US2632592A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ladder
Assignee: CHART ALUMINUM PRODUCTS CORP
•
Filing: 1949-10-14
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Granted: 1953-03-24
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Expires: 1969-10-14
Abstract
No abstract record available.
Inventors
- 👤 Harry M Eisman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:46
CPC Classifications
E; E06; E06C; E06C7/00; E06C7/08; E06C7/082; E06C7/086; E06C1/00; E06C1/02; E06C1/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US376794A
Cited
GB190810457A
Cited
US1036932A
Cited
US1935349A
Cited
US2113403A
Cited
US2594561A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-23 | 1956-09-22 | 1957-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-23 | 1960-09-22 | 1961-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-23 | 1964-09-22 | 1965-03-24 | $7700.00 | Window Closed / Lapsed |