DE348289C
Expired / Lapsed
DE
⏱️ 0.0 years remaining
Counterflow cooler
Assignee: HEINRICH WIENGES DIPL ING
•
Filing: 1920-01-20
•
Granted: 1922-02-04
•
Expires: 1940-01-20
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-10-31 05:07
CPC Classifications
F; F28; F28D; F28D7/00; F28D7/08
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.