US3378239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Counterflow cooling tower
Assignee: Baltimore Aircoil Co Inc
•
Filing: 1967-03-10
•
Granted: 1968-04-16
•
Expires: 1987-03-10
Abstract
No abstract record available.
Inventors
- 👤 Jr John Engalitcheff
- 👤 Thomas F Facius
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:13
CPC Classifications
B; B01; B01F; B01F25/00; B01F25/40; B01F25/42; B01F25/43; B01F25/431; B01F25/4315; B01F25/43151; B01F25/43197; B01F25/431971; F; F28; F28C; F28C1/00; F28C1/02; F28F; F28F25/00; F28F25/02; F28F25/04; 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)
US736087A
Cited
FR414720A
Cited
US1005809A
Cited
US2064808A
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US2612359A
Cited
US2497389A
Cited
US2872168A
Cited
US2990031A
Cited
US2890870A
Cited
US3290867A
Cited
US3290025A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-16 | 1971-10-16 | 1972-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-16 | 1975-10-16 | 1976-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-16 | 1979-10-16 | 1980-04-16 | $7700.00 | Window Closed / Lapsed |