Patent DE806426C successfully refreshed from Google Patents.
DE806426C
Expired / Lapsed
DE
⏱️ 0.0 years remaining
Segment retaining wedge for anchoring the deep drilling rod during installation and removal
Assignee: ARNOLD VON POHL DIPL ING
•
Filing: 1949-12-03
•
Granted: 1952-02-21
•
Expires: 1969-12-03
Abstract
No abstract record available.
Inventors
- 👤 Dipl-Ing Arnold Von Pohl
Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-11-04 04:55
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/10
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.