US2610031A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic rotary drill
Assignee: Individual
•
Filing: 1948-01-12
•
Granted: 1952-09-09
•
Expires: 1968-01-12
Abstract
No abstract record available.
Inventors
- 👤 John A Bradley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:24
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/18; E02; E02D; E02D19/00; E02D19/06; E02D19/10; E21B7/02; E21B7/021; Y; Y10; Y10S; Y10S60/00; Y10S60/912; Y10T; Y10T279/00; Y10T279/17; Y10T279/17666; Y10T279/17692; Y10T279/17743
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1407927A
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US1848192A
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GB296352A
Cited
US1940800A
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US2131056A
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US2215928A
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US2203216A
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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) | 1955-09-09 | 1956-03-10 | 1956-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-09 | 1960-03-10 | 1960-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-09 | 1964-03-10 | 1964-09-09 | $7700.00 | Window Closed / Lapsed |