Patent DE552282C successfully refreshed from Google Patents.
DE552282C
Expired / Lapsed
DE
⏱️ 0.0 years remaining
Process for the preparation of water-insoluble azo dyes
Assignee: IG Farbenindustrie AG
•
Filing: 1928-08-26
•
Granted: 1932-06-10
•
Expires: 1948-08-26
Abstract
No abstract record available.
Inventors
- 👤 Dr Leopold Laska
- 👤 Dr Arthur Zitscher
Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-11-02 19:14
CPC Classifications
C; C09; C09B; C09B29/00; C09B29/10; C09B29/18; C09B29/20
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.