Patent US2631022A successfully refreshed from Google Patents.
US2631022A
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US
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Cooling tower
Assignee: Hudson Engineering Corp
•
Filing: 1948-10-08
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Granted: 1953-03-10
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Expires: 1968-10-08
Abstract
No abstract record available.
Inventors
- 👤 John B Baird
- 👤 Bach Neal B Lau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:11
CPC Classifications
F; F28; F28C; F28C1/00; F28C1/02; 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)
US444558A
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GB190316724A
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US1187399A
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US1225889A
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US1235291A
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US1948980A
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US1987881A
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US2132939A
Cited
US2207272A
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US2347757A
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US2363578A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-09 | 1956-09-08 | 1957-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-09 | 1960-09-08 | 1961-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-09 | 1964-09-08 | 1965-03-10 | $7700.00 | Window Closed / Lapsed |