Patent US3800239A successfully refreshed from Google Patents.
Patent DE471541C successfully refreshed from Google Patents.
DE471541C
Expired / Lapsed
DE
⏱️ 0.0 years remaining
Safety valve with high lift area controlled by an auxiliary valve
Assignee: H Maihak AG
•
Filing: —
•
Granted: 1929-02-13
•
Expires: 1946-02-13
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-10-31 13:09
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/02; F16K17/04; F16K17/08
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.