Patent US5131579A successfully refreshed from Google Patents.
FR49569E
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Improvements in the construction of silencers for internal combustion engines and the like
Assignee: Zygmunt Wilman
•
Filing: 1938-05-27
•
Granted: 1939-05-11
•
Expires: 1958-05-27
Abstract
No abstract record available.
Inventors
- 👤 Zygmunt Wilman
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-10-23 18:11
CPC Classifications
F; F01; F01N; F01N1/00; F01N1/02; F01N1/08; F01N1/12; F01N1/24; F01N2490/00; F01N2490/15; F01N2490/155; F01N2490/20
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.