CH268909A
Expired / Lapsed
CH
⏱️ 0.0 years remaining
Process for the production of sand cores for foundry technology using sulphite waste liquor.
Assignee: Oel Und Chemie Werk Ag
•
Filing: 1943-05-01
•
Granted: —
•
Expires: 1963-05-01
Abstract
No abstract record available.
Inventors
- 👤 Ag Oel-Und Chemie-Werk
Bibliographic Details
Application Number
—
Jurisdiction
CH
Data Source
google_patents
Last Synchronized
2026-10-31 19:37
CPC Classifications
B; B22; B22C; B22C1/00; B22C1/16; B22C1/20; B22C1/26
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.