Patent FR51732E successfully refreshed from Google Patents.
FR51732E
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Optico-physical process for the simultaneous qualitative and quantitative examination of fields of variable density
Assignee: FIRME LUFTFAHRTFORSCHUNGSANSTA
•
Filing: 1941-08-28
•
Granted: 1943-04-09
•
Expires: 1961-08-28
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-10-23 18:37
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/41; G01N21/45
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.