US2649284A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inserted tooth rock drill
Assignee: Individual
•
Filing: 1949-02-12
•
Granted: 1953-08-18
•
Expires: 1969-02-12
Abstract
No abstract record available.
Inventors
- 👤 Letts Orlando Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:42
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/02; E21B17/04; E21B17/042; Y; Y10; Y10T; Y10T279/00; Y10T279/16; Y10T403/00; Y10T403/71; Y10T403/7171
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1733241A
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US1063450A
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GB203039A
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GB207260A
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FR643999A
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US1803875A
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US2051525A
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FR799823A
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US2101865A
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US2252745A
Cited
US2215948A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-17 | 1957-02-16 | 1957-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-17 | 1961-02-16 | 1961-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-17 | 1965-02-16 | 1965-08-18 | $7700.00 | Window Closed / Lapsed |