Inventor
Heinrich Hamal
Inventor
Liederbach, DE
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. pigments50%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests25%
C07DHeterocyclic compounds13%
C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients13%
PatentTitleYear
4,937,345'Process for the preparation of 2-(arylamino)-3-carboxy-9(10H)-acridones'19904,935,502'Diazo compounds, a process for their preparation and their use as colorants'19904,870,164'Symmetrical and asymmetrical disazo compounds having a bis-aryloxy alkane bridge'19894,231,964'Nitroamines, processes for their manufacture and their use as diazo components'19804,169,091'Symmetrical and asymmetrical disazo compounds containing a bis-(nitro-aryloxy)alkane middle component'1979Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1979–1990Patents assigned to HOECHST AG (5)· patent assignee history
1979–1990Based in Liederbach, DE· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| HOECHST AG | 5 | 1979–1990 |
Locations
| Location | Patents | Span |
|---|---|---|
| Liederbach, DE | 5 | 1979–1990 |