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Patent US2665074A successfully refreshed from Google Patents.
US2665074A
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Double impeller impact breaker
Assignee: LEE H KESSLER
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Filing: 1950-08-03
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Granted: 1954-01-05
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Expires: 1970-08-03
Abstract
No abstract record available.
Inventors
- 👤 Norman H Kessler
- 👤 Hans I Hansen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:39
CPC Classifications
B; B02; B02C; B02C13/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US748536A
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US2036522A
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US2095385A
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US2373691A
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US2486421A
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US2463631A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-04 | 1957-07-06 | 1958-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-04 | 1961-07-06 | 1962-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-04 | 1965-07-06 | 1966-01-05 | $7700.00 | Window Closed / Lapsed |