Patent US2556878A successfully refreshed from Google Patents.
US2556878A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fireproofed flanged structural member and a precast shoe therefor
Assignee: Individual
•
Filing: 1944-04-11
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Granted: 1951-06-12
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Expires: 1964-04-11
Abstract
No abstract record available.
Inventors
- 👤 John V Kohlhaas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:24
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/62; E04B1/92; E04B1/94; E04B1/941; E04B1/943; E04B1/944
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB202572A
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US1597167A
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FR676335A
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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) | 1954-06-11 | 1954-12-11 | 1955-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-11 | 1958-12-11 | 1959-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-11 | 1962-12-11 | 1963-06-12 | $7700.00 | Window Closed / Lapsed |