FR598525A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Modification to lamps with three electrodes used in t. s. f.
Assignee: Charles Mieville
•
Filing: 1924-09-12
•
Granted: 1925-12-18
•
Expires: 1944-09-12
Abstract
No abstract record available.
Inventors
- 👤 Charles Mieville
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-10-31 17:48
CPC Classifications
H; H01; H01J; H01J1/00; H01J1/02; H01J1/30
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.