Patent US5380037A successfully refreshed from Google Patents.
Patent US2083819A successfully refreshed from Google Patents.
Patent FI26504A successfully refreshed from Google Patents.
Patent US2039290A successfully refreshed from Google Patents.
Patent DE452903C successfully refreshed from Google Patents.
DE452903C
Expired / Lapsed
DE
⏱️ 0.0 years remaining
Poppet valve
Assignee: Individual
•
Filing: 1924-10-22
•
Granted: 1927-11-22
•
Expires: 1944-10-22
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-11-03 09:23
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/32; F16K1/34; F16K1/36; F16K1/38
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.