Patent US3548586A successfully refreshed from Google Patents.
US3548586A
Expired / Lapsed
US
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Composite balance wheel construction for electric timekeeping devices
Assignee: Hamilton Watch Co
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Filing: 1968-10-01
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Granted: 1970-12-22
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Expires: 1988-10-01
Abstract
No abstract record available.
Inventors
- 👤 John L Klinck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:29
CPC Classifications
G; G04; G04C; G04C3/00; G04C3/04; G04C3/06; G04B; G04B17/00; G04B17/04; G04B17/06; G04B17/063; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2953896A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-21 | 1974-06-22 | 1974-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-21 | 1978-06-22 | 1978-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-21 | 1982-06-22 | 1982-12-22 | $7700.00 | Window Closed / Lapsed |