Patent US2689654A successfully refreshed from Google Patents.
Patent US2168905A successfully refreshed from Google Patents.
US2168905A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wagon drill
Assignee: Chicago Pneumatic Tool Co LLC
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Filing: 1937-07-31
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Granted: 1939-08-08
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Expires: 1957-07-31
Abstract
No abstract record available.
Inventors
- 👤 Earl B Lear
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:47
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/02; E21B7/027; E21B7/028; E21B15/00; E21B15/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1942-08-07 | 1943-02-06 | 1943-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-08-07 | 1947-02-06 | 1947-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-08-07 | 1951-02-06 | 1951-08-08 | $7700.00 | Window Closed / Lapsed |