US1399337A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tooth for steam-shovels
Assignee: KEYSTONE DRILLER CO
•
Filing: 1920-02-28
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Granted: 1921-12-06
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Expires: 1940-02-28
Abstract
No abstract record available.
Inventors
- 👤 Downie Robert Rex
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:16
CPC Classifications
E; E02; E02F; E02F9/00; E02F9/28; E02F9/2808; E02F9/2816; E02F9/2833
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) | 1924-12-05 | 1925-06-06 | 1925-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1928-12-05 | 1929-06-06 | 1929-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1932-12-05 | 1933-06-06 | 1933-12-06 | $7700.00 | Window Closed / Lapsed |