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Patent US2662733A successfully refreshed from Google Patents.
US2662733A
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Scaffold hoisting mechanism
Assignee: WILBERD F FEIGENBAUM
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Filing: 1950-11-06
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Granted: 1953-12-15
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Expires: 1970-11-06
Abstract
No abstract record available.
Inventors
- 👤 Allenbaugh Ralph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:54
CPC Classifications
E; E04; E04G; E04G3/00; E04G3/28; E04G3/30; E04G3/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1110169A
Cited
US1101595A
Cited
US1820314A
Cited
US2495804A
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US2416585A
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US2508187A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-14 | 1957-06-15 | 1957-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-14 | 1961-06-15 | 1961-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-14 | 1965-06-15 | 1965-12-15 | $7700.00 | Window Closed / Lapsed |