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US2701446A
Expired / Lapsed
US
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Electric-hydraulic pusher mechanism for heat treatment furnaces with safety stop control
Assignee: C I HAYES Inc
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Filing: 1952-01-10
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Granted: 1955-02-08
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Expires: 1972-01-10
Abstract
No abstract record available.
Inventors
- 👤 Wesley R Gilbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:55
CPC Classifications
F; F27; F27D; F27D3/00; F27D3/04; F15; F15B; F15B21/00; F15B21/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1877161A
Cited
US2130764A
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US2367241A
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US2327920A
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US2424138A
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US2529777A
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US2603950A
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US2612951A
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US2605751A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-02-07 | 1958-08-09 | 1959-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-02-07 | 1962-08-09 | 1963-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-02-07 | 1966-08-09 | 1967-02-08 | $7700.00 | Window Closed / Lapsed |