US2549174A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-cooled shaft
Assignee: Fly Ash Arrestor Corp
•
Filing: 1948-08-09
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Granted: 1951-04-17
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Expires: 1968-08-09
Abstract
No abstract record available.
Inventors
- 👤 Richard W Coward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:26
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/05; F04D29/053; F04D29/58; F04D29/582; F04D29/584
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-16 | 1954-10-16 | 1955-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-16 | 1958-10-16 | 1959-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-16 | 1962-10-16 | 1963-04-17 | $7700.00 | Window Closed / Lapsed |