FR830518A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Method for taking samples of sandy subsoils and similar terrams devoid of cohesion
Assignee: Bataafsche Petroleum Maatschappij NV
•
Filing: 1937-12-07
•
Granted: 1938-08-02
•
Expires: 1957-12-07
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-10-30 23:53
CPC Classifications
E; E21; E21B; E21B25/00; E21B25/08
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.