US2638909A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quench tank for heat-treating processes
Assignee: International Motors LLC
•
Filing: 1949-09-22
•
Granted: 1953-05-19
•
Expires: 1969-09-22
Abstract
No abstract record available.
Inventors
- 👤 William C Hiatt
- 👤 Walter B Cheney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:07
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/62; C21D1/63; C21D1/64
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US737079A
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US646266A
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US982578A
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US1059845A
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US1459079A
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GB290182A
Cited
US2052254A
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CH239422A
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US2374500A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-18 | 1956-11-17 | 1957-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-18 | 1960-11-17 | 1961-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-18 | 1964-11-17 | 1965-05-19 | $7700.00 | Window Closed / Lapsed |