FR634837A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Improvements in ventilation and heating of houses and other buildings with walls with cavities
Assignee: John Murray Leighton
•
Filing: 1927-05-21
•
Granted: 1928-02-27
•
Expires: 1947-05-21
Abstract
No abstract record available.
Inventors
- 👤 John Murray Leighton
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-11-04 03:16
CPC Classifications
F; F24; F24F; F24F7/00
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.