Patent US2449247A successfully refreshed from Google Patents.
US2449247A
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Method for forming tubular structures
Assignee: FCI USA LLC
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Filing: 1944-03-25
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Granted: 1948-09-14
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Expires: 1964-03-25
Abstract
No abstract record available.
Inventors
- 👤 Paucek Andrew Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:21
CPC Classifications
B; B21; B21D; B21D41/00; Y; Y10; Y10T; Y10T407/00; Y10T407/19; Y10T407/1952; Y10T407/1962; Y10T407/1964
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US172443A
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US1149694A
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US1383839A
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US1711075A
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US1761755A
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US1795358A
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US1962725A
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US2325522A
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US2313474A
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US2346376A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-09-14 | 1952-03-15 | 1952-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-09-14 | 1956-03-15 | 1956-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-09-14 | 1960-03-15 | 1960-09-14 | $7700.00 | Window Closed / Lapsed |