DE319305C
Expired / Lapsed
DE
⏱️ 0.0 years remaining
Device for utilizing the exhaust air from mining machines for ventilation purposes
Assignee: WAGNER ALFRED EISENHANDEL
•
Filing: 1918-10-29
•
Granted: 1920-03-02
•
Expires: 1938-10-29
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-11-09 05:15
CPC Classifications
F; F04; F04D; F04D25/00; F04D25/02; F04D25/04; F04D29/00; F04D29/40; F04D29/52; F04D29/54; F04D29/541; F04F; F04F5/00; F04F5/44; F04F5/46; F04F5/467
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.