Patent US2816435A successfully refreshed from Google Patents.
US2816435A
Expired / Lapsed
US
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Head frame for structural column
Assignee: Lally Column Co
•
Filing: 1954-09-20
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Granted: 1957-12-17
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Expires: 1974-09-20
Abstract
No abstract record available.
Inventors
- 👤 Donahue John Stanley
- 👤 George E Strehan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:22
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/18; E04B1/185; E04B5/00; E04B5/43
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US835718A
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US869869A
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US969097A
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US1185207A
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US1190002A
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US1472600A
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US2176007A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-16 | 1961-06-17 | 1961-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-16 | 1965-06-17 | 1965-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-16 | 1969-06-17 | 1969-12-17 | $7700.00 | Window Closed / Lapsed |