Patent US2937598A successfully refreshed from Google Patents.
US2937598A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Free piston
Assignee: US Industries Inc
•
Filing: 1956-11-05
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Granted: 1960-05-24
•
Expires: 1976-11-05
Abstract
No abstract record available.
Inventors
- 👤 Brown Norman Fraser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:03
CPC Classifications
E; E21; E21B; E21B37/00; E21B37/02; E21B37/04; E21B43/00; E21B43/12; E21B43/121
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1819994A
Cited
US1919529A
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US1932451A
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US1919548A
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US2016433A
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US2001012A
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US2246577A
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US2642002A
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US2674951A
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US2676547A
Cited
US2684633A
Cited
US2714855A
Cited
US2762310A
Cited
US2757614A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-24 | 1963-11-23 | 1964-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-24 | 1967-11-23 | 1968-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-24 | 1971-11-23 | 1972-05-24 | $7700.00 | Window Closed / Lapsed |