US2690646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Escapement mechanism
Assignee: Individual
•
Filing: 1949-06-02
•
Granted: 1954-10-05
•
Expires: 1969-06-02
Abstract
No abstract record available.
Inventors
- 👤 Clifford Cecil Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:53
CPC Classifications
G; G04; G04C; G04C5/00; G04C5/005; Y; Y10; Y10T; Y10T74/00; Y10T74/15; Y10T74/1502
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE277760C
Cited
US554700A
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DE451035C
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US1522217A
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US1825382A
Cited
US1771383A
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US2061047A
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US2427990A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-10-04 | 1958-04-05 | 1958-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-10-04 | 1962-04-05 | 1962-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-10-04 | 1966-04-05 | 1966-10-05 | $7700.00 | Window Closed / Lapsed |