Patent DE2829894A1 successfully refreshed from Google Patents.
US2233233A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine for helically coiling and welding strip metal to form continuous pipes
Assignee: Individual
•
Filing: 1939-07-08
•
Granted: 1941-02-25
•
Expires: 1959-07-08
Abstract
No abstract record available.
Inventors
- 👤 Williams Ralph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:19
CPC Classifications
B; B21; B21C; B21C37/00; B21C37/06; B21C37/12; B21C37/122; B23; B23K; B23K11/00; B23K11/08; B23K11/082; B23K11/084
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
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1944-02-25 | 1944-08-26 | 1945-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-02-25 | 1948-08-26 | 1949-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-02-25 | 1952-08-26 | 1953-02-25 | $7700.00 | Window Closed / Lapsed |