US3017935A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drilling apparatus for tractors
Assignee: Individual
•
Filing: 1958-02-18
•
Granted: 1962-01-23
•
Expires: 1978-02-18
Abstract
No abstract record available.
Inventors
- 👤 Sidney W Galbraith
- 👤 Robert G Perkins
- 👤 Hubert C Westfall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:50
CPC Classifications
E; E02; E02F; E02F9/00; E02F9/24; E21; E21B; E21B19/00; E21B19/08; E21B19/087
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1612186A
Cited
US1286805A
Cited
US2169815A
Cited
US2335172A
Cited
US2410508A
Cited
US2815191A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-01-22 | 1965-07-24 | 1966-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-22 | 1969-07-24 | 1970-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-22 | 1973-07-24 | 1974-01-23 | $7700.00 | Window Closed / Lapsed |