US2670060A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Floor structure
Assignee: National Steel Corp
•
Filing: 1947-11-15
•
Granted: 1954-02-23
•
Expires: 1967-11-15
Abstract
No abstract record available.
Inventors
- 👤 Harry D Fenske
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:53
CPC Classifications
B; B62; B62D; B62D25/00; B62D25/20; B62D25/2054; B61; B61D; B61D17/00; B61D17/04; B61D17/10; E; E04; E04B; E04B5/00; E04B5/02; E04B5/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2061825A
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US2062843A
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US2068995A
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US2084853A
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US2216250A
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US2106390A
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US2180317A
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US2294550A
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US2472100A
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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) | 1957-02-22 | 1957-08-24 | 1958-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-22 | 1961-08-24 | 1962-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-22 | 1965-08-24 | 1966-02-23 | $7700.00 | Window Closed / Lapsed |