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US2531794A
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Assignee: Schwitzer Cummins Co
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Filing: 1945-04-20
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Granted: 1950-11-28
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Expires: 1965-04-20
Abstract
No abstract record available.
Inventors
- 👤 David C Walmsley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:57
CPC Classifications
F; F04; F04B; F04B9/00; F04B9/14; B; B66; B66F; B66F3/00; B66F3/24; B66F3/25; B66F3/42; F04B53/00; F04B53/10; F04B53/12; F04B53/125; F04B53/126; F04B2205/00; F04B2205/15; F04B2205/151
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2057934A
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US2187036A
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US2362139A
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US2366080A
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US2420910A
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US2488356A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-27 | 1954-05-29 | 1954-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-27 | 1958-05-29 | 1958-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-27 | 1962-05-29 | 1962-11-28 | $7700.00 | Window Closed / Lapsed |