US2422338A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe end forming machine
Assignee: Individual
•
Filing: 1944-08-04
•
Granted: 1947-06-17
•
Expires: 1964-08-04
Abstract
No abstract record available.
Inventors
- 👤 Edwin S Christensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:38
CPC Classifications
B; B23; B23K; B23K7/00; B23K7/005; B23K7/006; B23K7/007; B23Q; B23Q27/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49805
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
DE412788C
Cited
US831078A
Cited
US1661274A
Cited
US1985080A
Cited
US1963537A
Cited
US1966403A
Cited
US1954549A
Cited
US2015246A
Cited
US2057612A
Cited
DE681494C
Cited
US2334301A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-06-16 | 1950-12-16 | 1951-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-06-16 | 1954-12-16 | 1955-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-06-16 | 1958-12-16 | 1959-06-17 | $7700.00 | Window Closed / Lapsed |