Patent DE537871C successfully refreshed from Google Patents.
DE537871C
Expired / Lapsed
DE
⏱️ 0.0 years remaining
Device for the harmless meshing of the exhaust gases from motor vehicles by means of several air-sucking pipe sections connected one behind the other and one inside the other
Assignee: GUSTAV DE GRAHL DR ING
•
Filing: 1930-06-25
•
Granted: 1932-02-18
•
Expires: 1950-06-25
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-11-09 09:18
CPC Classifications
F; F01; F01N; F01N3/00; 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.