FR537960A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Automotive headlight improvements
Assignee: Stephen Grebel
•
Filing: 1921-07-05
•
Granted: 1922-06-01
•
Expires: 1941-07-05
Abstract
No abstract record available.
Inventors
- 👤 Stephen Grebel
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-11-09 13:04
CPC Classifications
F; F21; F21V; F21V14/00; F21V14/02; F21S; F21S41/00; F21S41/20; F21S41/29; F21S41/40; F21S41/47
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.