amino-2,7-di-[5\'-((2\"-chloro-4\"-substituted amino-1,3,5-triazin-6-ylamino)-2\'-sulfophenylazo]-8-hydroxynaphthalene-3 ,6-disulfonic acids for dyeing and printing'19935,095,101'1-Amino-2,7-di-[5\'-(2\"-chloro-4\"-substituted amino-1,3,5-triazin-6\"-ylamino)-2\'-sulfophenylazo]-3,6-disulfonic acids'19924,843,152'Copper complexes of disazo compounds having di- or tri- sulfonaphthol and 6-[2,4-di-(amino or substituted amino)-1,3,5-triazia-6-ylamino-]-1-hydroxy-3-sulfonaphthalene coupling component radicals'19894,699,626'Mixtures of copper complexes of disazo compounds: 4,4\'-(3,3\'-dihydroxybiphenylene) tetrazo component and disulfonaphthol and 3-sulfo-6-(2\'-chloro-4\'-chloro or hydroxy-1,3,5-triazin-6\'-ylamino)-naphth-1-ol coupling component'19874,213,897'Disazo and trisazo compounds having a 3-pyridinium or substituted pyridinium-4-methyl-6-hydroxypyridone-2 coupling component radical'19804,046,502'Basic disazo dyes having two 2-hydroxy-3-substituted carbamoylnaphthyl-1-azophenyl groups for dyeing paper'19774,000,158'Phthalocyanine compounds'1976Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1976–1993Patents assigned to SANDOZ LTD (6)· patent assignee history
1976–1993Based in Riehen, CH· patent location history
1980Patents assigned to SANDOZ AG (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| SANDOZ LTD | 6 | 1976–1993 |
| SANDOZ AG | 1 | 1980 |
Locations
| Location | Patents | Span |
|---|---|---|
| Riehen, CH | 7 | 1976–1993 |