US2167798A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for heat treating gears and the like
Assignee: Ohio Crankshaft Co
•
Filing: 1935-08-19
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Granted: 1939-08-01
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Expires: 1955-08-19
Abstract
No abstract record available.
Inventors
- 👤 Francis S Denneen
- 👤 William C Dunn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:13
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/36; H05B6/40; H05B6/405
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) | 1942-07-31 | 1943-01-30 | 1943-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-07-31 | 1947-01-30 | 1947-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-07-31 | 1951-01-30 | 1951-08-01 | $7700.00 | Window Closed / Lapsed |