US2698169A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Underground coal auger machine
Assignee: Cardox Corp
•
Filing: 1952-04-17
•
Granted: 1954-12-28
•
Expires: 1972-04-17
Abstract
No abstract record available.
Inventors
- 👤 Donald G Fawkes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:11
CPC Classifications
E; E21; E21C; E21C25/00; E21C25/58; Y; Y10; Y10T; Y10T408/00; Y10T408/36; Y10T408/385; Y10T408/55; Y10T408/564; Y10T408/5647
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US112626A
Cited
US1001903A
Cited
US1776099A
Cited
US1812719A
Cited
US2581667A
Cited
US2625376A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-12-27 | 1958-06-28 | 1958-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-27 | 1962-06-28 | 1962-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-27 | 1966-06-28 | 1966-12-28 | $7700.00 | Window Closed / Lapsed |