US2439154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Detachable calendar mechanism for clocks
Assignee: GEORGE M HARPER JR
•
Filing: 1945-02-19
•
Granted: 1948-04-06
•
Expires: 1965-02-19
Abstract
No abstract record available.
Inventors
- 👤 Webb Byron Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:10
CPC Classifications
G; G04; G04C; G04C17/00; G04C17/0008; G04C17/0016
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US469802A
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US472952A
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US574922A
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FR337342A
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US957397A
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US1295876A
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DE548867C
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US1959077A
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GB517865A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-04-06 | 1951-10-06 | 1952-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-04-06 | 1955-10-06 | 1956-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-04-06 | 1959-10-06 | 1960-04-06 | $7700.00 | Window Closed / Lapsed |