Patent DE693349C successfully refreshed from Google Patents.
DE693349C
Expired / Lapsed
DE
⏱️ 0.0 years remaining
Ring disk made of thin sheet metal for fine edge filter
Assignee: Individual
•
Filing: 1937-09-24
•
Granted: 1940-07-06
•
Expires: 1957-09-24
Abstract
No abstract record available.
Inventors
- 👤 Hugo Laderer
Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-10-25 18:15
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/44; B01D29/46
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.