US940914A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for forming hollow sheet-metal bodies.
Assignee: Individual
•
Filing: 1908-06-25
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Granted: 1909-11-23
•
Expires: 1928-06-25
Abstract
No abstract record available.
Inventors
- 👤 Amos Calleson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:39
CPC Classifications
B; B21; B21D; B21D39/00; B21D39/08; B21D39/20
Claims Analysis
Total Claims: 0
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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) | 1912-11-22 | 1913-05-24 | 1913-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1916-11-22 | 1917-05-24 | 1917-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1920-11-22 | 1921-05-24 | 1921-11-23 | $7700.00 | Window Closed / Lapsed |