FR667689A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Improvements to refrigeration machines
Assignee: Leon Grinberg
•
Filing: 1928-04-04
•
Granted: 1929-10-19
•
Expires: 1948-04-04
Abstract
No abstract record available.
Inventors
- 👤 Leon Grinberg
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-10-28 16:17
CPC Classifications
F; F25; F25B; F25B17/00; F25B17/02; F25B17/06
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.