Patent US2618241A successfully refreshed from Google Patents.
US2618241A
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US
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Drill turning mechanism of hammer drills
Assignee: Atlas Copco AB
•
Filing: 1949-07-06
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Granted: 1952-11-18
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Expires: 1969-07-06
Abstract
No abstract record available.
Inventors
- 👤 Larcen Jan August
- 👤 Ytterfors Sven Laurentius
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:55
CPC Classifications
E; E21; E21B; E21B6/00; E21B6/06; E21B6/08; Y; Y10; Y10T; Y10T29/00; Y10T29/45; Y10T29/4572; Y10T29/4583
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US951465A
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US1097997A
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US1086625A
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US1390787A
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US1621663A
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US1779645A
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US2001190A
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US2225531A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-11-18 | 1956-05-19 | 1956-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-18 | 1960-05-19 | 1960-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-18 | 1964-05-19 | 1964-11-18 | $7700.00 | Window Closed / Lapsed |