Patent US2752844A successfully refreshed from Google Patents.
US2752844A
Expired / Lapsed
US
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Adjustable wall-mounted ventilator
Assignee: SHAWNEE IND Inc
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Filing: 1954-01-18
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Granted: 1956-07-03
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Expires: 1974-01-18
Abstract
No abstract record available.
Inventors
- 👤 Allen L Simblest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:51
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/08; F24F13/082; F24F13/084
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US935187A
Cited
US1463294A
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US1609409A
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US2049856A
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US2082405A
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US2323178A
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US2355836A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-03 | 1960-01-02 | 1960-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-03 | 1964-01-02 | 1964-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-03 | 1968-01-02 | 1968-07-03 | $7700.00 | Window Closed / Lapsed |