FR805769A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Differential protection devices for direct current lines and machines
Assignee: Compteurs Schlumberger SA
•
Filing: 1936-05-02
•
Granted: 1936-11-28
•
Expires: 1956-05-02
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-10-24 17:41
CPC Classifications
H; H02; H02H; H02H3/00; H02H3/26; H02H3/28
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.