Patent US2909372A successfully refreshed from Google Patents.
Patent US2881589A successfully refreshed from Google Patents.
US2881589A
Expired / Lapsed
US
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Pneumatic drill
Assignee: Aro Equipment Corp
•
Filing: 1956-06-25
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Granted: 1959-04-14
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Expires: 1976-06-25
Abstract
No abstract record available.
Inventors
- 👤 Otis D Hitt
- 👤 Short R Stanford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:46
CPC Classifications
B; B23; B23B; B23B45/00; B23B45/04; Y; Y10; Y10T; Y10T408/00; Y10T408/65; Y10T408/675; Y10T408/6757
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-13 | 1962-10-13 | 1963-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-13 | 1966-10-13 | 1967-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-13 | 1970-10-13 | 1971-04-14 | $7700.00 | Window Closed / Lapsed |