Patent US2491805A successfully refreshed from Google Patents.
US2491805A
Expired / Lapsed
US
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Brick grab
Assignee: Individual
•
Filing: 1946-06-10
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Granted: 1949-12-20
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Expires: 1966-06-10
Abstract
No abstract record available.
Inventors
- 👤 Robert A Fontaine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:26
CPC Classifications
B; B66; B66C; B66C1/00; B66C1/10; B66C1/22; B66C1/24; B66F; B66F9/00; B66F9/06; B66F9/075; B66F9/12; B66F9/18; B66F9/183; B66F9/188
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US976393A
Cited
US1401429A
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US1649343A
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US1833545A
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US2178369A
Cited
US2250273A
Cited
US2323810A
Cited
US2403356A
Cited
US2441750A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-19 | 1953-06-20 | 1953-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-19 | 1957-06-20 | 1957-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-19 | 1961-06-20 | 1961-12-20 | $7700.00 | Window Closed / Lapsed |