US2517639A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooling tower water distribution system
Assignee: Fluor Corp
•
Filing: 1946-12-24
•
Granted: 1950-08-08
•
Expires: 1966-12-24
Abstract
No abstract record available.
Inventors
- 👤 Flon James G De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:26
CPC Classifications
F; F28; F28D; F28D3/00; F28D3/04; F28F; F28F25/00; F28F25/02; F28F25/06; Y; Y10; Y10S; Y10S165/00; Y10S165/092; Y10S165/90
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US700990A
Cited
AT46666B
Cited
GB191421205A
Cited
US1176747A
Cited
US1874020A
Cited
FR857376A
Cited
US2247514A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-07 | 1954-02-06 | 1954-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-07 | 1958-02-06 | 1958-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-07 | 1962-02-06 | 1962-08-08 | $7700.00 | Window Closed / Lapsed |