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Patent US2852997A successfully refreshed from Google Patents.
US2852997A
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Vehicle ventilation system using shroud chambers
Assignee: Motors Liquidation Co
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Filing: 1954-09-09
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Granted: 1958-09-23
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Expires: 1974-09-09
Abstract
No abstract record available.
Inventors
- 👤 James D Leslie
- 👤 Robert M Fox
- 👤 Ellis J Premo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:13
CPC Classifications
B; B60; B60H; B60H1/00; B60H1/24; B60H1/26; B60H1/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1738377A
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US1748863A
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US2146826A
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US2104394A
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US2235642A
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US2306796A
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US2503323A
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US2625425A
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US2756665A
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US2761370A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-22 | 1962-03-24 | 1962-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-22 | 1966-03-24 | 1966-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-22 | 1970-03-24 | 1970-09-23 | $7700.00 | Window Closed / Lapsed |