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US2163209A
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Welded structural element
Assignee: Kohle und Eisenforschung GmbH
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Filing: 1938-02-17
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Granted: 1939-06-20
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Expires: 1958-02-17
Abstract
No abstract record available.
Inventors
- 👤 Pungel Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:49
CPC Classifications
E; E04; E04C; E04C3/00; E04C3/02; E04C3/04; E04C3/06; E04C2003/0404; E04C2003/0408; E04C2003/0413; E04C2003/0426; E04C2003/0434; E04C2003/0443; E04C2003/046; Y; Y10; Y10T; Y10T403/00; Y10T403/47; Y10T403/477; Y10T428/00; Y10T428/12; Y10T428/12375; Y10T428/12451
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) | 1942-06-19 | 1942-12-19 | 1943-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-06-19 | 1946-12-19 | 1947-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-06-19 | 1950-12-19 | 1951-06-20 | $7700.00 | Window Closed / Lapsed |