Patent US2229462A successfully refreshed from Google Patents.
US2229462A
Expired / Lapsed
US
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Method and apparatus for forming flat-sided tubing
Assignee: General Electric Co
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Filing: 1939-09-28
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Granted: 1941-01-21
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Expires: 1959-09-28
Abstract
No abstract record available.
Inventors
- 👤 Lowell M Kurtz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:19
CPC Classifications
B; B21; B21C; B21C37/00; B21C37/06; B21C37/15; B21C3/00; B21C3/02; B21C3/04; B21C37/155; B21D; B21D11/00; B21D11/06; B21D53/00; B21D53/02; B21D53/027
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) | 1944-01-21 | 1944-07-22 | 1945-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-01-21 | 1948-07-22 | 1949-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-01-21 | 1952-07-22 | 1953-01-21 | $7700.00 | Window Closed / Lapsed |