Patent US3616807A successfully refreshed from Google Patents.
US3616807A
Expired / Lapsed
US
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Device for quenching elongated inductively heated workpieces
Assignee: Park Ohio Holdings Corp
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Filing: 1969-08-04
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Granted: 1971-11-02
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Expires: 1989-08-04
Abstract
Abstract A DEVIDE FOR QUENCHING AN INDUCTIVELY HEATED, ELONGATED WORKPIECE HAVING AT LEAST TWO AXIALLY SPACED PORTIONS OF DIFFERENT CROSS-SECTIONS. THE DEVICE INCLUDES TWO SEPARATE QUENCH BODIES HAVING INTERNAL DIMENSIONS GENERALLY MATCHING THE TWO SEPARATE PORTIONS OF THE WORKPIECE AND A SPACE BETWEEN THE BODIES TO ALLOW QUENCHANT TO FLOW THROUGH THIS SPACE FOR MORE UNIFORM QUENCHING OF THE TWO DIFFERENT DIMENSIONED PORTIONS OF THE WORKPIECE.
Inventors
- 👤 Richard J Collins
- 👤 John R Laughlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:15
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/62; C21D9/00; C21D9/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |