Patent US2740550A successfully refreshed from Google Patents.
US2740550A
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US
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Concealed hinge
Assignee: ILLINOIS WATCH CASE CO
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Filing: 1951-10-09
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Granted: 1956-04-03
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Expires: 1971-10-09
Abstract
No abstract record available.
Inventors
- 👤 Ellison S Irelan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:30
CPC Classifications
A; A45; A45D; A45D40/00; A45D40/22; A45D40/221; A45D2040/0012; A45D2040/225; A45D2040/226; A45D2040/227; A45D33/00; A45D33/006; A45D33/008
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US228598A
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US293416A
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US480790A
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US847717A
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US880892A
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US1126217A
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US1505029A
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US1742718A
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US2114644A
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US2129862A
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US2576996A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-03 | 1959-10-03 | 1960-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-03 | 1963-10-03 | 1964-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-03 | 1967-10-03 | 1968-04-03 | $7700.00 | Window Closed / Lapsed |