Patent US1750644A successfully refreshed from Google Patents.
DE668014C
Expired / Lapsed
DE
⏱️ 0.0 years remaining
Device for introducing sludge into sludge digester
Assignee: LUDWIG BOXHORN
•
Filing: —
•
Granted: 1938-11-24
•
Expires: 1955-11-24
Abstract
No abstract record available.
Inventors
- 👤 Ludwig Boxhorn
- 👤 Werner Mueller
Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-11-06 06:30
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/28
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.