FR746798A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Improvement in silencers for internal combustion engines
Assignee: Sigismond Wilman
•
Filing: 1932-08-19
•
Granted: 1933-06-06
•
Expires: 1952-08-19
Abstract
No abstract record available.
Inventors
- 👤 Sigismond Wilman
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-10-31 20:12
CPC Classifications
F; F01; F01N; F01N1/00; F01N1/08; F01N1/12; F01N5/00; F01N5/02; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
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.