US2437484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooling tower
Assignee: GEORGE W NULL
•
Filing: 1945-01-22
•
Granted: 1948-03-09
•
Expires: 1965-01-22
Abstract
No abstract record available.
Inventors
- 👤 Edward W Simons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:58
CPC Classifications
F; F28; F28F; F28F25/00; F28F25/10; F28F25/12; F28C; F28C1/00; F28C1/02; F28F25/02; F28F25/08; F28F25/082; 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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GB190113473A
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GB190516635A
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US1747288A
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FR627081A
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US1872599A
Cited
DE543273C
Cited
US2207272A
Cited
US2197970A
Cited
US2239936A
Cited
US2279425A
Cited
US2247514A
Cited
GB543110A
Cited
US2356192A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-03-09 | 1951-09-08 | 1952-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-03-09 | 1955-09-08 | 1956-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-03-09 | 1959-09-08 | 1960-03-09 | $7700.00 | Window Closed / Lapsed |