US2540091A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-cooling tower
Assignee: Individual
•
Filing: 1947-06-16
•
Granted: 1951-02-06
•
Expires: 1967-06-16
Abstract
No abstract record available.
Inventors
- 👤 Lester E Brackney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:44
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)
US409196A
Cited
US799320A
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GB191028248A
Cited
US1260366A
Cited
US1545123A
Cited
US1747452A
Cited
US2002065A
Cited
US2129624A
Cited
US2397458A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-05 | 1954-08-07 | 1955-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-05 | 1958-08-07 | 1959-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-05 | 1962-08-07 | 1963-02-06 | $7700.00 | Window Closed / Lapsed |