US2815191A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for carrying a drilling mechanism along a desired path
Assignee: Jeffrey Manufacturing Co
•
Filing: 1950-05-10
•
Granted: 1957-12-03
•
Expires: 1970-05-10
Abstract
No abstract record available.
Inventors
- 👤 John S Beltz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:30
CPC Classifications
E; E21; E21D; E21D20/00; E21D20/003; E21B; E21B19/00; E21B19/08; E21B19/087
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1885295A
Cited
US2410508A
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US2557637A
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US2409843A
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US2532079A
Cited
US2581535A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-02 | 1961-06-03 | 1961-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-02 | 1965-06-03 | 1965-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-02 | 1969-06-03 | 1969-12-03 | $7700.00 | Window Closed / Lapsed |