US2721733A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cutter drum driven flywheel in mining machine
Assignee: Goodman Manufacturing Co LP
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Filing: 1952-10-23
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Granted: 1955-10-25
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Expires: 1972-10-23
Abstract
No abstract record available.
Inventors
- 👤 Herman W Driehaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:13
CPC Classifications
E; E21; E21C; E21C31/00; E21C31/12; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19851; Y10T74/19865
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-24 | 1959-04-25 | 1959-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-24 | 1963-04-25 | 1963-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-24 | 1967-04-25 | 1967-10-25 | $7700.00 | Window Closed / Lapsed |