US2912848A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Floor structure having electrical conduits
Assignee: Granite City Steel Co
•
Filing: 1956-12-17
•
Granted: 1959-11-17
•
Expires: 1976-12-17
Abstract
No abstract record available.
Inventors
- 👤 Robert E Lee
- 👤 Irwin A Benjamin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:39
CPC Classifications
E; E04; E04B; E04B5/00; E04B5/48; F; F24; F24D; F24D13/00; F24D13/02; F24D13/022; F24D13/024; Y; Y02; Y02B; Y02B30/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US602274A
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CA514195A
Cited
AT2494B
Cited
US1872984A
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GB332331A
Cited
US2090483A
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GB557588A
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US2445197A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-16 | 1963-05-18 | 1963-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-16 | 1967-05-18 | 1967-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-16 | 1971-05-18 | 1971-11-17 | $7700.00 | Window Closed / Lapsed |