Patent US2948412A successfully refreshed from Google Patents.
US2948412A
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Apparatus for augmenting hoist brake capacity
Assignee: Library and Archives Canada
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Filing: 1956-11-15
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Granted: 1960-08-09
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Expires: 1976-11-15
Abstract
No abstract record available.
Inventors
- 👤 Nix Edmund Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:11
CPC Classifications
B; B66; B66C; B66C23/00; B66C23/18; B66C23/36; B66D; B66D5/00; B66D5/02; B66D5/24; B66D5/26; B66C2700/00; B66C2700/03; B66C2700/0321; B66C2700/0357; B66C2700/0364; B66C2700/0371; B66D2700/00; B66D2700/03; B66D2700/035
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB189407539A
Cited
US1759647A
Cited
US1808898A
Cited
US1959533A
Cited
US2265260A
Cited
US2266651A
Cited
US2503891A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-09 | 1964-02-08 | 1964-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-09 | 1968-02-08 | 1968-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-09 | 1972-02-08 | 1972-08-09 | $7700.00 | Window Closed / Lapsed |