US3141909A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Turbine drive for cooling tower fan
Assignee: Allis Chalmers Corp
•
Filing: 1962-02-12
•
Granted: 1964-07-21
•
Expires: 1982-02-12
Abstract
No abstract record available.
Inventors
- 👤 Jr Howard A Mayo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:18
CPC Classifications
F; F28; F28F; F28F25/00; F28F25/10; Y; Y10; Y10S; Y10S261/00; Y10S261/11
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US678979A
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US1050505A
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US1165794A
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DE531366C
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US2540091A
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US2672328A
Cited
US2863652A
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US2979272A
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US2975791A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-07-21 | 1968-01-20 | 1968-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-21 | 1972-01-20 | 1972-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-21 | 1976-01-20 | 1976-07-21 | $7700.00 | Window Closed / Lapsed |