US3117756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill positioning device
Assignee: Gardner Denver Inc
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Filing: 1960-08-01
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Granted: 1964-01-14
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Expires: 1980-08-01
Abstract
No abstract record available.
Inventors
- 👤 Francis M Wensing
- 👤 Richard W Yerbury
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:32
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/02; E21B7/025; E21B19/00; E21B19/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-01-13 | 1967-07-15 | 1968-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-01-13 | 1971-07-15 | 1972-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-01-13 | 1975-07-15 | 1976-01-14 | $7700.00 | Window Closed / Lapsed |