US2428237A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable hand-operated tube bending tool
Assignee: Imperial Brass Manufacturing Co
•
Filing: 1944-07-15
•
Granted: 1947-09-30
•
Expires: 1964-07-15
Abstract
No abstract record available.
Inventors
- 👤 Robert D Mcintosh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:51
CPC Classifications
B; B21; B21D; B21D7/00; B21D7/06; B21D7/063
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1879199A
Cited
US1438952A
Cited
US1824026A
Cited
GB417656A
Cited
US2127185A
Cited
US2083483A
Cited
US2171907A
Cited
US2232819A
Cited
US2345102A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-09-29 | 1951-03-31 | 1951-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-09-29 | 1955-03-31 | 1955-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-09-29 | 1959-03-31 | 1959-09-30 | $7700.00 | Window Closed / Lapsed |