US2581872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Propeller fan blade retaining construction
Assignee: Madison Management Group Inc
•
Filing: 1946-11-21
•
Granted: 1952-01-08
•
Expires: 1966-11-21
Abstract
No abstract record available.
Inventors
- 👤 William E Morrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:26
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/26; F04D29/32; F04D29/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US541000A
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US1042431A
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US1184168A
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US1286526A
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US1260562A
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US1536306A
Cited
GB492801A
Cited
GB530356A
Cited
US2457325A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-01-07 | 1955-07-09 | 1956-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-07 | 1959-07-09 | 1960-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-07 | 1963-07-09 | 1964-01-08 | $7700.00 | Window Closed / Lapsed |