US2647737A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cutter bit and holder therefor
Assignee: Marathon Coal Bit Co Inc
•
Filing: 1950-07-26
•
Granted: 1953-08-04
•
Expires: 1970-07-26
Abstract
No abstract record available.
Inventors
- 👤 Henry M Stephens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:25
CPC Classifications
E; E21; E21C; E21C35/00; E21C35/18; E21C35/19; E21C35/193; E21C35/1936; Y; Y10; Y10T; Y10T407/00; Y10T407/22; Y10T407/227; Y10T407/23
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2183581A
Cited
GB190222042A
Cited
US1468866A
Cited
US2229777A
Cited
US2289464A
Cited
US2262592A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-03 | 1957-02-02 | 1957-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-03 | 1961-02-02 | 1961-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-03 | 1965-02-02 | 1965-08-04 | $7700.00 | Window Closed / Lapsed |