US2620782A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air intake stack for air-cooling of internal-combustion engines
Assignee: LOCKE STEEL CHAIN CO
•
Filing: 1949-11-29
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Granted: 1952-12-09
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Expires: 1969-11-29
Abstract
No abstract record available.
Inventors
- 👤 Henry J Stegeman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:19
CPC Classifications
F; F01; F01P; F01P1/00; F01P1/02; F01P5/00; F01P5/02; F01P5/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1306421A
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US1331649A
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US1660079A
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US1646757A
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US2172992A
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US2254927A
Cited
US2445965A
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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) | 1955-12-09 | 1956-06-09 | 1956-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-09 | 1960-06-09 | 1960-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-09 | 1964-06-09 | 1964-12-09 | $7700.00 | Window Closed / Lapsed |