Patent US3975658A successfully refreshed from Google Patents.
Patent FR439869A successfully refreshed from Google Patents.
FR439869A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Reinforced concrete ceiling composed of reinforced concrete t-brackets
Assignee: Individual
•
Filing: 1912-02-08
•
Granted: 1912-06-26
•
Expires: 1932-02-08
Abstract
No abstract record available.
Inventors
- 👤 Adolf Kiefer
- 👤 Jacques Greutert
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-10-29 12:33
CPC Classifications
E; E04; E04B; E04B5/00; E04B5/02; E04B5/04; E04B5/06
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.