Patent US1610372A successfully refreshed from Google Patents.
US1610372A
Expired / Lapsed
US
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Submarine hammer-drill unit
Assignee: Ingersoll Rand Co
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Filing: 1925-08-24
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Granted: 1926-12-14
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Expires: 1945-08-24
Abstract
No abstract record available.
Inventors
- 👤 Charles C Hansen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:47
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/12; E21B7/122; Y; Y10; Y10S; Y10S173/00; Y10S173/01; Y10T; Y10T279/00; Y10T279/17; Y10T279/17042; Y10T279/17076
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) | 1929-12-13 | 1930-06-14 | 1930-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1933-12-13 | 1934-06-14 | 1934-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1937-12-13 | 1938-06-14 | 1938-12-14 | $7700.00 | Window Closed / Lapsed |