Patent US2144447A successfully refreshed from Google Patents.
US2144447A
Expired / Lapsed
US
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Mechanical movement
Assignee: Individual
•
Filing: 1938-03-11
•
Granted: 1939-01-17
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Expires: 1958-03-11
Abstract
No abstract record available.
Inventors
- 👤 George E Barnhart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:59
CPC Classifications
F; F16; F16B; F16B1/00; F16B1/02; F16B1/04; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18568; Y10T74/18576; Y10T74/20; Y10T74/20396; Y10T74/20474; Y10T74/20492; Y10T74/20504
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1942-01-16 | 1942-07-18 | 1943-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-01-16 | 1946-07-18 | 1947-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-01-16 | 1950-07-18 | 1951-01-17 | $7700.00 | Window Closed / Lapsed |