US2787207A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Twin window fans
Assignee: Knapp Monarch Co
•
Filing: 1953-06-01
•
Granted: 1957-04-02
•
Expires: 1973-06-01
Abstract
No abstract record available.
Inventors
- 👤 Walter E Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:23
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/60; F04D29/64; F04D29/644; F04D29/646; F04D25/00; F04D25/16; F04D25/166
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US595284A
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US611190A
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US2123448A
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US2451193A
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US2453009A
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US2525853A
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US2633293A
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US2544281A
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US2620126A
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US2660368A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-01 | 1960-10-01 | 1961-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-01 | 1964-10-01 | 1965-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-01 | 1968-10-01 | 1969-04-02 | $7700.00 | Window Closed / Lapsed |