Patent US1927547A successfully refreshed from Google Patents.
Patent DE952299C successfully refreshed from Google Patents.
DE952299C
Expired / Lapsed
DE
⏱️ 0.0 years remaining
Support structure, in particular building ceiling or roof covering, made of adjacent lightweight concrete panels
Assignee: Internationella Siporex AB
•
Filing: 1953-06-27
•
Granted: 1956-11-15
•
Expires: 1973-06-27
Abstract
No abstract record available.
Inventors
- 👤 Karl Gustav Olsson
Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-11-04 13:53
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/38; E04B1/61; E04B1/6108; E04B1/6116
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.