Patent US3720994A successfully refreshed from Google Patents.
Patent US2710973A successfully refreshed from Google Patents.
Patent US3938757A successfully refreshed from Google Patents.
Patent DE658020C successfully refreshed from Google Patents.
DE658020C
Expired / Lapsed
DE
⏱️ 0.0 years remaining
Manufacture of red iron oxide pigments
Assignee: Kali Chemie AG
•
Filing: 1933-12-19
•
Granted: 1938-03-19
•
Expires: 1953-12-19
Abstract
No abstract record available.
Inventors
- 👤 Dr Bruno Uebler
Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-11-03 18:03
CPC Classifications
C; C01; C01G; C01G49/00; C01G49/02; C01G49/06
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.