Patent US2131740A successfully refreshed from Google Patents.
Patent US2970250A successfully refreshed from Google Patents.
Patent CH553296A successfully refreshed from Google Patents.
CH553296A
Expired / Lapsed
CH
⏱️ 0.0 years remaining
PROCESS FOR SETTING A SUPPORT RING MADE OF TUEBBINGEN IN TUNNEL STRUCTURES AND DEVICE FOR PERFORMING THE PROCESS.
Assignee: Gewerk Eisenhuette Westfalia
•
Filing: 1972-02-22
•
Granted: —
•
Expires: 1992-02-22
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
CH
Data Source
google_patents
Last Synchronized
2026-11-08 11:44
CPC Classifications
E; E21; E21D; E21D11/00; E21D11/40
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.