Patent US1592784A successfully refreshed from Google Patents.
US2115441A
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Method of forming tubular structures from sheet metal
Assignee: Trailer Company of America
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Filing: 1937-02-01
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Granted: 1938-04-26
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Expires: 1957-02-01
Abstract
No abstract record available.
Inventors
- 👤 James J Biack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:38
CPC Classifications
B; B21; B21D; B21D5/00; B21D5/02; B21C; B21C37/00; B21C37/06; B21C37/08; B21C37/0803; B21C37/10; B21C37/104; B21C37/15; B21C37/155; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49016; Y10T29/49616; Y10T29/49623; Y10T29/49634
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) | 1941-04-25 | 1941-10-25 | 1942-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-04-25 | 1945-10-25 | 1946-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-04-25 | 1949-10-25 | 1950-04-26 | $7700.00 | Window Closed / Lapsed |