Patent DE681645C successfully refreshed from Google Patents.
DE681645C
Expired / Lapsed
DE
⏱️ 0.0 years remaining
Process for the preparation of a citric acid soluble phosphate fertilizer
Assignee: Hoechst AG Werk Kalle Albert
•
Filing: 1937-04-27
•
Granted: 1939-09-27
•
Expires: 1957-04-27
Abstract
No abstract record available.
Inventors
- 👤 Dr Hans Huber
Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-11-02 14:08
CPC Classifications
C; C05; C05B; C05B1/00; C05B1/02
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.