US2419619A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of heat-treating flanges and the like
Assignee: Ohio Crankshaft Co
•
Filing: 1943-02-13
•
Granted: 1947-04-29
•
Expires: 1963-02-13
Abstract
No abstract record available.
Inventors
- 👤 Alden O Wood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:51
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/36; H05B6/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1946876A
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US1878458A
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GB435343A
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US2170130A
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US2293534A
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US2268527A
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US2326674A
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US2292209A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-04-28 | 1950-10-28 | 1951-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-04-28 | 1954-10-28 | 1955-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-04-28 | 1958-10-28 | 1959-04-29 | $7700.00 | Window Closed / Lapsed |