US2434896A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal impeller
Assignee: AYR CORP
•
Filing: 1942-08-08
•
Granted: 1948-01-27
•
Expires: 1962-08-08
Abstract
No abstract record available.
Inventors
- 👤 Ayers William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:52
CPC Classifications
F; F04; F04D; F04D17/00; F04D17/08; F04D17/16; F04D17/165
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE369078C
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US1075120A
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US1199375A
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US1199374A
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US1433995A
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FR539882A
Cited
US1529631A
Cited
US1785354A
Cited
GB505078A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-01-26 | 1951-07-28 | 1952-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-01-26 | 1955-07-28 | 1956-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-01-26 | 1959-07-28 | 1960-01-27 | $7700.00 | Window Closed / Lapsed |