US2698735A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drilling apparatus
Assignee: Joy Manufacturing Co
•
Filing: 1949-09-13
•
Granted: 1955-01-04
•
Expires: 1969-09-13
Abstract
No abstract record available.
Inventors
- 👤 Ray A Lehner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:26
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/08; E21B19/087; E21D; E21D20/00; E21D20/003
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1541392A
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US2500931A
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US2491273A
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US2456056A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-01-03 | 1958-07-05 | 1959-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-03 | 1962-07-05 | 1963-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-03 | 1966-07-05 | 1967-01-04 | $7700.00 | Window Closed / Lapsed |