US2856981A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for forming tube turns
Assignee: Fluor Corp
•
Filing: 1955-08-19
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Granted: 1958-10-21
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Expires: 1975-08-19
Abstract
No abstract record available.
Inventors
- 👤 Gifford L Hitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:58
CPC Classifications
B; B21; B21D; B21D9/00; B21D9/05; B21D9/07; B21D9/073
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1353714A
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US1370074A
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DE329209C
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US1908373A
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DE607325C
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US2181384A
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US2318113A
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US2242332A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-20 | 1962-04-21 | 1962-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-20 | 1966-04-21 | 1966-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-20 | 1970-04-21 | 1970-10-21 | $7700.00 | Window Closed / Lapsed |