US2524044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for heat-treating gear teeth
Assignee: Ohio Crankshaft Co
•
Filing: 1944-08-10
•
Granted: 1950-10-03
•
Expires: 1964-08-10
Abstract
No abstract record available.
Inventors
- 👤 Francis S Denneen
- 👤 William C Dunn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:48
CPC Classifications
C; C21; C21D; C21D9/00; C21D9/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US974099A
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GB225333A
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US1711633A
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US1768159A
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GB416928A
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DE630844C
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GB448241A
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US2145864A
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US2202758A
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US2356150A
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US2294063A
Cited
US2359273A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-10-02 | 1954-04-03 | 1954-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-02 | 1958-04-03 | 1958-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-02 | 1962-04-03 | 1962-10-03 | $7700.00 | Window Closed / Lapsed |