DE681850C
Expired / Lapsed
DE
⏱️ 0.0 years remaining
Process for the production of quaternary nitrogen compounds
Assignee: IG Farbenindustrie AG
•
Filing: 1933-04-14
•
Granted: 1939-10-03
•
Expires: 1953-04-14
Abstract
No abstract record available.
Inventors
- 👤 Dr Friedrich Leuchs
- 👤 Dr Ludwig Taub
Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-10-24 15:07
CPC Classifications
A; A01; A01N; A01N31/00; A01N31/08; A01N31/12
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.