Patent US2672328A successfully refreshed from Google Patents.
US2672328A
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Water power-driven fan for mechanical draft cooling towers
Assignee: Marley Co LLC
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Filing: 1950-08-21
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Granted: 1954-03-16
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Expires: 1970-08-21
Abstract
No abstract record available.
Inventors
- 👤 Leon T Mart
- 👤 County Johnson
- 👤 Homer E Fordyce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:21
CPC Classifications
F; F28; F28C; F28C1/00; F04; F04D; F04D25/00; F04D25/02; F04D25/04; Y; Y02; Y02B; Y02B30/00; Y02B30/70; Y10; Y10S; Y10S261/00; Y10S261/11
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US621718A
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US941841A
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US976246A
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US1156946A
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US1340517A
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US1679793A
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DE531366C
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US2508673A
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US2512782A
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US2590190A
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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) | 1957-03-15 | 1957-09-14 | 1958-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-15 | 1961-09-14 | 1962-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-15 | 1965-09-14 | 1966-03-16 | $7700.00 | Window Closed / Lapsed |