US3382939A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Boring cylinder and bit
Assignee: ARTIS MCLENDON SR
•
Filing: 1965-12-13
•
Granted: 1968-05-14
•
Expires: 1985-12-13
Abstract
No abstract record available.
Inventors
- 👤 Sr Artis Mclendon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:42
CPC Classifications
E; E21; E21B; E21B37/00; E21B37/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1297708A
Cited
US1879222A
Cited
US2320612A
Cited
US2577605A
Cited
US2666623A
Cited
US2893695A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-14 | 1971-11-13 | 1972-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-14 | 1975-11-13 | 1976-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-14 | 1979-11-13 | 1980-05-14 | $7700.00 | Window Closed / Lapsed |