Patent US2439337A successfully refreshed from Google Patents.
US2439337A
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Impact clutch
Assignee: Independent Pneumatic Tool Co
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Filing: 1943-04-23
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Granted: 1948-04-06
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Expires: 1963-04-23
Abstract
No abstract record available.
Inventors
- 👤 Frithiof P Forss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:43
CPC Classifications
B; B25; B25B; B25B21/00; B25B21/02; B25B21/026; F; F16; F16D; F16D43/00; F16D43/02; F16D43/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1757125A
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US1874658A
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US2178657A
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US2184394A
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US2179724A
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US2236101A
Cited
US2343332A
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US2326347A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-04-06 | 1951-10-06 | 1952-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-04-06 | 1955-10-06 | 1956-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-04-06 | 1959-10-06 | 1960-04-06 | $7700.00 | Window Closed / Lapsed |