US3426562A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine for bending metal tubes
Assignee: Walker Manufacturing Co
•
Filing: 1960-09-01
•
Granted: 1969-02-11
•
Expires: 1980-09-01
Abstract
No abstract record available.
Inventors
- 👤 Floyd Inda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:43
CPC Classifications
B; B21; B21D; B21D7/00; B21D7/06; B21D7/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2306223A
Cited
US2306224A
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US2440599A
Cited
US2704394A
Cited
US2817384A
Cited
US2796909A
Cited
US2907102A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-11 | 1972-08-12 | 1973-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-11 | 1976-08-12 | 1977-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-11 | 1980-08-12 | 1981-02-11 | $7700.00 | Window Closed / Lapsed |