Patent US2594561A successfully refreshed from Google Patents.
US2594561A
Expired / Lapsed
US
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Ladder of lightweight metals
Assignee: PATENT SCAFFOLDING CO Inc
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Filing: 1948-06-03
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Granted: 1952-04-29
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Expires: 1968-06-03
Abstract
No abstract record available.
Inventors
- 👤 Huck Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:18
CPC Classifications
E; E06; E06C; E06C7/00; E06C7/08; E06C7/082; E06C7/086; F; F16; F16B; F16B2200/00; F16B2200/40; F16B2200/403; Y; Y10; Y10T; Y10T403/00; Y10T403/33
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB175157A
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US1422654A
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US1575208A
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GB282958A
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DE468382C
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GB362382A
Cited
US1974458A
Cited
US2171863A
Cited
DE696511C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-29 | 1955-10-29 | 1956-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-29 | 1959-10-29 | 1960-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-29 | 1963-10-29 | 1964-04-29 | $7700.00 | Window Closed / Lapsed |