US2651501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary cutter for drills
Assignee: Individual
•
Filing: 1951-02-15
•
Granted: 1953-09-08
•
Expires: 1971-02-15
Abstract
No abstract record available.
Inventors
- 👤 Richard D Mcmahon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:50
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/08; E21B10/16; E21B10/006; E21B10/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1483487A
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US1660309A
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US1789834A
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US1847824A
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US1918902A
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US2061141A
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US2075997A
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US2080117A
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US2190350A
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US2187037A
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US2427226A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-07 | 1957-03-09 | 1957-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-07 | 1961-03-09 | 1961-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-07 | 1965-03-09 | 1965-09-08 | $7700.00 | Window Closed / Lapsed |