DE867068C
Expired / Lapsed
DE
⏱️ 0.0 years remaining
Device for cleaning erasers
Assignee: Individual
•
Filing: 1942-08-01
•
Granted: 1953-02-16
•
Expires: 1962-08-01
Abstract
No abstract record available.
Inventors
- 👤 Erwin O Haberfeld
Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-11-03 08:58
CPC Classifications
B; B43; B43L; B43L19/00; B43L19/0037
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2163788A
Cited
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.