Patent EP0182587A2 successfully refreshed from Google Patents.
Patent DE600676C successfully refreshed from Google Patents.
DE600676C
Expired / Lapsed
DE
⏱️ 0.0 years remaining
Coal and rock drill bits with two cutting edges at an unequal distance from the drill axis
Assignee: UNION GES fur BERGWERKS und H
•
Filing: —
•
Granted: 1934-07-28
•
Expires: 1951-07-28
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-11-03 14:11
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/44
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.