Patent DE386899C successfully refreshed from Google Patents.
DE386899C
Expired / Lapsed
DE
⏱️ 0.0 years remaining
Air suction and mixing device for ventilation of rooms
Assignee: Individual
•
Filing: —
•
Granted: 1923-12-18
•
Expires: 1940-12-18
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-11-05 13:53
CPC Classifications
F; F24; F24F; F24F7/00; F24F7/04; F24F7/06; F24F7/08
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.