FR922129A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Improvements to heat exchangers
Assignee: Alexandre Braun
•
Filing: 1945-12-15
•
Granted: 1947-05-30
•
Expires: 1965-12-15
Abstract
No abstract record available.
Inventors
- 👤 Alexandre Braun
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-10-23 14:31
CPC Classifications
F; F28; F28D; F28D9/00; F28D9/0025
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.