US2827263A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well drilling equipment
Assignee: AMERICAN PERCUSSION TOOL Co
•
Filing: 1954-08-27
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Granted: 1958-03-18
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Expires: 1974-08-27
Abstract
No abstract record available.
Inventors
- 👤 James G Scott
- 👤 Roland A Freeman
- 👤 Reese T Houston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:31
CPC Classifications
E; E21; E21B; E21B4/00; E21B4/06; E21B4/12
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) | 1961-03-17 | 1961-09-16 | 1962-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-17 | 1965-09-16 | 1966-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-17 | 1969-09-16 | 1970-03-18 | $7700.00 | Window Closed / Lapsed |