Patent US4051416A successfully refreshed from Google Patents.
FR794104A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Process for the preparation of washing muds which can be used in drilling technology
Assignee: Bataafsche Petroleum Maatschappij NV
•
Filing: 1935-08-22
•
Granted: 1936-02-08
•
Expires: 1955-08-22
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-11-03 04:45
CPC Classifications
E; E21; E21B; E21B21/00; E21B21/003
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.