DE721643C
Expired / Lapsed
DE
⏱️ 0.0 years remaining
Method and device for operating filter devices with a circuit washing device for the filter material
Assignee: WASSERREINIGUNG und WAERMETECH
•
Filing: 1938-07-21
•
Granted: 1942-06-12
•
Expires: 1958-07-21
Abstract
No abstract record available.
Inventors
- 👤 Fritz Umlauf
Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-11-06 09:14
CPC Classifications
B; B01; B01D; B01D24/00; B01D24/02; B01D24/10; B01D24/16; B01D24/28; B01D24/30; B01D24/46; B01D24/4668; B01D24/4689
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.