US1983584A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of shaping metal tubes
Assignee: Urschel Engineering Co
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Filing: 1930-03-29
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Granted: 1934-12-11
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Expires: 1950-03-29
Abstract
No abstract record available.
Inventors
- 👤 Bertis H Urschel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:34
CPC Classifications
B; B21; B21C; B21C37/00; B21C37/06; B21C37/15; B21D; B21D22/00; B21D22/02; B21D22/025
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) | 1937-12-10 | 1938-06-11 | 1938-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-12-10 | 1942-06-11 | 1942-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-12-10 | 1946-06-11 | 1946-12-11 | $7700.00 | Window Closed / Lapsed |