Patent US1966349A successfully refreshed from Google Patents.
US2693733A
Expired / Lapsed
US
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Power hammer for mechanical tamping
Assignee: Joy Manufacturing Co
•
Filing: 1950-02-09
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Granted: 1954-11-09
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Expires: 1970-02-09
Abstract
No abstract record available.
Inventors
- 👤 Walter D Fish
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:25
CPC Classifications
F; F42; F42D; F42D1/00; F42D1/08; Y; Y10; Y10T; Y10T279/00; Y10T279/12; Y10T279/1241
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-08 | 1958-05-10 | 1958-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-08 | 1962-05-10 | 1962-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-08 | 1966-05-10 | 1966-11-09 | $7700.00 | Window Closed / Lapsed |