Patent US409526A successfully refreshed from Google Patents.
Patent US4040431A successfully refreshed from Google Patents.
Patent CH271702A successfully refreshed from Google Patents.
CH271702A
Expired / Lapsed
CH
⏱️ 0.0 years remaining
Method for the formation of external threads and device for its implementation.
Assignee: Koull Alfred
•
Filing: 1948-03-20
•
Granted: —
•
Expires: 1968-03-20
Abstract
No abstract record available.
Inventors
- 👤 Koull Alfred
Bibliographic Details
Application Number
—
Jurisdiction
CH
Data Source
google_patents
Last Synchronized
2026-10-29 22:21
CPC Classifications
B; B21; B21C; B21C37/00; B21C37/06; B21C37/15; B21C37/20; B21C37/207; B21H; B21H3/00; B21H3/02; B21H3/04; B21H3/042
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.