Patent US2474235A successfully refreshed from Google Patents.
US2474235A
Expired / Lapsed
US
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Pneumatic impact device
Assignee: Individual
•
Filing: 1945-12-14
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Granted: 1949-06-28
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Expires: 1965-12-14
Abstract
No abstract record available.
Inventors
- 👤 Oscar C Dresser
- 👤 Norgorden Oscar
- 👤 Francis J Shanahan
- 👤 Carroll R Shuler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:58
CPC Classifications
G; G01; G01N; G01N3/00; G01N3/30; G01N3/307
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US427399A
Cited
US1308811A
Cited
US671505A
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US937009A
Cited
US1160427A
Cited
US2159879A
Cited
US2241184A
Cited
GB542292A
Cited
US2402920A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-27 | 1952-12-27 | 1953-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-27 | 1956-12-27 | 1957-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-27 | 1960-12-27 | 1961-06-28 | $7700.00 | Window Closed / Lapsed |