Patent DE336531C successfully refreshed from Google Patents.
DE336531C
Expired / Lapsed
DE
⏱️ 0.0 years remaining
Flap valve
Assignee: KUHLMANN FA W
•
Filing: 1919-08-29
•
Granted: 1921-05-03
•
Expires: 1939-08-29
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-11-01 22:54
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/16; F16K1/18; F16K1/20; F16K1/2014; F16K1/2042; F16K1/205
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.