Patent CH86349A successfully refreshed from Google Patents.
CH86349A
Expired / Lapsed
CH
⏱️ 0.0 years remaining
Steam boiler system with a heat exchange device for preheating the combustion air.
Assignee: Constam Ernst
•
Filing: 1919-09-23
•
Granted: —
•
Expires: 1939-09-23
Abstract
No abstract record available.
Inventors
- 👤 Constam Ernst
Bibliographic Details
Application Number
—
Jurisdiction
CH
Data Source
google_patents
Last Synchronized
2026-10-27 18:52
CPC Classifications
F; F22; F22B; F22B31/00; F22B31/08
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.