US2610707A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Building structure
Assignee: National Steel Corp
•
Filing: 1946-02-23
•
Granted: 1952-09-16
•
Expires: 1966-02-23
Abstract
No abstract record available.
Inventors
- 👤 Harold S Shannon
- 👤 Thaddeus B Hurd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:44
CPC Classifications
E; E04; E04B; E04B5/00; E04B5/02; E04B5/10; E04F; E04F15/00; E04F15/02; E04F15/024; E04F15/02044; E04F2015/0205; E04F2015/02066; E04F2015/02077
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR354172A
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US844295A
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US1331247A
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US1847891A
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US1857326A
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US1857490A
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US2046593A
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US1997607A
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US1988388A
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US2005427A
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US2129976A
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US2109655A
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US2042290A
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US2181169A
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US2387229A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-09-16 | 1956-03-17 | 1956-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-16 | 1960-03-17 | 1960-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-16 | 1964-03-17 | 1964-09-16 | $7700.00 | Window Closed / Lapsed |