US2478592A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ladder
Assignee: IMAGINEERING Corp
•
Filing: 1945-05-05
•
Granted: 1949-08-09
•
Expires: 1965-05-05
Abstract
No abstract record available.
Inventors
- 👤 Curt E Nyberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:15
CPC Classifications
E; E06; E06C; E06C1/00; E06C1/02; E06C1/38; E06C1/39; E06C1/393; E06C1/14; E06C1/16; E06C1/20; E06C7/00; E06C7/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE220365C
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DE193940C
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US156635A
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US1323227A
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US891736A
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US877867A
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US991603A
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US1184432A
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CA174565A
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US1592109A
Cited
US1479262A
Cited
US1545348A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-08-08 | 1953-02-07 | 1953-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-08 | 1957-02-07 | 1957-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-08 | 1961-02-07 | 1961-08-09 | $7700.00 | Window Closed / Lapsed |